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502
Table 14.8
Serial Mode Register Settings and SCI Communication Formats
SMR Settings
SCI Communication Format
Mode
Bit 7
C/
A
Bit 6
CHR
Bit 5
PE
Bit 2
MP
Bit 3
STOP
Data
Length
Parity
Bit
Multipro-
cessor Bit
Stop Bit
Length
Asynchronous
0
0
0
0
0
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
Asynchronous
0
*
1
0
8-bit
Not set
Set
1 bit
(multiprocessor
*
1
2 bits
format)
1
*
0
7-bit
1 bit
*
1
2 bits
Clock
synchronous
1
*
*
*
*
8-bit
Not set
None
Note:
Asterisks (
*
) in the table indicate don’t-care bits.
Table 14.9
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
External
Inputs a clock with frequency 16 times
the bit rate
1
Clock synch-
1
0
0
Internal
Outputs the synchronous clock
ronous
1
1
0
External
Inputs the synchronous clock
1
Note:
*
Select the function in combination with the pin function controller (PFC).
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