821
SCR1—Serial Control Register 1
H'FF82
SCI1
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
1
0
Asynchronous
mode
Synchronous
mode
Asynchronous
mode
Synchronous
mode
Internal clock/SCK pin functions
as I/O port
Internal clock/SCK pin functions
as serial clock output
Internal clock/SCK pin functions
as clock output
*
1
Internal clock/SCK pin functions
as serial clock output
External clock/SCK pin functions
as clock input
*
2
External clock/SCK pin functions
as serial clock input
External clock/SCK pin functions
as clock input
*
2
External clock/SCK pin functions
as serial clock input
Clock Enable
0
1
Transmit end interrupt (TEI) request disabled
Transmit end interrupt (TEI) request enabled
Transmit End Interrupt Enable
0
Multiprocessor interrupts disabled
[Clearing conditions]
When the MPIE bit is cleared to 0
When MPB= 1 data is received
Multiprocessor interrupts enabled
Receive interrupt (RXI) requests, receive error interrupt (ERI)
requests, and setting of the RDRF, FER, and ORER flags in
SSR are disabled until data with the multiprocessor bit set to 1
is received
Multiprocessor Interrupt Enable
0
1
Reception disabled
Reception enabled
Receive Enable
0
1
Transmission disabled
Transmission enabled
Transmit Enable
0
Receive data full interrupt (RXI) request and
receive error interrupt (ERI) request disabled
Receive data full interrupt (RXI) request and
receive error interrupt (ERI) request enabled
Receive Interrupt Enable
0
1
Transmit data empty interrupt (TXI) requests disabled
Transmit data empty interrupt (TXI) requests enabled
Transmit Interrupt Enable
Notes:
Bit
Initial value
Read/Write
:
:
:
Asynchronous
mode
Synchronous
mode
Asynchronous
mode
Synchronous
mode
1. Outputs a clock of the same frequency as the bit rate.
2. Inputs a clock with a frequency 16 times the bit rate.
1
1
1
0
1
0