Serial Port Control Register (Spcr) - Hitachi HD6473867 Hardware Manual

10.2.10 Serial Port Control Register (SPCR)

Bit
—
Initial value
Read/Write —
SPCR is an 8-bit readable/writable register that performs RXD
input/output data inversion switching. SPCR is initialized to H'C0 by a reset.
Bit 0: RXD pin input data inversion switch
31
Bit 0 specifies whether or not RXD
Bit 0
SCINV0 Description
0 RXD
31
1 RXD
31
Bit 1: TXD pin output data inversion switch
31
Bit 1 specifies whether or not TXD
Bit 1
SCINV1 Description
0 TXD
31
1 TXD
31
Bit 2: RXD pin input data inversion switch
32
Bit 2 specifies whether or not RXD
Bit 2
SCINV2 Description
0 RXD
32
1 RXD
32
7 6
— SPC32
1 1
— R/W
pin input data is to be inverted.
31
input data is not inverted
input data is inverted
pin output data is to be inverted.
31
output data is not inverted
output data is inverted
pin input data is to be inverted.
32
input data is not inverted
input data is inverted
5 4 3
SPC31 SCINV3
0 0 0
R/W R/W
269
2 1
SCINV2 SCINV1
0 0
R/W R/W
, RXD , TXD , and TXD
31 32 31
0
SCINV0
0
R/W
pin
32
(initial value)
(initial value)
(initial value)