SH7059 Datasheet, PDF (491/1042 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer

16. Synchronous Serial Communication Unit (SSU)
16.3.1 SS Control Register H (SSCRH)
SSCRH specifies SSO pin output value selection, SSCK pin selection, and SCS pin selection.
Bit:
7
6
5
4
3
2
MSS
—
—
SOL
SOLP
SCKS
Initial value:
0
0
0
0
1
0
R/W:
R/W
R/W
R/W
R/W
R/W
R/W
1
CSS1
0
R/W
0
CSS0
0
R/W
Bit Bit Name
7 MSS
6, 5 ⎯
4 SOL
3 SOLP
2 SCKS
Initial Value R/W
0
R/W
0
⎯
0
R/W
0
R
0
R/W
Description
Master Selection
This bit must be set to 1 in order to use the SSU.
When the CE bit in SSSR is set, this bit is automatically cleared.
Reset this bit to 1 when restarting communication.
0: Reserved. (Initial value)
1: Master mode enabled.
Reserved
This bit is always read as 0. The write value should always be 0.
Serial Data Output Value Selection
The output level of serial data, which retains that of the last bit, can be
modified by operating this bit before or after transmission. When
modifying the output level, clear the SOLP bit to 0. The modified output
level is retained until the start of the next transmit operation. Since
writing to this bit during data transmission causes malfunctions, this bit
should not be modified.
0: Serial data output is modified to low level. (Initial value)
1: Serial data output is modified to high level.
SOL Bit Write Protect
When modifying the output level for serial data, either set SOL to 1 and
clear SOLP to 0 or clear both SOL and SOLP to 0.
0: Output level can be modified by the SOL value
1: This bit is always read as 1 and cannot be modified. (Initial value)
SSCK Output Selection
To set the SSCK pin to function as a serial clock pin, set this bit to 1
after setting the pin function controller (PFC) to the SSCK function.
0: High-level output. (Initial value)
1: Serial clock output.
Rev.3.00 Mar. 12, 2008 Page 401 of 948
REJ09B0177-0300