SH7708 datasheet(360/633 Pages) RENESAS

Nome de Peças	SH7708

Descrição Electrónicos	SuperH??RISC engine

PDF	633 Pages

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Fabricante Electrônico	RENESAS [Renesas Technology Corp]

Página de início	http://www.renesas.com

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• Internal or external transmit/receive clock source: From either baud rate generator (internal) or

SCK pin (external)

• Four types of interrupts: Transmit-data-empty, transmit-end, receive-data-full, and receive-

error interrupts are requested independently.

• When the SCI is not in use, it can be stopped by halting the clock supplied to it, saving power.

13.1.2

Block Diagram

Figure 13.1 shows a block diagram of the SCI.

RxD

TxD

SCK

SCI

SCBRR

SCSCR

SCSSR

SCSMR

SCTDR

SCTSR

SCRDR

SCRSR

SCSPTR

Parity generation

Parity check

Clock

External clock

Module data bus

Internal

data bus

φ/4

φ/16

φ/64

TEI

TXI

RXI

ERI

Baud rate

generator

Transmit/

receive

control

SCRSR:

SCRDR:

SCTSR:

SCTDR:

Receive shift register

Receive data register

Transmit shift register

Transmit data register

SCSMR:

SCSCR:

SCSSR:

SCBRR:

SCSPTR:

Serial mode register

Serial control register

Serial status register

Bit rate register

Serial port register

Figure 13.1 SCI Block Diagram

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