R8A66171DD Datasheet, PDF (1/23 Pages) Renesas Technology Corp – A2RT (ADVANCED ASYNCHRONOUS RECEIVER & TRANSMITTER)

R8A66171DD/SP
A²RT (ADVANCED ASYNCHRONOUS RECEIVER & TRANSMITTER)



REJ03F0269-0100
Rev. 1.00
Feb.19.2008


D

ESCRIPTION
The R8A66171 is an integrated circuit for asynchronous serial data communications. It is used in combina-
tion 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
● 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=-40~85^OC)


A
PPLICATION
Data communication control that uses microprocessor



PIN CONFIGURATION (TOP VIEW)








D0
1
24
VCC
D1
2
23
TxD TRANSMISSION DATA OUTPUT
D2
3
D3
4
DATA BUS
D4
5
D5
6
D6
7
D7
8
READ CONTROL INPUT RD
9
22
RxD RECEPTION DATA INPUT
21
CTS ^{CLEAR-TO-SEND INPUT}
20
RTS REQUEST-TO-SEND OUTPUT
19
P0
PORT OUTPUT
18
P1
17
INT
INTERRUPT OUTPUT
16
CS
CHIP SELECT INPUT
WRITE CONTROL INPUT WR
10
COMMAND/DATA C/D
11
CONTROL INPUT _GND
12
15
RESET RESET INPUT
14
X1
CLOCK INPUT
13
X2
CLOCK OUTPUT
REJ03F269-0100 Rev.1.00 Feb.19.2008







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