SH7721 datasheet(682/1524 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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682 / 1524 page

Section 18

Serial Communication Interface with FIFO (SCIF)

Rev. 3.00 Jan. 18, 2008 Page 620 of 1458

REJ09B0033-0300

Figure 18.6 shows the transmit data stop function flowchart.

Start of transmission

End of transmission

Set transmit data stop

number in SCTDSR

Set TSE and TSIE bits

in SCFCR to 1

Read TSF bit in SCSSR;

if it is 1, clear to 0 after reading

1 from TSF bit

Yes

TSF = 1 ?

1. Set the transmit data stop number in SCTDSR, then set

the TSE bit in SCFCR to 1.When an interrupt is enabled,

also set the TSIE bit to 1.

2. If the TSF bit in SCSSR is set to 1, clear it to 0 after

reading 1. When transmit data is written to SCFTDR in

this state, transmit operation is started.

3. If the TSF bit is set to 1 (transmit data stop number is

matched with transmit data number), transmit operation

is stopped. If the TSIE bit is set to 1, an interrupt is

generated.

Serial transmission continuation procedure:

Set the TCRST bit in SCFCR to 1, clear transmit count, and

clear the TCRST bit to 0. Then follow steps 1, 2, and 3.

Figure 18.6

Transmit Data Stop Function Flowchart

SH7721 Datasheet(PDF) 682 Page - Renesas Technology Corp