SH7080 Datasheet, PDF (924/1644 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperH™ RISC engine Family

Section 17 Synchronous Serial Communication Unit (SSU)
Initial
Bit
Bit Name Value R/W
1, 0 DATS[1:0] 00
R/W
Description
Transmit/Receive Data Length Select
Select serial data length.
00: 8 bits
01: 16 bits
10: 32 bits
11: Setting prohibited
17.3.3 SS Mode Register (SSMR)
SSMR selects the MSB first/LSB first, clock polarity, clock phase, and clock rate of synchronous
serial communication.
Bit: 7
6
5
4
MLS CPOS CPHS -
Initial value: 0
0
0
0
R/W: R/W R/W R/W R
3
2
1
0
-
CKS[2:0]
0
0
0
0
R R/W R/W R/W
Initial
Bit
Bit Name Value R/W
Description
7
MLS
0
R/W
MSB First/LSB First Select
Selects that the serial data is transmitted in MSB first or
LSB first.
0: LSB first
1: MSB first
6
CPOS
0
R/W
Clock Polarity Select
Selects the SSCK clock polarity.
0: High output in idle mode, and low output in active
mode
1: Low output in idle mode, and high output in active
mode
5
CPHS
0
R/W
Clock Phase Select (Only for SSU Mode)
Selects the SSCK clock phase.
0: Data changes at the first edge.
1: Data is latched at the first edge.
Rev. 3.00 May 17, 2007 Page 866 of 1582
REJ09B0181-0300