Renesas SH7145F SH7145F, Table 3 Processing

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) Readd atafrom RDR_1

(4) Clear RDRFflag in SSR_1 to 0

(5) WritereceivedatatoTDR_1 —

(6) ClearTDRE 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 datato TDR_1 —

(14) Clear TDRE flag in SSR_1to 1 —

(15) — Transfer data from TDR_1 to TSR_1

(16) Repeat Repeat

Contents

Main APPLICATION NOTE SH7145F Asynchronous Serial Data Transmission/Reception Summary Device for Which Operation Has Been Confirmed Contents 1. Specifications REJ06B0357-0100O/Rev.1.00 March 2004 Page 3 of 17 2 Functions Used Figure 2 SCI(ch1) Block Diagram Page Page REJ06B0357-0100O/Rev.1.00 March 2004 Page 6 of 17 3. Operation Figure 3 Data Transmission Operation SH7145F Table 3 Processing 4. Software REJ06B0357-0100O/Rev.1.00 March 2004 Page 9 of 17 Table 6 On-Chip Register Descriptions REJ06B0357-0100O/Rev.1.00 March 2004 Page10 of 17 *: Can only be cleared to 0. Setting to 1 is performed by hardware. 5. Flowcharts (1) Main Routine (2) SCI1 Initialize Routine (3) Data Receive Routine (4) Data Transfer Routine SH7145F 6. Program Listing Page Page REJ06B0357-0100O/Rev.1.00 March 2004 Page17 of 17 Keep safety first in your circuit designs! Notes regarding these materials