SH7137 Datasheet, PDF (630/1160 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperH™ RISC engine Family

Section 15 Synchronous Serial Communication Unit (SSU)
Initial
Bit
Bit Name Value R/W
4
SOL
0
R/W
3
SOLP
1
R/W
2

1
R
1, 0 CSS[1:0] 01
R/W
Description
Serial Data Output Value Select
The serial data output retains its level of the last bit
after completion of transmission. The output level
before or after transmission can be specified by setting
this bit. When specifying the output level, use the MOV
instruction after clearing the SOLP bit to 0. Since writing
to this bit during data transmission causes malfunctions,
this bit should not be changed.
0: Serial data output is changed to low.
1: Serial data output is changed to high.
SOL Bit Write Protect
When changing the output level of serial data, set the
SOL bit to 1 or clear the SOL bit to 0 after clearing the
SOLP bit to 0 using the MOV instruction.
0: Output level can be changed by the SOL bit
1: Output level cannot be changed by the SOL bit. This
bit is always read as 1.
Reserved
This bit is always read as 1. The write value should
always be 1.
SCS Pin Select
Select that the SCS pin functions as SCS input or
output.
00: Setting prohibited
01: Function as SCS input
10: Function as SCS automatic input/output (function as
SCS input before and after transfer and output a
low level during transfer)
11: Function as SCS automatic output (outputs a high
level before and after transfer and outputs a low
level during transfer)
Rev. 2.00 Sep. 10, 2008 Page 604 of 1130
REJ09B0402-0200