Datasheet

Section 22 Synchronous Serial Communication Unit (SSU)
REJ09B0465-0300 Rev. 3.00 Page 771 of 982
Sep 17, 2010
H8S/20103, H8S/20203, H8S/20223, H8S/20115, H8S/20215, H8S/20235 Group
22.2.3 SS Control Register L (SSCRL)
Address:
Bit:
Value after reset:
b7
⎯
0
b6
⎯
1
b5
SOL
1
b4
SOLP
1
b3
⎯
1
b2
⎯
1
b1
SRES
0
b0
⎯
1
H'FF05C9
Bit Symbol Bit Name Description R/W
7 ⎯ Reserved This bit is read as 0. The write value should be 0. ⎯
6 ⎯ Reserved This bit is read as 1. The write value should be 1. ⎯
5 SOL*
1
Serial data
output level
setting
0: When reading, serial data output level is low.
When writing, serial data output level is
changed to low.
1: When reading, serial data output level is high.
When writing, serial data output level is
changed to high.
R/W
4 SOLP SOL write
protect
0: When writing, output level can be changed
according to the value of the SOL bit.
1: When reading, this bit is always read as 1.
When writing, modifying to the SOL bit is invalid.
⎯
3, 2 ⎯ Reserved These bits are read as 1. The write value should
be 1.
⎯
1 SRES Software reset 0: Does not reset.
1: The SSU internal sequencer is forcibly reset.*
2
0 ⎯ Reserved This bit is read as 1. The write value should be 1. ⎯
Notes: 1. When the output level is changed, the SOLP bit (bit4) should be cleared to 0 and the
MOV instruction should be used. If this bit is written during data transfer, erroneous
operation may occur. Therefore this bit must not be manipulated during transmission.
2. This bit should always be cleared by software as this bit is not cleared automatically.