SH1211 MouseCoder Ergonomic Mouse PS/2 and RS232 Encoder

Transcription

1 SH MouseCoder Ergonomic Mouse PS/ and RS Encoder HID & SYSTEM MANAGEMENT PRODUCTS, MOUSECODER FAMILY PRELIMINARY DESCRIPTION The SH MouseCoder is an easy-to-use single-chip multimouse encoder with an advanced motion algorithm for accurate cursor control. The SH offers low power consumption in a smallfootprint package, and connects to a host serial or a PS/ mouse port. The SH is designed for use with a Fujitsu Takamisawa FID- Hall-effect sensor (HulaPoint ), a resistive analog joystick sensor (like the CTS ), a switch joystick sensor, an FSR sensor, or a Varatouch MicroPoint sensor, as well as others. The SH provides an external port for hot-plug connection of a PS/ mouse, including one with wheel function. SH serial communication is unidirectional at a fixed speed of 00 Baud. PS/ communication is bidirectional at 0 Kbps. The SH is a CMOS device operating at MHz. It can return mouse reports at the rate of 00 per second. The SH is compatible with the standard twobutton mouse protocol, the standard three-button mouse protocol, and standard wheel mouse protocols. It implements all commands from and to the system, as defined in the IBM PS/ mouse communication protocol. FEATURES Advanced motion-control algorithm for accurate cursor control Low power consumption in a. to. volt operating range Compatible with standard twobutton, three-button, and wheel mice RS or PS/ host interface APPLICATIONS Embedded HulaPoints Industrial panels Joystick applications PIN ASSIGNMENTS SEN00 SEN0 SEN0 SEN0 VREF _RESET VSS VDD 9 SEN INTSEL TxD SCLK SEN0 SEN0 SEN0 SEN0 Works with a Hall-effect sensor Works with a resistive analog joystick sensor Works with a switch joystick sensor Works with an FSR sensor Works with a Varatouch MicroPoint sensor Available in a small -pin plastic LQFP package Industrial keyboards Instrumentation Gaming SH-FG LQFP SEN0 SEN09 EMDAT MCLK SEN0 VSS _OSCOUT OSCIN SEN SEN SEN SENSEL SEN MDAT/RTS SENSEL EMCLK The SH s low power consumption makes it ideal for battery operated systems. Semtech, the Semtech logo, MouseCoder, and HulaPoint are marks of Semtech Corporation. Force Sensing Resistor and FSR are marks of Interlink Electronics, Inc. MicroPoint is a mark of Varatouch Technology, Inc. All other marks belong to their respective owners. Copyright Semtech Corporation SH data sheet v.0 (00-0)

2 ORDERING CODE SH-FG LQFP -pin, 0. mm pitch, TA = -0 C to + C EVK-SH Evaluation kit FUNCTIONAL DESCRIPTION The SH consists functionally of five major sections (see block diagram below). These are the Sensor Interface, the -bit Timer, the Oscillator Circuit, the PS/ Communication Port and the RS Communication Port. All sections communicate with each other and operate concurrently. BLOCK DIAGRAM Left, Middle/Up, Right, & Down Buttons Data Buffer Switch Interface MCLK MDAT Host PS/ Communication Port X Input Analog Signal Input Y Input TxD RTS Host Serial Communication Port Control Sensor Power Strobe Sensor Interface EMCLK EMDAT External PS/ Port -bit Timer RESET Power-on Reset Oscillator Circuit OSCIN-OSCOUT Copyright Semtech Corporation SH data sheet v.0 (00-0)

3 MOUSE EMULATION The SH emulates either a standard -button mouse or a standard wheel mouse. The state of the button configuration pin (BCONF, pin 0) determines which mouse type is emulated. The pin left floating specifies -button mode, the pin tied to ground specifies wheel mode. In -button mode, the left, right and middle buttons are implemented. In wheel mode, the left, right, up, and down buttons are implemented; pressing up and down buttons together emulates a middle-button press. POWER CONSUMPTION The SH typically consumes less than ma in standby for HulaPoint or analog joystick sensors and less than µa for other sensors. SENSOR CONFIGURATIONS The SH has built-in support applicable to many sensors, including the following: HulaPoint Fujitsu Takamisawa FID- Hall-effect sensor Analog joystick sensor such as the CTS Switch joystick sensor FSR sensor (Force Sensing Resistor, Interlink Electronics) Varatouch MicroPoint sensor The states of the sensor select pins and (SENSEL, SENSEL) indicate which sensor is being used. The name, definition and use of the sensor pins (SEN00-SEN: pins -, 9-,,, 0, -) vary depending on which sensor is being used. Refer to the schematics and pin definitions in this data sheet for specifics. EXTERNAL PS/ PORT The SH provides an external PS/ mouse port. Data from this port is seamlessly merged with data from the embedded sensor. External mice, including those with a mouse wheel, can be hot-plug connected. HOST INTERFACE The SH communicates with the host system using either PS/ or serial. The state of the interface select pin (INTSEL, pin ) determines which interface is used. If the pin is tied to ground, PS/ is used; if it is tied to power (Vcc), serial is used. Copyright Semtech Corporation SH data sheet v.0 (00-0)

4 HULAPOINT & ANALOG These pin descriptions and the schematic on the next page apply to a circuit with he Fujitsu Takamisawa FID- Hall-effect sensor (HulaPoint ) or an analog joystick sensor (like the CTS resistive sensor). With a HulaPoint or analog joystick sensor, the SH supports wait mode and typically consumes less than ma in standby. See also the HulaPoint sensor orientation diagram toward the end of this data sheet. PIN DESCRIPTION NOTES An underscore before a pin mnemonic denotes an active low signal. Pin types legend: P = power AI = analog input I = input O = output I/O = input or output I/O (nd) = input or output with N-channel open drain driver The internal oscillator has a built-in feedback resistor. Only one external component is needed for clock generation. Semtech recommends a.00 MHz ceramic resonator with built-in load capacitors (AVX PBRC-.00BR or equivalent). The button inputs (pins -) have built-in pull-up resistors. No additional components are required. However, if high levels of ESD and EMI are expected, then series protection resistors ( Ohms to K Ohms) are recommended between the switches and the switch inputs on the SH. PINS FOR HULAPOINT & ANALOG JOYSTICK SENSOR CIRCUITS Pin Numbers Mnemonic Pin Type Name and Function Power VDD P Power supply: +V VSS, VSS, P Ground Reset _RESET I Reset: apply 0V for orderly start-up Oscillator OSCIN 9 I Oscillator input: external clock input or one side of the ceramic resonator with built-in load capacitors _OSCOUT 0 O Oscillator output: open for external clock input or one side of the ceramic resonator with built-in load capacitors Host INTSEL I Host interface select: tie to ground for PS/ host, tie to power () for serial host MCLK I/O (nd) Host PS/ clock MDAT/RTS 9 I/O (nd) Host PS/ data / serial ready-to-send TxD O Serial transmit to host: idle high; in serial mode, connect to host RxD; in PS/ mode, leave floating External PS/ EMCLK I/O (nd) External mouse clock: PS/ clock signal from external mouse EMDAT I/O (nd) External mouse data: PS/ data signal from external mouse Select SENSEL-, I Sensor select; for Hulapoint or analog joystick, leave both floating Reference VREF AI Reference voltage for built-in A/D: for HulaPoint sensor, connect to SPWR0 Sensor SEN00- - I/O Switched power drivers; connect together /SWPWR0- SEN0-9, 0 I/O Switched power driver; connect to SWPWR0 /SWPWR- SEN0/YAD AI Y-axis analog to digital converter input SEN0/XAD AI X-axis analog to digital converter input SEN0/_XYSWP I Leave floating for default X, Y axes; connect to ground to swap X and Y axes SEN09/_XINV I Leave floating for default X direction; connect to ground for reversed X direction SEN0/_YINV I Leave floating for default Y direction; connect to ground for reversed Y direction SEN/BCONF 0 I Button configuration: leave floating for standard -button mouse mode, tie to ground for up/down/wheel-mouse mode SEN/_DB I/O (nd) Down button: active low, strobed sampling SEN/_LB I/O (nd) Left button: active low, strobed sampling SEN/_MB/_UB I/O (nd) Middle button: active low, strobed sampling SEN/_RB I/O (nd) Right button: active low, strobed sampling Reserved RSVD Leave floating Copyright Semtech Corporation SH data sheet v.0 (00-0)

5 SCHEMATIC FOR THE SH MOUSECODER WITH ANALOG JOYSTICK SENSOR JP FFCC SW Down SW SW Left Middle/Up SW Right C 0.0uF INTSEL 9 0 SWPWR0 SWPWR SWPWR SWPWR VREF RESET XAD YAD SWPWR SWPWR -Pin LQFP SCLK SH-FG U PSSEL RB MB / UB SENSEL BCONF MDAT LB DB 0 9 J CON C 00 nf VSS VDD OSCIN 9 OSCOUT 0 VSS XYSWP MCLK EMDAT XINV SENSEL YINV EMCLK µf 0 C SH 0 µf 0 00K C R.00 MHz AVX# PBRC-.00BR or eqivalent Y OSCIN _OSCOUT CON J M_CLOCK EXT_M_DATA J CON J CON EXT_M_CLOCK M_DATA SH SH CON RTS CTS INTSEL J SB_PH_K M_CLOCK M_DATA PS/ DATA SHI ELD +V PS/ CLOCK JP SHIELD Mo u n t i n g hol es pf C pf MDIN_SH JP C L uh Copyright Semtech Corporation SH data sheet v.0 (00-0)

6 FSR SENSOR These pin descriptions and the schematic on the next page apply to a circuit with an Interlink Electronics Force Sensing Resistor (FSR ) sensor. With an FSR sensor, the SH supports stop mode and typically consumes less than µa in standby. PIN DESCRIPTION NOTES An underscore before a pin mnemonic denotes an active low signal. Pin types legend: P = power AI = analog input I = input O = output I/O = input or output I/O (nd) = input or output with N-channel open drain driver The internal oscillator has a built-in feedback resistor. Only one external component is needed for clock generation. Semtech recommends a.00 MHz ceramic resonator with built-in load capacitors (AVX PBRC-.00BR or equivalent). The button inputs (pins -) have built-in pull-up resistors. No additional components are required. However, if high levels of ESD and EMI are expected, then series protection resistors ( Ohms to K Ohms) are recommended between the switches and the switch inputs on the SH. PINS FOR FSR SENSOR CIRCUITS Pin Numbers Mnemonic Pin Type Name and Function Power VDD P Power supply: +V VSS, VSS, P Ground Reset _RESET I Reset: apply 0V for orderly start-up Oscillator OSCIN 9 I Oscillator input: external clock input or one side of the ceramic resonator with built-in load capacitors _OSCOUT 0 O Oscillator output: open for external clock input or one side of the ceramic resonator with built-in load capacitors Host INTSEL I Host interface select: tie to ground for PS/ host, tie to power () for serial host MCLK I/O (nd) Host PS/ clock MDAT/RTS 9 I/O (nd) Host PS/ data / serial ready-to-send O Serial transmit to host: idle high; in serial mode, connect to host RxD; in PS/ mode, leave floating External PS/ EMCLK I/O (nd) External mouse clock: PS/ clock signal from external mouse EMDAT I/O (nd) External mouse data: PS/ data signal from external mouse Select SENSEL-, I Sensor select; for FSR sensor, tie SESEL to ground and leave SENSEL floating Reference VREF AI Reference voltage for built-in A/D: for FSR sensor, connect to VDD Sensor SEN00/FSR_E I/O East SEN0/FSR_N I/O North SEN0/FSR_W I/O West SEN0/FSR_S I/O South SEN0, 9,, I/O Reserved, leave floating SEN0-SEN0,, SEN0/TOUCH 0 AI Touch SEN0/SENSE AI Sense SEN/BCONF 0 I Button configuration: leave floating for standard -button mouse mode, tie to ground for up/down/wheel-mouse mode SEN/_DB I/O (nd) Down button: active low, strobed sampling SEN/_LB I/O (nd) Left button: active low, strobed sampling SEN/_MB/_UB I/O (nd) Middle button: active low, strobed sampling SEN/_RB I/O (nd) Right button: active low, strobed sampling Reserved RSVD Reserved, leave floating Copyright Semtech Corporation SH data sheet v.0 (00-0)

7 SCHEMATIC FOR THE SH MOUSECODER WITH FSR SENSOR FSR_E FSR_N FSR_IN FSR_W FSR_S SW Down SW SW Left Middle/Up C.nF R M SW Right VDD R 00K Q NPN R 0K INTSEL 9 0 FSR_N FSR_W FSR_S FSR_E SENSE TOUCH RSVD SCLK PSSEL RB MB / UB LB DB RSVD VREF RESET Pin LQFP SH-FG U SENSEL BCONF MDAT 0 9 J CON VSS SENSEL 0 C µf 0 SH C 00 nf C 0 µf R 00K VDD.00 MHz AVX# PBRC-.00BR or eqivalent OSCIN 9 OSCIN OSCOUT Y 0 _OSCOUT VSS RSVD MCLK M_CLOCK EMDAT EXT_M_DATA RSVD EMCLK RSVD EXT_M_CLOCK M_DATA SH SH CON INTSEL RTS CTS J SB_PH_K M_CLOCK M_DATA PS/ DATA SHIELD +V PS/ CLOCK JP SHIELD Mounting holes pf C pf MDIN_SH JP C L uh Copyright Semtech Corporation SH data sheet v.0 (00-0)

8 SWITCH JOYSTICK SENSOR These pin descriptions and the schematic on the next page apply to a circuit with a switch joystick sensor. With a switch joystick sensor, the SH supports stop mode and typically consumes less than µa in standby. PIN DESCRIPTION NOTES An underscore before a pin mnemonic denotes an active low signal. Pin types legend: P = power AI = analog input I = input O = output I/O = input or output I/O (nd) = input or output with N-channel open drain driver The internal oscillator has a built-in feedback resistor. Only one external component is needed for clock generation. Semtech recommends a.00 MHz ceramic resonator with built-in load capacitors (AVX PBRC-.00BR or equivalent). Direction switched\s and button switches share the same center contact pad. All sensor lines are connected to the SH with no extra parts. PINS FOR SWITCH JOYSTICK SENSOR CIRCUITS Pin Numbers Mnemonic Pin Type Name and Function Power VDD P Power supply: +V VSS, VSS, P Ground Reset _RESET I Reset: apply 0V for orderly start-up Oscillator OSCIN 9 I Oscillator input: external clock input or one side of the ceramic resonator with built-in load capacitors _OSCOUT 0 O Oscillator output: open for external clock input or one side of the ceramic resonator with built-in load capacitors Host _INTSEL I Host interface select: tie to ground for PS/ host, tie to power () for serial host MCLK I/O (nd) Host PS/ clock MDAT/RTS 9 I/O (nd) Host PS/ data / serial ready-to-send TxD O Serial transmit to host: idle high; in serial mode, connect to host RxD; in PS/ mode, leave floating External PS/ EMCLK I/O (nd) External mouse clock: PS/ clock signal from external mouse EMDAT I/O (nd) External mouse data: PS/ data signal from external mouse Select SENSEL-, I Sensor select; for switch sensor, tie both to ground Reference VREF AI Reference voltage for built-in A/D: for switch sensor, connect to VDD Sensor SEN00/BT_N I/O Connect to north contact pad SEN0/BT_NE I/O Connect to northeast contact pad SEN0/BT_E I/O Connect to east contact pad SEN0/BT_SE I/O Connect to southeast contact pad SEN0/BT_S 9 I/O Connect to south contact pad SEN0/BT_SW 0 I/O Connect to southwest contact pad SEN0/BT_W I/O Connect to west contact pad SEN0/BT_NW I/O Connect to northwest contact pad SEN0/ I/O (nd) Connect to center contact pad, works as tap button BT_CENTER SEN09/BT_L I/O (nd) Left button SEN0/BT_R I/O (nd) Right button SEN 0 I Connect to common contact pad /BT_COMMON SEN-,, Reserved, leave floating, Reserved RSVD Leave floating Copyright Semtech Corporation SH data sheet v.0 (00-0)

9 SCHEMATIC FOR THE SH MOUSECODER WITH SWITCH JOYSTICK SENSOR J CON 9 0 J CON INTSEL 9 0 BT_N BT_NE BT_E BT_NW BT_W BT_SW BT_S SCLK PSSEL RSVD RSVD RSVD RSVD BT_SE VREF RESET -Pin LQFP SH-FG U SENSEL MDAT BT_COMMON C µf 0 SH C 00 nf C 0 µf R 00K VSS VDD.00 MHz AVX# PBRC-.00BR or eqivalent OSCIN Y OSCIN 9 OSCOUT 0 OSCOUT VSS BT_CENTER MCLK M_CLOCK EMDAT EXT_M_DATA BT_L BT_R SENSEL EMCLK EXT_M_CLOCK M_DATA SH SH CON INTSEL RTS CTS J SB_PH_K M_CLOCK M_DATA PS/ DATA SHI ELD +V PS/ CLOCK JP SHIELD Mounting holes pf C pf MDIN_SH JP C L uh Copyright Semtech Corporation SH data sheet v.0 (00-0) 9

10 MICROPOINT SENSOR These pin descriptions and the schematic on the next page apply to a circuit with a Varatouch MicroPoint sensor. With a Varatouch MicroPoint sensor, the SH supports stop mode and typically consumes less than µa in standby. PIN DESCRIPTION NOTES An underscore before a pin mnemonic denotes an active low signal. Pin types legend: P = power AI = analog input I = input O = output I/O = input or output I/O (nd) = input or output with N-channel open drain driver The internal oscillator has a built-in feedback resistor. Only one external component is needed for clock generation. Semtech recommends a.00 MHz ceramic resonator with built-in load capacitors (AVX PBRC-.00BR or equivalent). The button inputs (pins -) have built-in pull-up resistors. No additional components are required. However, if high levels of ESD and EMI are expected, then series protection resistors ( Ohms to K Ohms) are recommended between the switches and the switch inputs on the SH. PINS FOR MICROPOINT SENSOR CIRCUITS Pin Numbers Mnemonic Pin Type Name and Function Power VDD P Power supply: +V VSS, VSS, P Ground Reset _RESET I Reset: apply 0V for orderly start-up Oscillator OSCIN 9 I Oscillator input: external clock input or one side of the ceramic resonator with built-in load capacitors _OSCOUT 0 O Oscillator output: open for external clock input or one side of the ceramic resonator with built-in load capacitors Host _INTSEL I Host interface select: tie to ground for PS/ host, tie to power () for serial host MCLK I/O (nd) Host PS/ clock MDAT/RTS 9 I/O (nd) Host PS/ data / serial ready-to-send O Serial transmit to host: idle high; in serial mode, connect to host RxD; in PS/ mode, leave floating External PS/ EMCLK I/O (nd) External mouse clock: PS/ clock signal from external mouse EMDAT I/O (nd) External mouse data: PS/ data signal from external mouse Select SENSEL-, I Sensor select; for MicroPoint sensor, leave SENSEL floating and tie SENSEL to ground Reference VREF AI Reference voltage for built-in A/D: for MicroPoint sensor, connect to VDD Sensor SEN00/SOUTH I/O West SEN0/NORTH I/O South SEN0/EAST I/O North SEN0/RSVD Reserved, leave floating SEN0/ 9 I/O Pull-up driver: connect to Touch and Sense through a PUPDRV 00 KOhm resistor SEN0/TOUCH 0 AI Touch SEN0/SENSE AI Sense SEN0/WEST I/O West SEN0-09, I/O Reserved, leave floating SEN0/SWITCH I/O Switch SEN/BCONF 0 I Button configuration: leave floating for standard -button mouse mode, tie to ground for up/down/wheel-mouse mode SEN/_DB I/O (nd) Down button: active low, strobed sampling SEN/_LB I/O (nd) Left button: active low, strobed sampling SEN/_MB/_UB I/O (nd) Middle button: active low, strobed sampling SEN/_RB I/O (nd) Right button: active low, strobed sampling Reserved RSVD Reserved, leave floating Copyright Semtech Corporation SH data sheet v.0 (00-0) 0

11 SCHEMATIC FOR THE SH MOUSECODER WITH VARATOUCH MICROPOINT SENSOR CON_X CON_X ON BOARD SENSOR PCB JP JP WEST NORTH EAST JOYSTICK SOUTH SWITCH WEST JOYSTIC SWITCH SOUTH NORTH EAST C pf R 00K Down Left Middle/Up Right SW SW SW SW INTSEL MICROPOINT 9 0 SOUTH NORTH EAST WEST SENSE TOUCH PUPDRV SCLK PSSEL RB MB / UB LB DB RSVD VREF RESET -Pin LQFP SH-FG U SENSEL BCONF MDAT 0 9 J CON 0 µf 0 C 00 nf C VSS VDD OSCIN 9 OSCOUT 0 VSS RSVD MCLK EMDAT RSVD SENSEL SWITCH EMCLK SH SH M_DATA EXT_M_CLOCK EXT_M_DATA M_CLOCK _OSCOUT OSCIN.00 MHz AVX# PBRC-.00BR or eqivalent R 00K SH C µf 0 CON RTS CTS INTSEL J SB_PH_K M_CLOCK M_DATA PS/ DATA SHIELD +V PS/CLOCK JP SHIELD Mounting holes pf C JP MDIN_SH C pf L uh Copyright Semtech Corporation SH data sheet v.0 (00-0)

12 SERIAL HARDWARE The TxD and RTS lines are CMOS logic-level signals, suitable for direct connection to the pins of an UART. Interfacing via the RS- port requires an addition of an inverting driver and receiver. SERIAL COMMUNICATION Communication through the serial port is uni-directional at a fixed speed of 00 Baud, N protocol ( data bits, stop bit, no parity check). The host can reset the device at any time by setting the RTS line high. When RTS is set low after a delay of at least 00 ms, the SH responds with two identification characters. The SH s reponse depends on its mode, wheel mode or -button mode, as determined by the state of the button configuration pin (BCONF, pin 0). Wheel mode If the SH is in wheel mode, then when RTS is set low after a delay of at least 00 ms, the SH responds with the two identification characters MZ (0xD, 0xA); they are followed by a zero motion report consisting of the four bytes 0x0, 0x00, 0x00, 0x00, and then by the plug-and-play string: (vvsth\\mouse\pnp0f0a\hulacc) This plug-and-play string is a sequence of ASCII characters with their codes reduced by 0x0. Note that vv represents a -byte version number, and cc is a -byte checksum. For further information, please refer to the Microsoft Plug and Play External COM Device Specification: -button mode If the SH is in -button mode, then when RTS is set low after a delay of at least 00 ms, the SH responds with the two identification characters M (0xD, 0x); they are followed by a zero motion report consisting of the four bytes 0x0, 0x00, 0x00, 0x00, and then by the plugand-play string: (vvsth\\mouse\pnp0f0a\hulacc) This plug-and-play string is a sequence of ASCII characters with their codes reduced by 0x0. Note that vv represents a -byte version number, and cc is a -byte checksum. For further information, please refer to the Microsoft Plug and Play External COM Device Specification: Copyright Semtech Corporation SH data sheet v.0 (00-0)

13 SERIAL COMMUNICATION (CONT D) In wheel mode, data reports are always four bytes long. In -button mode, data reports are four bytes long only if the middle button is depressed or changing state; otherwise, data reports are three bytes long. A data report is sent if motion is detected, or if buttons are pressed or released. X and Y motion is reported relative to the last report sent, in a two s complement form with -bit resolution. Therefore, motion values range from - to +. Z-Z0 is Z-displacement (wheel value), a -bit two s complement value ranging from - to +. SERIAL DATA REPORT Byte b0 X b X: MSB of X Data b Y b Y: MSB of Y Data b Right button status, = depressed b Left button status, = depressed b Always= Byte b0 X0: LSB of X data b X b X b X b X b X b Always=0 Byte b0 Y0: LSB of Y data b Y b Y b Y b Y b Y b Always=0 Byte (wheel mode) b0 Z0: LSB of Z data b Z b Z b Z: MSB of Z data b Middle button status; =depressed b Always=0 b Always=0 Byte (-button mode, only when middle button is depressed or changing state) b0 Always=0 b Always=0 b Always=0 b Always=0 b Always=0 b Middle button status; =depressed b Always=0 Copyright Semtech Corporation SH data sheet v.0 (00-0)

14 PS/ COMMUNICATION At start-up or reset, the SH waits up to 00 milliseconds, then sends 0xAA to the host, followed by a device ID of 0x00. Then the SH sets itself to its default values: incremental stream mode with : scaling, and a report rate of 00 Hz. The SH then disables itself until a command is received from the host. PS/ REPORTS The adjacent list shows the PS/ report formats. In the data report, each of the two position values (X and Y) is expressed as a 9-bit two s complement integer with the most significant bit (the sign bit) stored separately in byte. Z value (wheel or scroll) is expressed as an -bit two s complement integer. If there is an overflow of the accumulator, the maximum positive or negative count is reported and the corresponding overflow bit is set. PS/ ERROR HANDLING For every correct command or parameter received from the host, the SH sends an acknowledge (0xFA). If an invalid command or parameter is received, the SH issues a resend request (0xFE). If an invalid input is again received, the device transmits an error code (0xFC) to the host. Both error and resend request responses are sent by the device within milliseconds. The host may not issue any new commands until either the SH has responded or milliseconds have elapsed. PS/ DATA REPORT Byte b0 Left Button status = depressed b Right Button Status = depressed b Middle Button Status = depressed b Reserved Always = b X: MSB of X data, sign bit = negative b Y: MSB of Y data, sign bit = negative b X data overflow = overflow b Y data overflow = overflow Byte b0 X0: LSB of X data b X b X b X b X b X b X b X Byte b0 Y0: LSB of Y data b Y b Y b Y b Y b Y b Y b Y Byte (for wheel function; sent only if output of Z data is enabled by the driver) b0 Z0: LSB of Z data b Z b Z b Z b Z b Z b Z b Z: MSB or Z data, sign bit PS/ STATUS REPORT Byte b0 Right button = depressed b Middle button = depressed b Left button = depressed b Reserved Always = 0 b Scaling - : (0) / : () b Disable - (0) / enable () b Stream - (0) / prompt () mode b Always = 0 Byte b0 - Current resolution setting b - Always = 0 Byte b0- Current sampling rate Copyright Semtech Corporation SH data sheet v.0 (00-0)

15 COMMANDS FROM PS/ HOST The Set Default Status Command (0xF) re-initializes the device to its condition at power-up. When the Reset Command (0xFF) is received, the SH sets the following default parameters: incremental stream mode, : scaling, report rate of 00 Hz, and disabled. It then sends 0xAA to the host followed by a device ID of 0x00. The host sends the Resend Last Data Stream Command (0xFE) when it detects an error in any SH transmission. The device then resends the last output data packet to the host. This transmission occurs after a SH transmission, and before the host enables the interface allowing the next SH output. The Disable Command (0xF) stops the device from transmitting all reports. However, the mode does not change; the SH is still able to respond to commands. If the disable command is issued while the device is transmitting a report, the SH immediately stops the transmission and disables itself. The Reset Echo Mode Command (0xEC) returns the device to its previous mode, and is disabled. The Set Prompt (Remote) Mode Command (0xF0) sets the device to Prompt Mode. Data values are then only reported in response to a Read Report Command (0xEB). If the Set Echo Mode Command (0xEE) is received, the SH immediately returns any data bytes except 0xFF or 0xEC. If the SH is in incremental stream mode, the Enable Command (0xF) allows it to begin data transmission. If the device is in prompt mode, the enable command only updates the internal status of the SH. The SH responds to the Set Sampling Rate Command (0xF) in both stream and prompt modes but only updates its internal status if this command is enacted while the device is in stream mode. The SH responds to the Read Device Type Command (0xF) with the device ID of 0x00. The Read Report Command (0xEB) prompts the SH for a report. The report occurs even if the device has not moved or if the status of the switches did not change. The Set Incremental Stream Mode Command (0xEA) sets the SH to stream mode and disables the device. The Status Request Command (0xE9) returns a -byte status report. The Set Resolution Command (0xE) controls resolution, the Set : Scaling Command (0xE) enables a coarse/fine tracking response, and the Set : Scaling Command (0xE) enables the values of movements to be transmitted to the host without any scaling. Due to Semtech s advanced motion algorithm, set resolution and scaling commands are acknowledged and reported as activated, but their contents are ignored. Copyright Semtech Corporation SH data sheet v.0 (00-0)

16 HULAPOINT SENSOR ORIENTATION The SH has three pins that determine sensor orientation- X-invert (XINV, pin ), Y-invert (YINV, pin ), and XY swap (XYSWP, pin )- allowing eight orientation schemes. The diagrams below show two of these orientation schemes, using the HulaPoint Fujitsu Takamisawa Hall-effect sensor (FID-). Default sensor orientation Sensor orientation with both X and Y directions inverted Copyright Semtech Corporation SH data sheet v.0 (00-0)

17 MECHANICALS FOR THE SH MOUSECODER HD D e F b y E HE L 9 A e A A b I Detail F MD L c ME Symbol Dimension in Millimeters Min Nom Max A. A A. b c D.9.0. E.9.0. e 0. HD HE L L.0 y 0ϒ 0. 0ϒ b 0. I.0 MD. ME. Recommended PCB Footprint Copyright Semtech Corporation SH data sheet v.0 (00-0)

18 ELECTRICAL SPECIFICATIONS FOR THE SH MOUSECODER Absolute maximum ratings Ratings Symbol Value Unit Supply voltage VDD -0. to.0 V Input voltage VIN VSS -0. to VDD +0. V Current drain per pin I 0 ma (not including VSS or VDD) Operating temperature TA TLOW to THIGH C SH -0 to + C Storage temperature range TSTG -0 to + C ESD rating (human body model) VESD.0 kv DC electrical characteristics, temperature range = TLOW to THIGH unless otherwise noted) Characteristic Symbol Min Typ Max Unit Supply voltage..0. V Output voltage (0 µa load) VOH VDD 0. V VOL 0. Input high voltage VIH 0.VDD VDD V Input low voltage VIL VSS 0.VDD V Input current IIN +/- µa Supply current (VDD=.0 VDC+/-0%, VSS=0) IDD.0 TBD ma Control timing (VDD =.0 VDC +/-0%, VSS = 0 VDC, temperature range = TLOW to THIGH unless otherwise noted) Characteristic Symbol Min Typ Max Unit Frequency of operation Crystal option fosc.0 MHz External clock option fosc.0 MHz Copyright Semtech Corporation SH data sheet v.0 (00-0)

19 This Page Left Intentionally Blank Copyright Semtech Corporation SH data sheet v.0 (00-0) 9

20 For sales information and product literature, contact: Semtech Corporation Human Interface Device (HID) and System Management Division 00 Flynn Road Camarillo, CA (0)9- Telephone (0)9-0 Fax Copyright Semtech Corporation. All rights reserved. Semtech, the Semtech logo, MouseCoder, and HulaPoint are marks of Semtech Corporation. Force Sensing Resistor and FSR are marks of Interlink Electronics, Inc. MicroPoint is a mark of Varatouch Technology, Inc. All other marks belong to their respective owners. LIMITED LICENSE GRANTED: NO WARRANTIES MADE This specification is provided "as is" with no warranties whatsoever including any warranty of merchantability, fitness for any particular purpose, or any warranty otherwise arising out of any proposal, specification or sample. Any suggestions or comments by Semtech concerning use of this product are opinion only, and Semtech makes no warranty as to results to be obtained in any specific application. A license is hereby granted to reproduce and distribute this specification for internal use only. No other license, expressed or implied to any other intellectual property rights is granted or intended hereby. Authors of this specification disclaim any liability, including liability for infringement of proprietary rights, relating to the implementation of information in this specification. Authors of this specification also do not warrant or represent that such implementation(s) will not infringe such rights. Copyright Semtech Corporation SH data sheet v.0 (00-0) 0