H8SSLASH2224 datasheet(694/1071 Pages) RENESAS

Il numero della parte	H8S/2224

Spiegazioni elettronici	16-Bit Single-Chip Microcomputer H8S Family/H8S/2200 Series

PDF	1071 Pages

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Produttore elettronici	RENESAS [Renesas Technology Corp]

Homepage	http://www.renesas.com

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Section 15 Serial Communication Interface (SCI)

Rev. 5.00 Aug 08, 2006 page 608 of 982

REJ09B0054-0500

15.6.5

Simultaneous Serial Data Transmission and Reception (Clocked Synchronous

Mode)

Figure 15.23 shows a sample flowchart for simultaneous serial transmit and receive operations.

The following procedure should be used for simultaneous serial data transmit and receive

operations. To switch from transmit mode to simultaneous transmit and receive mode, after

checking that the SCI has finished transmission and the TDRE and TEND flags are set to 1, clear

TE to 0. Then simultaneously set TE and RE to 1 with a single instruction. To switch from receive

mode to simultaneous transmit and receive mode, after checking that the SCI has finished

reception, clear RE to 0. Then after checking that the RDRF and receive error flags (ORER, FER,

and PER) are cleared to 0, simultaneously set TE and RE to 1 with a single instruction.

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