Renesas Asynchronous SH7145F Bedienungsanleitung PDF herunterladen (Seite 11)

SH7145F

Synchronous Serial Data Transmission

REJ06B0352-0100O/Rev.1.00 March 2004 Page 11 of 16

(2) SCI1 Initialize Routine

Yes

Cancel SCI0 module standby status

Clear to 0 bits TIE, RIE, TE, RE, MPIE,

and TEIE in SCR_0

Select on-chip clock as clock source

using CKE1 and CKE0 in SCR_0

Using SMR_0, select synchronous

mode and Pφ as baud rate generator

clock source

Using BRR_0, set communication

speed to 250 kbps

Using DIR bit in SDCR_0, select

LSB-first communication

Using SCR_0, prohibit interrupts

Using PACRL2, set PA2 (pin 132) to

SCK function and PA1 (pin 131) to

TXD function

Using TE bit in SCR_0, enable transmit

operation

Wait minimum

1-bit transfer time

init_sci()

RTE

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Renesas Asynchronous SH7145F Bedienungsanleitung Seite 11