Renesas Asynchronous SH7145F Manual de usuario descargar pdf (Pagina 7)

SH7145F

Asynchronous Serial Data Transmission/Reception

REJ06B0357-0100O/Rev.1.00 March 2004 Page 7 of 17

Table 3 Processing

Software Processing Hardware Processing

(1) — RSR_1 receives serial data and transfers it

to RDR_1

(2) — Set RDRF flag in SSR_1 to 1

(3) Read data from RDR_1

(4) Clear RDRF flag in SSR_1 to 0

(5) WritereceivedatatoTDR_1 —

(6) Clear TDRE flag in SSR_1 to 1 —

(7) — TransferdatafromTDR_1toTSR_1

(8) — Set TDRE flag in SSR_1 to 1 and output

transmit data from pin TXD1

(9) — RSR_1 receives serial data and transfers it

to RDR_1

(10) — Set RDRF flag in SSR_1 to 1

(11) Read data from RDR_1

(12) Clear RDRF flag in SSR_1 to 0

(13) Write receive data to TDR_1 —

(14) Clear TDRE flag in SSR_1 to 1 —

(15) — Transfer data from TDR_1 to TSR_1

(16) Repeat Repeat

1 2 3 4 5 6 7 8 9 10 11 12 ... 16 17

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