3069RF-ZTAT Datasheet, PDF (925/1003 Pages) Renesas Technology Corp – RENESAS 16-BIT SINGLE-CHIP MICROCOMPUTER

SCR—Serial Control Register
H'FFFB2
SCI0
Bit
7
6
5
4
3
2
1
0
TIE
RIE
TE
RE
MPIE
TEIE
CKE1
CKE0
Initial value
0
0
0
0
0
Read/Write
R/W
R/W
R/W
R/W
R/W
0
0
0
R/W
R/W
R/W
Receive enable
0 ^{Receiving is}
disabled
1 ^{Receiving is}
enabled
Transmit enable
0 Transmitting is disabled
1 Transmitting is enabled
Clock enable 1 and 0
(for serial communication interface)
Bit 1 Bit 0
CKE1 CKE0
Description
0
Asynchronous mode
Internal clock, SCK pin
available for generic I/O
Synchronous mode
Internal clock, SCK pin
used for serial clock output
0
1
Asynchronous mode
Internal clock, SCK pin
used for clock output
Synchronous mode
Internal clock, SCK pin
used for serial clock output
0
Asynchronous mode
External clock, SCK pin
used for clock input
Synchronous mode
External clock, SCK pin
used for serial clock input
1
1
Asynchronous mode
External clock, SCK pin
used for clock input
Synchronous mode
External clock, SCK pin
used for serial clock input
Clock enable 1 and 0 (for smart card interface)
SMR Bit 1 Bit 0
GM CKE1 CKE0
0
0
0
1
Description
SCK pin available for generic I/O
SCK pin used for clock output
0 SCK pin output fixed low
0
1
SCK pin used for clock output
1
0 SCK pin output fixed high
1
1
SCK pin used for clock output
Transmit-end interrupt enable
0 Transmit-end interrupt requests (TEI) are disabled
1 Transmit-end interrupt requests (TEI) are enabled
Multiprocessor interrupt enable
0 Multiprocessor interrupts are disabled (normal receive operation)
1 Multiprocessor interrupts are 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 interrupt enable
0 Transmit-data-empty interrupt request (TXI) is disabled
1 Transmit-data-empty interrupt request (TXI) is enabled
Rev. 5.0, 09/04, page 903 of 978