346
SCR3—Serial control register 3
H'AA
SCI3
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
Clock enable
CKE1
Bit 1
CKE0
Bit 0
Description
Transmit end interrupt enable
0
Transmit end interrupt (TEI) disabled
Communication Mode
Clock Source
SCK Pin Function
3
1
Transmit end interrupt (TEI) enabled
Multiprocessor interrupt enable
0
Multiprocessor interrupt request disabled (ordinary receive operation)
1
Multiprocessor interrupt request enabled
Until a multiprocessor bit value of 1 is received, the receive data full interrupt (RXI) and receive
error interrupt (ERI) are disabled, and serial status register (SSR) flags RDRF, FER, and
OER are not set.
0
0
Asynchronous
Internal clock
I/O port
Synchronous
Internal clock
Serial clock output
1
Asynchronous
Internal clock
Clock output
Synchronous
Reserved
1
0
Asynchronous
External clock
Clock output
Synchronous
External clock
Serial clock input
1
Asynchronous
Reserved
Synchronous
Reserved
[Clearing condition]
Multiprocessor bit receives a data value of 1
Transmit enable
0
Transmit operation disabled (TXD is the transmit data pin)
1
Transmit operation enabled (TXD is the transmit data pin)
Receive enable
0
Receive operation disabled (RXD is a general I/O port)
1
Receive operation enabled (RXD is the receive data pin)
Receive interrupt enable
0
Receive data full interrupt request (RXI) and receive error interrupt request (ERI) disabled
1
Receive data full interrupt request (RXI) and receive error interrupt request (ERI) enabled
Transmit interrupt enable
0
Transmit data empty interrupt request (TXI) disabled
1
Transmit data empty interrupt request (TXI) enabled
Reserved
Reserved
Reserved