HD6433045 HITACHI [Hitachi Semiconductor], HD6433045 Datasheet - Page 458

• Manufacturer Part Number: HD6433045
• Description: Hitachi Single-Chip Microcomputer
• Manufacturer: HITACHI [Hitachi Semiconductor]

13.2.6 Serial Control Register (SCR)
SCR enables 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.
The CPU can always read and write SCR. SCR is initialized to H'00 by a reset and in standby
mode.
Bit
Initial value
Read/Write
Transmit interrupt enable
Enables or disables transmit-data-empty interrupts (TXI)
R/W
TIE
7
0
Receive interrupt enable
Enables or disables receive-data-full interrupts (RXI) and
receive-error interrupts (ERI)
R/W
RIE
6
0
Transmit enable
Enables or disables the transmitter
R/W
TE
5
0
447
Receive enable
Enables or disables the receiver
R/W
RE
4
0
Multiprocessor interrupt enable
Enables or disables multiprocessor
interrupts
MPIE
R/W
3
0
Transmit-end interrupt enable
Enables or disables transmit-
end interrupts (TEI)
TEIE
R/W
2
0
Clock enable 1/0
These bits select the
SCI clock source
CKE1
R/W
1
0
CKE0
R/W
0
0