SH7708 Datasheet, PDF (373/625 Pages) Renesas Technology Corp – SuperH™ RISC engine

Table 13.9Serial Mode Register Settings and SCI Communication Formats
SCSMR Settings
SCI Communication Format
Mode
Bit 7 Bit 6 Bit 5 Bit 2 Bit 3 D a t a Parity Multipro- Stop Bit
C/A CHR P E M P STOP Length Bit
cessor Length
Bit
Asynchronous 0 0
0
0
0
8-bit Not used Not used 1 bit
1
2 bits
1
0
Used
1 bit
1
2 bits
1
0
0
7-bit Not used
1 bit
1
2 bits
1
0
Used
1 bit
1
2 bits
Asynchronous
(multiprocessor
format)
0
*
1
0
*
1
1
*
0
8-bit Not used Used
7-bit
1 bit
2 bits
1 bit
*
1
2 bits
Synchronous 1 *
*
*
*
8-bit
Not used None
Note: Asterisks (*) indicate don’t-care bits.
Table 13.10 SCSMR and SCSCR Settings and SCI Clock Source Selection
SCSMR
SCSCR
Settings
Mode
Bit 7
C/A
Bit 1 Bit 0
CKE1 CKE0
Asynchronous 0
mode
0
0
1
Synchronous 1
mode
1
0
1
0
0
1
1
0
1
SCI Transmit/Receive Clock
Clock
Source
Internal
External
Internal
SCK
Pin Function
SCI does not use the SCK pin
Outputs a clock with frequency
matching the bit rate
Inputs a clock with frequency 16
times the bit rate
Outputs the serial clock
External
Inputs the serial clock
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