Datasheet

Section 16 Synchronous Serial Communication Unit (SSU)
Rev. 4.00 Mar. 15, 2006 Page 352 of 556
REJ09B0026-0400
Bit Bit Name
Initial
Value R/W Description
4 SOL 0 R/W Serial Data Output Level Setting
Although the value in the last bit of transmit data is
retained in the serial data output after the end of
transmission, the output level of serial data can be
changed by manipulating this bit before or after
transmission. When the output level is changed, the
SOLP bit 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.
0: Shows serial data output level to low in reading.
Changes serial data output level to low in writing
1: Shows serial data output level to high in reading.
Changes serial data output level to high in writing
3 SOLP 1 R/W SOL Write Protect
When output level of serial data is changed, the MOV
instruction is used to set the SOL bit to 1 and clear this bit
to 0 or to clear the SOL bit and this bit to 0.
0: In writing, output level can be changed according to the
value of the SOL bit.
1: In reading, this bit is always read as 1. In writing, it
cannot be modified output level.
2 SCKS 0 R/W SSCK Pin Select
Selects whether the SSCK pin functions as a port or a
serial clock pin.
0: Functions as a port
1: Functions as a serial clock pin
1
0
CSS1
CSS0
0
0
R/W
R/W
SCS Pin Select
Selects whether the SCS pin functions as a port, an SCS
input, or SCS output. When the SSUMS bit in SSCRL is
0, the SCS pin functions as a port regardless of the
setting of this bit.
00: Functions as a port
01: Functions as an SCS input
1X: Functions as an SCS output (however, functions as
an SCS input before starting transfer)
[Legend]
X: Don't care.