H8S2245 datasheet(500/818 Pages) RENESAS

Part #	H8S2245

Description	Renesas 16-Bit Single-Chip Microcomputer H8S Family / H8S/2200 Series

PDF	818 Pages

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Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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500 / 818 page

Section 12 Serial Communication Interface (SCI)

Rev.3.00 Mar. 26, 2007 Page 458 of 772

REJ09B0355-0300

Transfer direction

Bit 0

Serial data

Serial clock

1 frame

TDRE

TEND

Bit 1

Bit 7

Bit 0

Bit 1

Bit 7

Bit 6

Data written to TDR

and TDRE flag

cleared to 0 in TXI

interrupt service routine

TEI interrupt

request generated

TXI interrupt

request generated

TXI interrupt

request generated

Figure 12.17 Example of SCI Operation in Transmission

Serial data reception (clocked synchronous mode): Figure 12.18 shows a sample flowchart for

serial reception.

The following procedure should be used for serial data reception.

When changing the operating mode from asynchronous to clocked synchronous, be sure to check

that the ORER, PER, and FER flags are all cleared to 0.

The RDRF flag will not be set if the FER or PER flag is set to 1, and neither transmit nor receive

operations will be possible.

H8S2245 Datasheet(PDF) 500 Page - Renesas Technology Corp