Renesas rl78 User Manual

RL78/G1A

CHAPTER 12 SERIAL ARRAY UNIT

R01UH0305EJ0200 Rev.2.00

472

Jul 04, 2013

Figure 12-51. Procedure for Resuming Slave Transmission

Remark m: Unit number (m = 0, 1), n: Channel number (n = 0 to 3), p: CSI number (p = 00, 01, 10, 11, 20, 21),

mn = 00 to 03, 10, 11

Starting setting for resumption

Port manipulation

Changing setting of the SPSm register

Changing setting of the SMRmn register

Changing setting of the SOm register

Port manipulation

Writing to the SSm register

Disable data output of the target channel

by setting a port register and a port

mode register.

Re-set the register to change the operation

clock setting.

Re-set the register to change serial

mode register mn (SMRmn) setting.

Set the initial output level of the serial

data (SOmn).

Enable data output of the target channel

by setting a port register and a port mode

Set the SSmn bit of the target channel to 1

(SEmn = 1: to enable operation).

Sets transmit data to the SIOp register (bits

7 to 0 of the SDRmn register) and wait for a

clock from the master.

(Selective)

(Essential)

Re-set the register to change serial

communication operation setting register

mn (SCRmn) setting.

(Selective)

Changing setting of the SCRmn register

If the OVF flag remain set, clear this

using serial flag clear trigger register mn

(SIRmn).

(Selective)

Clearing error flag

Set the SOEmn bit to 1 and enable

output from the target channel.

(Essential)

Changing setting of the SOEm register

Completing resumption setting

Starting communication

Set the SOEmn bit to 0 to stop output

from the target channel.

(Selective)

Changing setting of the SOEm register

(Essential)

Yes

Wait until stop the communication target

(master)

Completing master

preparations?

Changing setting of the SDRmn register

Re-set the register to change the transfer

baud rate setting (setting the transfer clock

by dividing the operation clock (f

MCK

)).

(Selective)

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