3069RF-ZTAT Datasheet, PDF(477/1003 Page) Renesas Technology Corp – RENESAS 16-BIT SINGLE-CHIP MICROCOMPUTER

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3069RF-ZTAT Datasheet, PDF (477/1003 Pages) Renesas Technology Corp – RENESAS 16-BIT SINGLE-CHIP MICROCOMPUTER

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13.1.2 Block Diagram

Figure 13.1 shows a block diagram of the SCI.

Module data bus

Internal data bus

RxD

TxD

SCK

RDR

RSR

TDR

SSR

BRR

SCR

TSR

SMR

SCMR

Transmit/receive

control

Baud rate

generator

Parity generate

Parity check

Clock

External clock

[Legend]

RSR : Receive shift register

RDR : Receive data register

TSR : Transmit shift register

TDR : Transmit data register

SMR : Serial mode register

SCR : Serial control register

SSR : Serial status register

BRR : Bit rate register

SCMR : Smart card mode register

Figure 13.1 SCI Block Diagram

Ï

Ï/ 4

Ï/16

Ï/64

TEI

TXI

RXI

ERI

Rev. 5.0, 09/04, page 455 of 978

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