H8-3857 Datasheet, PDF (503/560 Pages) Renesas Technology Corp – 8-Bit Single-Chip Microcomputer

SCR3—Serial control register 3
Appendix B Internal I/O Registers
H'AA
SCI3
Bit
Initial value
Read/Write
7
6
5
4
3
2
1
0
TIE
RIE
TE
RE MPIE TEIE CKE1 CKE0
0
0
0
0
0
0
0
0
R/W
R/W R/W
R/W
R/W
R/W
R/W
R/W
Clock enable
Bit 1 Bit 0
CKE1 CKE0
0
0
1
Communication Mode
Asynchronous
Synchronous
Asynchronous
Synchronous
1
0 Asynchronous
Synchronous
1 Asynchronous
Synchronous
Description
Clock Source
Internal clock
Internal clock
Internal clock
Reserved (Do not set
this combination)
External clock
External clock
Reserved (Do not set
this combination)
Reserved (Do not set
this combination)
SCK₃ Pin Function
I/O port
Serial clock output
Clock output
Reserved (Do not set
this combination)
Clock input
Serial clock input
Reserved (Do not set
this combination)
Reserved (Do not set
this combination)
Transmit end interrupt enable
0 Transmit end interrupt (TEI) disabled
1 Transmit end interrupt (TEI) enabled
Multiprocessor interrupt enable
0 Multiprocessor interrupt request disabled (ordinary receive operation)
[Clearing condition]
Multiprocessor bit receives a data value of 1
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.
Receive enable
0 Receive operation disabled (RXD is a general I/O port)
1 Receive operation enabled (RXD is the receive data pin)
Transmit enable
0 Transmit operation disabled (TXD is a general I/O port)
1 Transmit operation enabled (TXD is the transmit 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
Rev.3.00 Jul. 19, 2007 page 479 of 532
REJ09B0397-0300