
SCR—Serial Control Register
H'B2
SCI0
Bit
Initial value
Read/Write
7
TIE
0
R/W
6
RIE
0
R/W
5
TE
0
R/W
4
RE
0
R/W
3
MPIE
0
R/W
0
CKE0
0
R/W
2
TEIE
0
R/W
1
CKE1
0
R/W
Transmit interrupt enable
0
Transmit-data-empty interrupt request (TXI) is disabled
1
Transmit-data-empty interrupt request (TXI) is enabled
Receive interrupt enable
0
Receive-data-full (RXI) and receive-error (ERI) interrupt requests are disabled
1
Receive-data-full (RXI) and receive-error (ERI) interrupt requests are enabled
Transmit enable
0
Transmitting is disabled
1
Transmitting is enabled
Clock enable 1 and 0
Bit 1
CKE0
0
CKE1
0
Multiprocessor interrupt enable
0
Multiprocessor interrupts are disabled (normal receive operation)
1
Multiprocessor interrupts are enabled
1
Clock Selection and Output
Asynchronous mode
Synchronous mode
Asynchronous mode
Synchronous mode
Asynchronous mode
Synchronous mode
Asynchronous mode
Synchronous mode
1
0
1
Bit 0
Receive enable
0
Receiving is disabled
1
Receiving is enabled
Transmit-end interrupt enable
0
Transmit-end interrupt requests (TEI) are disabled
1
Transmit-end interrupt requests (TEI) are enabled
Internal clock, SCK pin available for generic I/O
Internal clock, SCK pin used for serial clock output
Internal clock, SCK pin used for clock output
Internal clock, SCK pin used for serial clock output
External clock, SCK pin used for clock input
External clock, SCK pin used for serial clock input
External clock, SCK pin used for clock input
External clock, SCK pin used for serial clock input
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