HD643303x Hitachi, HD643303x Datasheet - Page 336

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HD643303x

Manufacturer Part Number
HD643303x
Description
Hitachi Microcomputer
Manufacturer
Hitachi
Datasheet
11.2.6 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
321
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

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