459
Table 14.9
Serial Mode Register Settings and SCI Communication Formats
SCSMR Settings
SCI Communication Format
Bit 7
C/
A
Bit 6
CHR
Bit 5
PE
Bit 2
MP
Bit 3
STOP
Mode
Data
Length
Parity
Bit
Multipro-
cessor Bit
Stop Bit
Length
0
0
0
0
0
Asynchronous
8-bit
Not set
Not set
1 bit
1
2 bits
1
0
Set
1 bit
1
2 bits
1
0
0
7-bit
Not set
1 bit
1
2 bits
1
0
Set
1 bit
1
2 bits
0
*
0
Asynchronous
8-bit
Not set
Set
1 bit
*
1
1
(multiprocessor
2 bits
1
*
0
format)
7-bit
1 bit
*
1
2 bits
1
*
*
*
*
Synchronous
8-bit
Not set
None
Note:
Asterisks (
*
) indicate don’t-care bits.
Table 14.10 SCSMR and SCSCR Settings and SCI Clock Source Selection
SCSMR
SCSCR Settings
SCI Transmit/Receive Clock
Bit 7
C/
A
Bit 1
CKE1
Bit 0
CKE0
Mode
Clock
Source
SCK
Pin Function
0
0
0
Asynchronous
Internal
SCI does not use the SCK pin
1
mode
Outputs a clock with frequency
matching the bit rate
1
0
External
Inputs a clock with frequency 16
1
times the bit rate
1
0
0
Synchronous
Internal
Outputs the synchronous clock
1
mode
1
0
External
Inputs the synchronous clock
1
Содержание SH7709S
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