ft6188 SPI- Controlled Dual SIM Card Controller GENERAL DESCRIPTION FEATURES APPLICATIONS APPLICATION CIRCUIT

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ft688 SPI- Controlled Dual SIM Card Controller GENERAL DESCRIPTION The ft688 is a SIM card controller specifically designed for dual SIM card enabled mobile phones. It supports both.8 and.

1 ft688 SPI- Controlled Dual SIM Card Controller GENERAL DESCRIPTION The ft688 is a SIM card controller specifically designed for dual SIM card enabled mobile phones. It supports both.8 and. SIM cards with integrated LDOs and level shifters. A Serial Port Interface (SPI) is used to configure and control the both cards. The ft688 works as a SIM card switch to bring cards to operation in turns at specified intervals. The device adopts a break-before-make scheme, i.e., to break the connection with a card before getting connected with the other so as to avoid possible communication collision. The ft688 SPI control interface is designed to communicate with microprocessors or controllers, such as cell phone baseband chips. The three-wire interface provides easy access with the universal data communication standards and saves the GPIO pins. The ft688 is available in QFNX-2L package. FEATURES Supply range: 2.7 to 5.5 Integrated LDOs and level shifters BAT shutdown current:.μa Independent.8/ CC control for each SIM card Independent clock stop mode for each SIM card Maximum output current: ma (typical) Turn-on time:.8ms (typical);.5ms (max.) Available in QFNX-2L package APPLICATIONS Mobile phones Dual SIM card mobile phones APPLICATION CIRCUIT Figure : Typical Application Circuit August 2

2 PIN CONFIGURATION AND DESCRIPTION ft688 Figure 2: PIN Assignment (TOP IEW) SYMBOL QFNX-2L DESCRIPTION SIM2 SIM2 supply IO 2 Digital IO supply BAT Battery input voltage SIM 4 SIM supply SCLK 5 Level-shifted SIM clock output SRST 6 Level-shifted SIM reset output SIO 7 Level-shifted SIM bidirectional data input/output SIMIO 8 Non-level-shifted bidirectional data I/O SIMRST 9 Non-level-shifted SIM reset input, internal pull high to IO SIMCLK Non-level-shifted SIM clock input NC /SYSRSTB 2 Active low system reset SPICS Serial bus selection SPICK 4 Serial bus clock SPIDATA 5 Serial bus data NC 6 REF 7 Reference voltage output SIO2 8 Level-shifted SIM2 bidirectional data input/output SRST2 9 Level-shifted SIM2 reset output SCLK2 2 Level-shifted SIM2 clock output GND 2 Ground ORDERING INFORMATION PART NUMBER TEMPERATURE RANGE PACKAGE PACK QTY ft C to +85 C QFNX-2 5, units/reel August 2 2

3 ft688 ABSOLUTE MAXIMUM RATINGS PARAMETER ALUE Supply voltage ( BAT) -. to 6. All other pins relative to GND -. to BAT+. Storage temperature (TSTG) -65 C to +5 C Maximum junction temperature +5 C Note: Stresses beyond those listed under absolute maximun ratings may cause permanent damage to the device. These are stress ratings only,and functional operation of the device at these or any other conditions beyond those indicated under recommended operating conditions is not implied.exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. RECOMMENDED OPERATING CONDITIONS PARAMETER ALUE Supply voltage ( BAT) 2.7 to 5.5 Operating temperature (T A) -25 C to +85 C August 2

4 ELECTRICAL CHARACTERISTICS ft688 Note: The following electrical characteristics state DC and AC electrical specifications under particular test conditions which guarantee specific performance limits. But note that specifications are not guaranteed for parameters where no limit is given. The typical value however, is a good indication of device performance. BAT=.6, C REF=C SIM=C SIM2=μF, T A=25, unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS INPUT POWER SUPPLY BAT Battery supply voltage I BAT_SD I BAT Battery supply shutdown current Battery supply operating current IO =. μa SIM =., SIM2 =, no load SIM =.8, SIM2 =, no load 7 μa IO Device supply voltage 2.6. I IO_SD I IO SPI INPUT Device supply shutdown current Device supply operating current IL Input level low SPIDATA, SPICK, SPICS, SYSRST IH Input level high SPIDATA, SPICK, SPICS, SYSRST SIM CARD SUPPLY.85* IO. μa μa.8 output voltage output voltage I SHORT Output short current limit ma t ON GSM INTERFACE SIMCLK_IH SIMRST_IH SIMCLK_IL SIMRST_IL Load regulation (.8) Load regulation (.) Turn on time SIMCLK, SIMRST input level high SIMCLK, SIMRST input level low.5ma < ILOAD < BAT =.6.5mA < ILOAD < BAT =.6 No load. Enable SIM,2 at 9% specified voltage IO -.6.5* IO m.7 m.8.5 ms.6 SIMIO_IL SIMIO input level low OL.4, IOL = ma.2 SIMIO_IH SIMIO_OH SIMIO input and output level high OL.4, IOL = ma.5 IIH, IOH = ± 2μA I SIMIO_IL SIMIO input low current IL = -.9 ma SIMIO_OL SIMIO output low level IL =.4.42 IO -.6 INTERFACE TO SIM CARD SRST_OL SRST_OH SCLK_OL SCLK_OH SRST output low level SRST output high level SCLK output low level SCLK output high level Sink current = -2μA (SIMRST =.6) Source surrent = 2μA (SIMSRT = IO -.6 Sink current = -2μA (SIMCLK =.6) Source surrent = 2μA (SIMCLK = IO -.6.9* SIM.9* SIM.4.4 August 2 4

5 ft688 SIO_IL SIO input low level.5* SIM SIO_IH SIO_OH SIO input high level, SIO output high level Source current = 2μA SIM -.4 I SIO_IL SIO input low level current SIO = - ma SIO_OL SIO output low level Sink current = -ma ( SIMIO = ).5* SIM INTERFACE TO.8 SIM CARD SRST_OL SRST output low level Sink current = -2μA (SIMRST =.6).2* SIM SRST_OH SRST output high level Source surrent = 2μA (SIMSRT = IO -.6.9* SIM SCLK_OL SCLK output low level Sink current = -2μA ( SIMCLK =.6).2* SIM SCLK_OH SCLK output high level Source surrent = 2μA (SIMCLK = IO -.6.9* SIM SIO_IL SIO input low level.5* SIM SIO_IH SIO_OH SIO input high level, SIO output high level Source current = 2μA SIM -.4 I SIO_IL SIO input low level current SIO = - ma SIO_OL SIO output low level Sink current = -ma ( SIMIO = ) SIM CARD INTERFACE TIMING t SRST t SIO t SCLK SRST, SIO rise/fall time SCLK rise/fall time SIM = and.8, loaded with pf (%~ 9%) SIM =, loaded with pf (%~ 9%) SIM =.8, loaded with pf (%~ 9%).5* SIM μs 8 ns 5 ns f SIMCLK SCLK frequency 5 MHz SCLK duty cycle SIMCLK duty = 5%, f SIMCLK = 5MHz 47 5 % SCLK propagation delay From SIMCLK to SCLK 25 5 ns SERIAL PORT INTERFACE (SPI) The Serial Port Interface (SPI) of the ft688 is for receive commands from the microcontroller, or baseband chip in mobile phone. The SPI is an 8-bit wide interface with bits allocated for address information and the 5 for data contents. Three pins, SPICS, SPIDATA, and SPICK, are used for chip select, data transmission and clock input respectively. Timings of the ft688 SPI interface are illustrated in the Figure. When SPI is set idle, the SPICS pin is pulled high and SPICK is pulled low. When SPI is enabled to write to the device, SPICS is pulled low and remains low during the whole course of data transmission. When 8-bit data write is complete, the SPICS is again pulled high. August 2 5

6 ft688 Figure : SPI Interface Date Transmission Timings Figure 4: SPI Interface Timing Diagram SERIAL PORT INTERFACE TIMING SYMBOL PARAMETER MIN TYP MAX UNIT Ts SPIDATA to SPICK setup time 4 ns Th SPIDATA to SPICK hold time 4 ns REGISTER DEFINITIONS Name: Reset Control Register H Description: The LSB of these two signals is for SIM card; the MSB is for SIM card Reserved - Control the value of SIM card RST pin. alid only when CCEN and RSTSEL are set to. RSTAL WO 2 = Force the SIM card RST pin to. = Force the SIM card RST pin to. SIM card RST pin control. alid only when CCN is set to. RSTSEL WO = The RST pin of the SIM card is the same with SIMRST input. = The RST pin of the SIM card is controlled by SRTAL August 2 6

7 Name: Clock Control Register H ft688 Description: The LSB of these two signals is for SIM card, and MSB is for SIM card2. The value of SIM card CLK pin is controlled by the combination of the two signals when CCEN is. 4 - Reserved - Bit and 2 are for SIM card ; bit and are for SIM card 2. CPOH WO CPOH =, CPOL =: the CLK pin of the SIM card is the same as the SIMCLK 2 pin. CPOH =, CPOL =: force the SIM card CLK pin to stop at high. CPOL WO CPOH =, CPOL =: force the SIM card CLK pin to stop at low CPOH =, CPOL =: Not allowed Name: Data Control Register 2H Description: The LSB of these two signals is for SIM card, and MSB is for SIM card Reserved - Control the value of SIM card DATA pin, only valid when both CCEN and DATAEN are. DATA_L WO 2 = normal function. = Force the SIM card DATA pin to. SIM card DATA pin control, only valid when CCEN is. = the channel between SIM card DATA pin and ft688 I/O pin SIMDATA will be gapped. If there were no drivers of these two pins, DATAEN WO then they will be pulled high. = The channel between SIM card DATA pin and ft688 I/O pin SIMDATA will be opened. If there were no drivers of these two pins, then they will be pulled high. Name: CC Control Register H Description: The LSB of these two signals is for SIM card, and MSB is for SIM card Reserved - SIM card power control.. CCEN WO = Turn off SIM card CC pin, all signals to SIM card will be. 2 = Turn on SIM card CC pin. Choose the supply voltage level of SIM card. SEL WO = Supply voltage is.8. = Supply voltage is. Name: LDO Reference Selection 4H LDO reference selection 4 REFSEL WO = IO = Bandgap Reserved - August 2 7

8 Name: Bandgap Control Register 5H ft688 Embedded bandgap enable 4 BG_EN WO = disable = enable - Bandgap T.C. fine turning. = initial setting 2 = plus 2 step RBGSEL WO = minus step = plus step - - Reserved - SIGNAL PROCESSING BLOCKS The main function of this block is to handle the command ordered by baseband processor about SCLK and SRST. When it receives commands sent by SPI, it will do the corresponding signal processing, and then sent the results to analog blocks. The commands is transmitted through serial port interface (SPI) and stored in the register set. Signal processing blocks will process signals with corresponding commands. The truth table of SCLK and SRST is shown in the following tables. SIM CPOH CPOL SIMCLK SCLK Not allowed Not allowed Table. Truth table of SCLK August 2 8

9 ft688 SIM RSTSEL RSETAL SIMRST SRST Table 2. Truth table of SRST It will be noticed that the effect of those controlled signal may not be valid immediately due to the delay of some processing time. ANALOG BLOCKS This module contains SIM LDO, level shifter and bandgap function. It will accept the command set by SPI and also transfer the signals to suitable voltage level to SIM cards. The SIM LDO is a regulator that could source ma (max) with.8 or. output voltage selection based on the supply specs of subscriber identity modules (SIM) card. SIM CARD INTERFACE The SIM card interface circuitry of ft688 meets all ETSI and IMT-2 SIM interface requirements. It provides level shifting needs for low voltage GSM controller to communicate with either.8 or SIM cards. All SIM cards contain a clock input, a reset input, and a bi-directional data input/output. CARD ACTIATION AND DEACTIATION The role of ft688 at card activation and deactivation is just a signal bypasser. It will bypass SIMCLK and SIMRST transmitted by baseband processor and turn on the channel between SIMIO and SIO. When card is activated, user just needs to follow the steps listed below. and processor to start activation sequence. Similarly, when card is deactivated, user just follows the steps listed below. isters just keep their default settings. August 2 9

10 PHYSICAL DIMENSIONS ft688 QFNmmXmm-2 Unit: millimeters. August 2

11 ft688 IMPORTANT NOTICE. Disclaimer: The information in document is intended to help you evaluate this product. Fangtek, LTD. makes no warranty, either expressed or implied, as to the product information herein listed, and reserves the right to change or discontinue work on this product without notice. 2. Life support policy: Fangtek s products are not authorized for use as critical components in life support devices or systems without the express written approval of the president and general counsel of Fangtek Inc. As used herein Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness.. Fangtek assumes no liability for incidental, consequential or special damages or injury that may result from misapplications or improper use or operation of its products 4. Fangtek makes no warranty or representation that its products are subject to intellectual property license from Fangtek or any third party, and Fangtek makes no warranty or representation of non-infringement with respect to its products. Fangtek specifically excludes any liability to the customer or any third party arising from or related to the products infringement of any third party s intellectual property rights, including patents, copyright, trademark or trade secret rights of any third party. 5. The information in this document is merely to indicate the characteristics and performance of Fangtek products. Fangtek assumes no responsibility for any intellectual property claims or other problems that may result from applications based on the document presented herein. Fangtek makes no warranty with respect to its products, express or implied, including, but not limited to the warranties of merchantability, fitness for a particular use and title. 6. Trademarks: The company and product names in this document may be the trademarks or registered trademarks of their respective manufacturers. Fangtek is trademark of Fangtek, LTD. CONTACT INFORMATION Fangtek Electronics (Shanghai) Co., Ltd Room 5&54, Lane 98, Zhangheng Road Zhangjiang Hi-tech Park, Pudong District Shanghai, China, 224 Tel: Fax: Website: August 2

The BCT4302B is available in 20-pin 3mm x 3mm QFN package. The operating temperature range is from

The BCT4302B is available in 20-pin 3mm x 3mm QFN package. The operating temperature range is from General Description The is a dual SIM card control chip optimized for GSM/EDGE/GPRS/3G handsets, It provides the power conversion and signal level translation needed for advanced cell phones to interface