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R8A66171SP Dataheets PDF



Part Number R8A66171SP
Manufacturers Renesas Technology
Logo Renesas Technology
Description A2RT
Datasheet R8A66171SP DatasheetR8A66171SP Datasheet (PDF)

R8A66171DD/SP A2RT (ADVANCED ASYNCHRONOUS RECEIVER & TRANSMITTER) REJ03F0269-0100 Rev. 1.00 Feb.19.2008 DESCRIPTION The R8A66171 is an integrated circuit for asynchronous serial data communications. It is used in combination with an 8-bit microprocessor and is produced using the silicon gate CMOS technology. R8A66171 is the succession product of M66230. FEATURES ● Baud rate generator ● 4-byte FIFO data buffer for transmission and reception www.DataSheet4U.com ● Error detection : CRC-CCITT ● W.

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R8A66171DD/SP A2RT (ADVANCED ASYNCHRONOUS RECEIVER & TRANSMITTER) REJ03F0269-0100 Rev. 1.00 Feb.19.2008 DESCRIPTION The R8A66171 is an integrated circuit for asynchronous serial data communications. It is used in combination with an 8-bit microprocessor and is produced using the silicon gate CMOS technology. R8A66171 is the succession product of M66230. FEATURES ● Baud rate generator ● 4-byte FIFO data buffer for transmission and reception www.DataSheet4U.com ● Error detection : CRC-CCITT ● Wakeup function ● Majority-voting system by sampling three points of received data ● Transmission / reception data format ( number of bits ) Start bit 1 Data bit 8 Wakeup bit 1 or nil Parity bit 1 or nil Stop bit 1 or 2 ● Transmission speed 500Kbps (max) ● Access time ta (/RD-D) : 100ns ● High output current IOH=-24mA IOL=24mA TxD, /RTS, P0, P1 pins ● Schmitt triggered input RxD, /CTS, /RESET pins ● Wide operating supply voltage range (Vcc=3.0~3.6V or Vcc=4.5~5.5V) ● Wide operating temperature range (Ta=-40~85OC) APPLICATION Data communication control that uses microprocessor PIN CONFIGURATION (TOP VIEW) D0 D1 D2 DATA BUS D3 D4 D5 D6 D7 READ CONTROL INPUT WRITE CONTROL INPUT RD WR 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 V CC TxD RxD CTS RTS P0 P1 INT CS RESET X1 X2 TRANSMISSION DATA OUTPUT RECEPTION DATA INPUT CLEAR-TO-SEND INPUT REQUEST-TO-SEND OUTPUT PORT OUTPUT INTERRUPT OUTPUT CHIP SELECT INPUT RESET INPUT CLOCK INPUT CLOCK OUTPUT COMMAND/DATA C/D CONTROL INPUT GND REJ03F269-0100 Rev.1.00 Feb.19.2008 Page 1 of 22 R8A66171DD/SP FUNCTION The R8A66171 is a UART (Universal Asynchronous Receiver/Transmitter) and is used in the peripheral circuit of a MCU. The R8A66171 receives parallel data, converts into serial format, and then transmits the serial data via the TxD pin. The device also receives data via the RxD pin from external circuits and converts it into parallel format, and sends the parallel data via the data bus. BLOCK DIAGRAM Reset input Command/Data control input www.DataSheet4U.com Read control input Write control input Chip select input RESET C/D RD WR CS D0 D1 D2 D3 15 11 9 10 16 READ/ WRITE CONTRO L CIRCUIT 8 24 VCC GND TXD Transmission data output CTS RTS Clear-to-send input Request-to-send output TRANSMIT DATA BUFFER 4-BYTE FIFO 8 TRANSMIT BUFFER 12 23 TRANSMIT CONTROL, ERROR DETECTION CODE GENERATION(CRC) CIRCUIT 8 COMMAND REGISTER 8 STATUS REGISTER 21 1 2 3 4 5 6 7 8 20 Data bus D4 D5 D6 D7 DATA 8 BUS BUFFER RECEIVE CONTROL, ERROR DETECTION(CRC) CIRCUIT 8 RECEIVE DATA BUFFER 4-BYTE FIFO RECEIVE BUFFER 22 19 18 17 RXD P0 P1 INT Reception data input Port output Interrupt output SAMPLING CLOCK Clock input Clock output X1 X2 14 13 BAUD RATE GENERATOR 1/16 DIVISION CIRCUIT TRANSFER CLOCK REJ03F269-0100 Rev.1.00 Feb.19.2008 Page 2 of 22 R8A66171DD/SP OPERATION The R8A66171 is interfaced to a system bus and provides all functions needed for data communication. 16 A0 4 Decoder Addre.


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