HD64F38602R Datasheet, PDF (318/552 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer

Section 15 Synchronous Serial Communication Unit (SSU)
Initial
Bit
Bit Name Value R/W Description
5
SOOS
0
R/W Serial Data Open-Drain Output Select
Selects whether the serial data output pin is CMOS
output or NMOS open-drain output. The serial data
output pin is changed according to the register setting
value. For details, refer to section 15.4.3, Relationship
between Data Input/Output and Shift Register.
0: CMOS output
1: NMOS open-drain output
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,
output level cannot be changed. (See section 15.5,
Usage Note.)
Rev. 3.00 May 15, 2007 Page 286 of 516
REJ09B0152-0300