HD64F3028F25 Datasheet, PDF (492/925 Pages) Renesas Technology Corp – Hardware Manual Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Series

13.2.6 Serial Control Register (SCR)
SCR register enables or disables the SCI transmitter and receiver, enables or disables serial clock
output in asynchronous mode, enables or disables interrupts, and selects the transmit/receive clock
source.
Bit
7
6
5
TIE
RIE
TE
Initial value
0
0
0
Read/Write
R/W
R/W
R/W
4
3
2
1
0
RE
MPIE
TEIE
CKE1 CKE0
0
0
0
0
0
R/W
R/W
R/W
R/W
R/W
Clock enable 1/0
These bits select the
SCI clock source
Transmit-end interrupt enable
Enables or disables transmit-end
interrupts (TEI)
Multiprocessor interrupt enable
Enables or disables multiprocessor
interrupts
Receive enable
Enables or disables the receiver
Transmit enable
Enables or disables the transmitter
Receive interrupt enable
Enables or disables receive-data-full interrupts (RXI) and
receive-error interrupts (ERI)
Transmit interrupt enable
Enables or disables transmit-data-empty interrupts (TXI)
The CPU can always read and write SCR. SCR is initialized to H'00 by a reset and in standby
mode.
Rev. 2.00, 09/03, page 460 of 890