Renesas SH7145F (3) Data Receive Routine, (4) Data Transfer Routine

1 17

SH7145F

Asynchronous Serial Data Transmission/Reception

REJ06B0357-0100O/Rev.1.00 March 2004 Page13 of 17

(3) Data Receive Routine

Yes

Read receive data from RDR_1 and

store it in on-chip RAM

Transmit receive data without

modification

Clear RDRF flag in SSR_1 to 0

Wait until

RDR_1 finishes receiving

data

RTE

rcv_sci()

(4) Data Transfer Routine

Yes

Write transmit data to TDR_1

Clear TDRE bit in SSR_1 to 0

Wait until

possible to write to

TDR_1

RTE

trans_sci()

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