HD643303x Hitachi, HD643303x Datasheet - Page 289

• Manufacturer Part Number: HD643303x
• Description: Hitachi Microcomputer
• Manufacturer: Hitachi

9.2.3 Port B Data Direction Register (PBDDR)
PBDDR is an 8-bit write-only register that selects input or output for each pin in port B.
Port B is multiplexed with pins TP
be set to 1. For further information about PBDDR, see section 7.11, Port B.
9.2.4 Port B Data Register (PBDR)
PBDR is an 8-bit readable/writable register that stores TPC output data for groups 2 and 3, when
these TPC output groups are used.
For further information about PBDR, see section 7.11, Port B.
Bit
Initial value
Read/Write
Bit
Initial value
Read/Write
Note:
*
Bits selected for TPC output by NDERB settings become read-only bits.
PB DDR
R/(W)
PB
7
W
7
0
0
7
7
*
PB DDR
R/(W)
PB
6
W
6
0
0
6
6
*
15
PB DDR
to TP
R/(W)
PB
5
W
5
0
0
5
8
5
. Bits corresponding to pins used for TPC output must
*
Port B data direction 7 to 0
These bits select input or
output for port B pins
Port B data 7 to 0
These bits store output data
for TPC output groups 2 and 3
PB DDR
274
R/(W)
PB
4
W
4
0
0
4
4
*
PB DDR
R/(W)
PB
3
W
0
3
0
3
3
*
PB DDR
R/(W)
PB
2
W
0
2
0
2
2
*
PB DDR
R/(W)
PB
1
W
0
1
0
1
1
*
PB DDR
R/(W)
PB
0
W
0
0
0
0
0
*