SH7721 datasheet(785/1524 Pages) RENESAS

Part #	SH7721

Description	Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series

PDF	1524 Pages

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Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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785 / 1524 page

Section 21

Serial I/O with FIFO (SIOF)

Rev. 3.00 Jan. 18, 2008 Page 723 of 1458

REJ09B0033-0300

(3)

Transmission in Slave Mode

Figure 21.11 shows an example of settings and operation for slave mode transmission.

Start

Yes

End

No.

Set SIMDR, SISCR, SITDAR,

SIRDAR, SICDAR, and SIFCTR

Set the TXE bit in SICTR to 1

TDREQ = 1?

Set SITDR

Transmit SITDR from SIOFTXD

synchronously with SIOFSYNC

Transfer

ended?

Clear the TXE bit in SICTR to 0

Set operating mode, serial clock,

slot positions for transmit/receive

data, slot position for control data,

and FIFO request threshold value

Set transmit data

Set to disable transmission

Issue transmit transfer request

to enable transmission when

frame synchronous signal is

input

Transmit

End transmission

Flow Chart

SIOF Settings

SIOF Operation

Set to enable transmission

Figure 21.11

Example of Transmit Operation in Slave Mode

SH7721 Datasheet(PDF) 785 Page - Renesas Technology Corp