HD6473032F Datasheet, PDF (332/572 Pages) Hitachi Semiconductor – Hitachi Microcomputer

11.2.5 Serial Mode Register (SMR)
SMR is an 8-bit register that specifies the SCI serial communication format and selects the clock
source for the baud rate generator.
Bit
Initial value
Read/Write
7
6
5
4
3
2
1
0
C/A
CHR
PE
O/E STOP MP CKS1 CKS0
0
0
0
0
0
0
0
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Clock select 1/0
These bits select the
baud rate generator’s
clock source
Multiprocessor mode
Selects the multiprocessor
function
Stop bit length
Selects the stop bit length
Parity mode
Selects even or odd parity
Parity enable
Selects whether a parity bit is added
Character length
Selects character length in asynchronous mode
Communication mode
Selects asynchronous or synchronous mode
The CPU can always read and write SMR. SMR is initialized to H'00 by a reset and in standby
mode.
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