S Both I2C and SPI Interfaces Provided to Control the MAX9451. S Proven PCB Layout S Windows 98SE/2000/XP-Compatible Evaluation Software

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1 9-580; Rev 0; /0 MAX945 Evaluation Kit General Description The MAX945 evaluation kit (EV kit) is a fully assembled and tested PCB that demonstrates the performance of the MAX945 high-precision clock generator for timing in SONET/SDH systems or Gigabit Ethernet systems. The EV kit is installed with a 55.5MHz crystal. For evaluating other frequencies, remove and replace the Y crystal with a target crystal. The MAX945 EV kit includes WindowsM 98SE/000 and Windows XPM-compatible operating system software that provides a simple GUI for exercising the MAX945 features. The EV kit comes with the MAX945EHJ installed. Windows and Windows XP are registered trademarks of Microsoft Corp. SPI is a trademark of Motorola, Inc. Features S Both IC and SPI Interfaces Provided to Control the MAX945 S Proven PCB Layout S Windows 98SE/000/XP-Compatible Evaluation Software S Convenient Configuration Jumpers and Test Points S USB-PC Connection PART MAX945EVKIT+ Ordering Information +Denotes lead(pb)-free and RoHS compliant. TYPE EV Kit Component List DESIGNATION QTY DESCRIPTION C, C, C0, C C5, C6, C- C5, C C9, C7 C7, C8, C0, C7, C8, C C9 C, C C4 C5, C6 0FF Q0%, 0V X5R ceramic capacitors (0805) Murata GRMBR6A06K or TDK C0X5RA06K or equivalent 0.FF Q0%, 6V X7R ceramic capacitors (060) TDK C608X7RC04K Not installed, ceramic capacitors (060) 0.0FF Q0%, 6V X7R ceramic capacitor (060) Murata GRM88R7C0K pf Q5%, 50V C0G ceramic capacitors (060) TDK C608C0GH0J or Murata GRM885CH0J or equivalent 0.0FF Q0%, 5V X7R ceramic capacitor (060) TDK C608X7REK or equivalent 0pF Q5%, 50V C0G ceramic capacitors (060) Murata GRM885CH00J or TDK C608C0GH00J or equivalent DESIGNATION QTY DESCRIPTION D D FB INT, LOCK, SDA, SCL, GND,, Q 7 J J8 8 J9 J0 0 Red LED (060) Lite-On LTST-C90CKT Green LED (060) Lite-On LTST-C90GKT Ferrite bead TDK MPZ608S0A JU JU0 0 -pin headers JU, JU4 -pin headers Test points (red) Keystone Electronics 5000 or equivalent connectors, edge mount Johnson USB type B, right-angle PC mount receptacle Not installed, vertical header, x 5 pins R 00kI single-turn potentiometer R, R0 0kI Q% resistor (060) R4, R0, R, R4 R6, R8, R6, R, R4, R5 4 50I Q5% resistor (060) 6 00I Q5% resistors (060) Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim Direct at , or visit Maxim s website at

2 MAX945 Evaluation Kit DESIGNATION QTY DESCRIPTION R, R4, R7, R 4 5I Q5% resistors (060) R8, R9 4.7kI Q5% resistors (060) R5, R6 7I Q5% resistors (060) R7 470I Q5% resistor (060) R8.5kI Q5% resistor (060) R9.kI Q5% resistor (060) R, R 0I Q5% resistors (060) R 00kI Q5% resistor (060) U U U U4 High-precision clock generator ( TQFP-EP*) Maxim MAX945EHJ+ Microcontroller (68 QFN) Maxim MAXQ000-RAX+ LDO regulator (5 SC70) Maxim MAX85EXK5+ USB-UART converter FTDI FTBL Component List (continued) DESIGNATION QTY DESCRIPTION U5 Y Y 0 Y Y4 5 Shunts +Denotes a lead(pb)-free/rohs-compliant package. *EP = Exposed pad. 9C46 type -wire EEPROM Atmel AT9C46A-0SU-.7 5MHz crystal, fundamental mode, loading capacitance 8pF, motional capacitance > 6pF KDS America DSXS-5.00M- 8pF-0-0 Not installed, high-stability fundamental crystal 6MHz crystal Citizen HCM MABJ-UT 6MHz crystal Citizen HCM MABJ-UT PCB: MAX945 EVALUATION KIT+, REV C Component Suppliers SUPPLIER PHONE WEBSITE Murata Mfg. Co., Ltd TDK Corp Note: Indicate that you are using the MAX945 when contacting these component suppliers. FILE INSTALL.EXE MAX9450.EXE FTDXX.INF UNINST.INI TROUBLESHOOTING_USB.PDF MAX945 EV Kit Files DESCRIPTION Installs the EV kit files on your computer Application program USB device driver file Uninstalls the EV kit software USB driver installation help file Quick Start Recommended Equipment One.V DC power supply One 8kHz to 500MHz function generator that can generate 5.65MHz (Q0ppm) square wave One -channel 00MHz oscilloscope One digital voltmeter (DVM) One USB cable A user-supplied PC running Windows 98SE/000/XP OS with a spare USB port

3 MAX945 Evaluation Kit Note: In the following sections, software-related items are identified by bolding. Text in bold refers to items directly from the EV kit software. Text in bold and underlined refers to items from the Windows 98SE/000/XP operating system. Procedure The MAX945 EV kit is fully assembled and tested. Follow the steps below to verify board operation. Caution: Do not turn on the power supply until all connections are completed. ) Visit the Maxim website ( evkitsoftware) to download the most recent version of the EV kit software, 9450Rxx.ZIP. ) Install the MAX9450 EV kit software on your computer by running the INSTALL.EXE program. The program files are copied and icons are created in the Windows Start menu. ) Verify that all jumpers are in default positions, as described in Table. 4) Connect the function-generator output to connector IN0+, then connect jumper JU. Adjust the signal swing from 0 to.v, square-wave frequency to 5.65MHz, and duty cycle to 50%. Use scope to verify. 5) Leave connector IN+ unconnected and connect jumper JU4. 6) Connect connector CLK0+ to the oscilloscope channel- input. 7) Connect connector CLK+ to the oscilloscope channel- input. 8) Connect the USB cable from the PC to the MAX945 EV kit board. 9) Unless installed previously, a Building Driver Database window pops up in addition to a New Hardware Found message. If you do not see a window similar to the one described above after 0 seconds and the device is not functional, remove the USB cable from the MAX945 EV kit board and reconnect it. Administrator privileges are required to install the USB device driver on Windows 000/XP. Refer to the TROUBLESHOOTING_USB.PDF document included with the software if you have trouble during this step. 0) Follow the directions of the Add New Hardware Wizard to install the USB device driver. Choose the Search for the Best Driver for your Device option. Specify the location of the device driver as C:\Program Files\MAX9450 (default installation directory) using the Browse button. ) Connect the.v DC power supply on the MAX945 EV kit, Q, and GND pads. ) Turn on the.v DC power supply. Enable the output of the function generator. ) Start the MAX9450 EV kit software by opening its icon in the Start menu. A small window appears, as shown in Figure. 4) The IC button allows you to evaluate the MAX945 in IC control mode. The SPI button allows you to evaluate the MAX945 in SPI control mode. Click the IC button. A small notification window appears, as shown in Figure. 5) Follow the instructions on the window and click OK. The main software window appears, as shown in Figure. 6) Verify that the status bar reads MAX9450 EVKIT found and IC Address Setting is 0xD0. 7) In the M Divider ( - 768) text field, type in 8 and click the Set button. 8) Verify that the waveforms on oscilloscope channel- and channel- are 55.5MHz. 9) Use the DVM to verify that test point LOCK on the EV kit board is in a logic-low state.

4 MAX945 Evaluation Kit Table. Jumper Settings JUMPER JU JU JU JU4 JU5 JU6 JU7, JU8 JU9 JU0 SHUNT POSITION -* Input clock IN0 activated (when CR5[:] = 00) - Input clock IN0 disabled (when CR5[:] = 00) -* Input clock IN activated (when CR5[:] = 00) - Input clock IN disabled (when CR5[:] = 00) -* Normal operation - Master reset DESCRIPTION -* I C control mode. Connect MAX945 pin to ground. - SPI control mode. Connect MAX945 pin to interface CS signal. -* I C control mode. Connect MAX945 pin to interface SCL signal. - SPI control mode. Connect MAX945 pin to interface SCLK signal. -* I C control mode. Connect MAX945 pin to interface SDA signal. - SPI control mode. Connect MAX945 pin to interface MOSI signal. -* I C slave address is 0xD0 Other See Table for AD0 and AD configurations -* Enable input clock monitor - Disable input clock monitor -* Enable clock output - Disable clock output JU Open JU pins - for testing purpose only JU Open JU pins - for testing purpose only JU JU4 Open Input clock IN0 uses differential signaling -* Input clock IN0 uses single-ended signaling Open Input clock IN uses differential signaling -* Input clock IN uses single-ended signaling *Default position. 4

5 MAX945 Evaluation Kit Figure. MAX9450 EV Kit Software Interface Selection Window Figure. MAX9450 EV Kit Software I C Interface Notification Window Figure. MAX9450 EV Kit Software IC Interface Tab 5

6 MAX945 Evaluation Kit Detailed Description of Software IC Interface Tab On the IC Interface tab, a user sets the divider registers (i.e., M, P, N0, and N). The output frequency at CLKn (n = 0, ) is determined by the reference clock and dividing factors M, Ni (i = 0, ), and P, as shown in the following equation: M fclkn = fref Ni P Control registers CR5 and CR6 are set in the Control Register Setting box. Chip status CR7 can be monitored by clicking the Read button in the Chip Status box. Checking the Auto Read checkbox makes the software read the chip status approximately once every second. SPI Interface Tab The SPI Interface tab (Figure 4) has the same function as the IC Interface tab. A user can set the divider registers (i.e., M, P, N0, and N) and control registers CR5 and CR6 as well, but chip status CR7 is not accessible in SPI control mode. IC Address Setting The MAX945 IC slave addresses are hardwareprogrammable by configuring jumpers JU7 and JU8, Figure 4. MAX9450 EV Kit Software SPI Interface Tab 6

7 MAX945 Evaluation Kit as shown in Table. This configuration provides eight selectable addresses for the MAX945, allowing eight devices to be connected to one master. Once jumpers JU7 and JU8 are changed, the user should change the IC Address Setting dropdown menu on the right side of the software window to match the correct address. Manually Sending IC or SPI Commands In addition to the controls on the main window, the MAX9450 EV kit software allows the IC or SPI commands to be entered manually. To bring up the Maxim Command Module Interface window (see Figure 5), click the Diagnose button. Enter the device address (0xD0 0xDE) under Target Device Address, or click the Hunt for active listeners button to automatically find the IC address. Under the General Commands tab, select - SMBusWriteByte(addr,cmd,data8). At Command byte: enter the register address, and at Data Out: enter the data byte to write to the register. Note that the byte can be entered in hexadecimal prefixed with 0x or in binary with no prefix. Similar operations can be done in SPI control mode using the -wire interface tab. Table. IC Address Setting by AD0 and AD JU7 (AD0) JU8 (AD) ADDRESS - (Low) - (Low) 0 000x - (Low) Open 0 00x - (Low) - (High) 0 00x Open - (Low) 0 0x Open Open 0 00x Open - (High) 0 0x - (High) - (Low) 0 0x - (High) Open 0 x - (High) - (High) Convert to SPI Figure 5. MAX9450 EV Kit Software Maxim Command Module Interface Window 7

8 MAX945 Evaluation Kit Detailed Description of Hardware The MAX945 (U) is a high-precision clock generator. The digital power supply is ; the clock output power supply is Q. Both operate from.4v to.6v. The device registers are controlled through an IC or SPI interface. On the left portion of the EV kit PCB, IC and SPI interfaces are provided. The MAXQ000 microcontroller (U) generates both IC and SPI control signals. A PC communicates with the microcontroller through a USB-UART converter. connectors are provided for the clock input and output connections. If clock input signals are differential, leave JU or JU4 open. If clock input signals are single-ended, connect the input clock signal to IN0+ or IN+, and place a shunt on JU or JU4. Evaluating Other Frequencies The EV kit is installed with a 5MHz crystal. For evaluating other frequencies, remove and replace the Y crystal with a target crystal. For details, refer to Application Note 90: Component Selection and Performance Test for the MAX945x High-Precision CLK Generators. Clock Monitor Functions To test the features of the clock monitor, apply the same frequency at the input IN0+ to the input IN+ and connect jumper JU4. To avoid using two clock generators, use a T connector to split the input clock in two for IN0+ and IN+. In such a case, you may need to increase the clock signal swing to compensate the increase on the load. Reset the clock monitor by connecting the shunt on jumper JU9 in the - position and then back to the - position. Once the clock monitor is reset, it is ready to test the monitor functions, such as the clock-condition monitoring, input swapping, revert function, and holdover function. Clicking the Read button in the programming window provides status of the chip. After INT goes high, resetting the clock monitor as described above also resets INT. 8

9 MAX945 Evaluation Kit Y OPEN LOCK SEL0 SEL 4 IN0+ 5 IN0-6 C6 C9 0.0µF R 0kΩ % RJ GNDA LP LP A X X C5 C7 OPEN Y 5MHz C8 OPEN C Q CLK+ GND CLK0+ 8 IN- CLK- CLK Q Q C 7 IN+ INT MR GND/CS SCL SDA AD0 AD CMON Q OE 8 7 C4 IN- IN0- J J J J4 R 5Ω R4 5Ω R7 5Ω R 5Ω JU JU4 R4 00Ω R5 00Ω IN- IN0- JU JU LOCK C5 LOCK R 00kΩ R 00kΩ U MAX945 C0 OPEN C7 OPEN C8 OPEN R8 00Ω R6 00Ω R6 00Ω R4 50Ω R0 50Ω R 50Ω J5 J6 J7 Q C 0µF C 0µF Q GND INT C OPEN R 00Ω R4 50Ω J8 SCL SDA INT CS SCLK MOSI JU JU4 JU5 JU6 JU7 JU8 JU9 JU0 SCL R8 4.7kΩ SDA R9 4.7kΩ Figure 6a. MAX945 EV Kit Schematic (Sheet of ) 9

10 MAX945 Evaluation Kit C9 VCPU 49 SEG/P. SEG/P.4 SEG/P.5 4 SEG4/P.6 HFXOUT 5 SEG5/P.7 48 P6.5/T0/WKOUT 6 SEG6/P.0 CTS 7 SEG7/P. 8 SEG8/P. 9 SEG9/P. 0 SEG0/P.4 SEG/P.5 SEG/P.6 SEG/P.7 4 SEG4/P.0 5 SEG5/P. 6 SEG6/P. 7 SEG7/P. Y4 6MHz TCK TDI TMS TDO RESET 8 SEG8/P.4/INT4 9 SEG9/P.5/INT5 0 SEG0/P.6/INT6 SEG/P.7/INT7 SEG SEG/COM 4 SEG4/COM 5 SEG5/COM 6 COM0 9 P4.0/TCK/INTB 8 GND 0 P4./TDI/INT9 P4./TMS P4./TDO 4 GND IO HFXIN P6.4/T0B/WKOUT0 P6./T/OW_IN P6./TB/OW_OUT P6./T/INT P6.0/TB/INT P5.7/MISO P5.6/SCLK P5.5/MOSI P5.4/SS P5./TX/INT P5./RX/INT0 KIN KOUT VCPU C7 DSR SDA SCL SCLK MOSI CS DTR RTS C5 0pF C6 0pF RESET SEG0/P. SEG9/P. SEG8/P.0 SEG7/P0.7/INT SEG6/P0.6/INT SEG5/P0.5/INT SEG4/P0.4/INT0 SEG/P0. SEG/P0. SEG/P0. SEG0/P0.0 VADJ VLCD VLCD VLCD P7./RXO/INT5 P7.0/TXO/INT SLEEP INT LOCK TXD RXD J9 USB J9- J9- J9- J9-4 C6 VUSB C7 R5 7Ω R6 7Ω VCC U5 AT9C46A CS ORG SK N.C. D GND D0 FB R0 0kΩ C 0µF R9.kΩ C4 0.0µF R8.5kΩ VUSB C pf C pf R7 470Ω C 7 Y 6MHz 8 VUSB C8 IN U MAX85 OUT C C4 SHDN GND VCPU C5 0 6 AVCC VCC VCC VCCIO 5 VOUT TXD TXD 4 USBDM RXD RXD USBDP RTS RTS CTS CTS RSTOUT U4 FTBL DTR DTR RESET 0 DSR DSR XTIN XTOUT DCD TXDEN TXLED RXLED RI R 0Ω EECS EESK PWRCTL PWREN 4 5 R 0Ω 0 SLEEP SLEEP EEDATA TEST AGND GND GND 9 7 VCPU D GREEN D RED C0 0µF VCPU U MAXQ000 VCPU TCK TDO J0- J0- J0-4 J0-8 TMS J0-5 J0-6 RESET J0-7 J0- TDI J0-9 J Figure 6b. MAX945 EV Kit Schematic (Sheet of ) 0

11 MAX945 Evaluation Kit Figure 7. MAX945 EV Kit Component Placement Guide Component Side

12 MAX945 Evaluation Kit Figure 8. MAX945 EV Kit PCB Layout Component Side

13 MAX945 Evaluation Kit Figure 9. MAX945 EV Kit PCB Layout Ground Plane

14 MAX945 Evaluation Kit Figure 0. MAX945 EV Kit PCB Layout Power Plane 4

15 MAX945 Evaluation Kit Figure. MAX945 EV Kit PCB Layout Solder Side Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 0 San Gabriel Drive, Sunnyvale, CA Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc.