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Section 15 Serial Communication Interface with FIFO
R01UH0134EJ0400 Rev. 4.00 Page 717 of 2108
Sep 24, 2014
SH7262 Group, SH7264 Group
15.3.5 Serial Mode Register (SCSMR)
SCSMR specifies the serial communication format and selects the clock source for the baud rate
generator.
The CPU can always read from and write to SCSMR.
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
0000000000000000
R R R R R R R R R/W R/W R/W R/W R/W R R/W R/W
Bit:
Initial value:
R/W:
--------C/A CHR PE O/E STOP - CKS[1:0]
Bit Bit Name
Initial
Value
R/W Description
15 to 8 All 0 R Reserved
These bits are always read as 0. The write value should
always be 0.
7 C/A 0 R/W Communication Mode
Selects operating mode from asynchronous and clock
synchronous modes. Clock synchronous mode cannot
be used by channels that do not have an SCK pin.
0: Asynchronous mode
1: Clock synchronous mode
6 CHR 0 R/W Character Length
Selects 7-bit or 8-bit data length in asynchronous mode.
In the clock synchronous mode, the data length is
always 8 bits, regardless of the CHR setting.
0: 8-bit data
1: 7-bit data*
Note: * When 7-bit data is selected, the MSB (bit 7)
of the transmit FIFO data register is not
transmitted.