SH7059 Datasheet, PDF (462/1042 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer

15. Serial Communication Interface (SCI)
Table 15.8 Serial Mode Register Settings and SCI Communication Formats
Mode
Asynchronous
Bit 7
C/A
0
Bit 6
CHR
0
SMR Settings
Bit 5
PE
Bit 2
MP
0
0
1
1
0
1
Asynchronous
(multiprocessor
format)
0
*
1
*
1
*
*
Synchronous 1
*
*
*
Note: Asterisks (*) in the table indicate don't-care bits.
Bit 3
STOP
0
1
0
1
0
1
0
1
0
1
0
1
*
Data
Length
8-bit
7-bit
8-bit
7-bit
8-bit
SCI Communication Format
Parity
Bit
Multipro- Stop Bit
cessor Bit Length
Absent
Absent
1 bit
2 bits
Present
1 bit
2 bits
Absent
1 bit
2 bits
Present
1 bit
2 bits
Absent
Present 1 bit
2 bits
1 bit
2 bits
Absent
None
Table 15.9 SMR and SCR Settings and SCI Clock Source Selection
SMR
SCR Settings
SCI Transmit/Receive Clock
Mode
Bit 7 C/A Bit 1 CKE1 Bit 0 CKE0 Clock Source SCK Pin Function*
Asynchronous 0
0
0
Internal
SCI does not use the SCK pin
1
Outputs a clock with frequency matching
the bit rate
1
0
1
External
Inputs a clock with frequency 16 times the
bit rate
Synchronous 1
0
0
1
Internal
Outputs the serial clock
or the inverted serial clock
1
0
1
External
Inputs the serial clock
or the inverted serial clock
Note: * Select the function in combination with the pin function controller (PFC).
Rev.3.00 Mar. 12, 2008 Page 372 of 948
REJ09B0177-0300