SH7014 datasheet(341/754 Pages) RENESAS

341 / 754 page

12. Serial Communication Interface (SCI)

Rev.5.00 Sep. 27, 2007 Page 307 of 716

REJ09B0398-0500

12.1.3

Pin Configuration

Table 12.1 summarizes the SCI pins by channel.

Table 12.1

SCI Pins

Channel

Pin Name

Abbreviation Input/Output

Function

Serial clock pin

SCK0

Input/output

SCI0 clock input/output

Receive data pin

RxD0

Input

SCI0 receive data input

Transmit data pin

TxD0

Output

SCI0 transmit data output

Serial clock pin

SCK1

Input/output

SCI1 clock input/output

Receive data pin

RxD1

Input

SCI1 receive data input

Transmit data pin

TxD1

Output

SCI1 transmit data output

12.1.4

Table 12.2 summarizes the SCI internal registers. These registers select the communication mode

(asynchronous or clock synchronous), specify the data format and bit rate, and control the

transmitter and receiver sections.

Table 12.2

Registers

Channel Name

Abbreviation R/W

Initial Value Address*

Access Size

Serial mode register

SMR0

R/W

H'00

H'FFFF81A0 8, 16

Bit rate register

BRR0

R/W

H'FF

H'FFFF81A1 8, 16

Serial control register SCR0

R/W

H'00

H'FFFF81A2 8, 16

Transmit data register TDR0

R/W

H'FF

H'FFFF81A3 8, 16

Serial status register

SSR0

R/(W)*

H'84

H'FFFF81A4 8, 16

Receive data register RDR0

H'00

H'FFFF81A5 8, 16

Serial mode register

SMR1

R/W

H'00

H'FFFF81B0 8, 16

Bit rate register

BRR1

R/W

H'FF

H'FFFF81B1 8, 16

Serial control register SCR1

R/W

H'00

H'FFFF81B2 8, 16

Transmit data register TDR1

R/W

H'FF

H'FFFF81B3 8, 16

Serial status register

SSR1

R/(W)*

H'84

H'FFFF81B4 8, 16

Receive data register RDR1

H'00

H'FFFF81B5 8, 16

Notes: 1. The only value that can be written is a 0 to clear the flags.

2. Do not access empty addresses.

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