Toshiba TC9349AFG Manual

TC9349AFG2006-02-24731-1. Serial Interface Setting and Control Bits(1) Serial pin setting (PSEL and SIO bits)I/O ports 3 or 8 can be used as serial input/output pins. I/O port 3 has a CMOS structure and I/O port 8 has an N-chopen drain structure. Since voltage up to 5.5V can be applied to I/O port 8, it can do an interface with LSI of 5 Vsystem easily.I/O port 3 is usually used for communication with LSI that drives the V DD power supply in the same power supplysystem. This port can also be used as a N-ch open-drain port, and accept voltage up to the power supply of the VLCDpin (3 V). Therefore, it can be used as an interface with LSI in power supply systems of 3 V or below.Set this control bit to “0” when the serial interface is not used.Note: These bits are reset to “0” after a system reset.(2) Type of serial operation (M0 and M1 bits)The serial operation can be selected from three serial interface modes; 3-wired type, 2-wired type and UART. Setthis control bit to “0” when the serial interface is not used. When a mode is selected, the pins are switched to thefunction pins as listed below.Note: These bits are reset to “0” after system reset.(3) Selection of serial operation clock (CK0, CK1, OSC0 and OSC1 bits)The serial operation clock sets the serial interface operating speed. When the 2- or 3-wired master mode is selected,operation speed can be selected from four types, fosc/2, fosc/4, fosc/8 and fosc/16. When UART is selected, operationspeed can be selected from three types, 9600/2400/1200 bps. When a high-speed oscillator is used, the operationspeed of the 2- or 3-wired type can be accelerable to 300 kHz, which enables the use of the UART transmission rate,19200 bps. Refer to the following table and select the operation clock.When the 2- or 3-wired slave mode is selected, these bits revert to “don't care” state, which enables serial clockoperation at an operation speed of up to 200 kHz.Note: The duty of the 2- or 3-wired mode is always 50%.Note: When the high-speed oscillator is prohibited, the OSC0 and OSC1 bits revert to “don't care”state.Note: Set all of these bits to “0” when the 2- or 3-wired slave mode is selected.Note: These bits are reset to “0” after a system reset.M1 M00 0101110使用端子および名称P3-0SCK1RX1P3-1 P3-2 P8-3P8-1 P8-2SDIO1SI1(P3-2)SDIO1SCK1TX1P3-2P3-2SCK2RX2SDIO2SI2(P8-1) SDIO2SCK2TX2P8-1P8-1I/Oポート3選択 I/Oポート8選択シリアルインタフェースモード動作停止3線式インタフェース2線式インタフェースUARTSerial interface modeName of pin being usedSelect I/O port 3 Select I/O port 8Operation stop2-wired interface3-wired interfaceSIO PSEL0 *1110Serial interface pinEach pin I/O Port operationI/O port3I/O port8Pin structure-CMOSNch open drainPin type-CMOS orNch open drainNch open drainMaximum applicable voltage-~VLCD (3 V)~5.5 V