HD6433044 Hitachi Semiconductor, HD6433044 Datasheet - Page 411

• Manufacturer Part Number: HD6433044
• Description: (HD64 Series) Hitachi Single-Chip Microcomputer
• Manufacturer: Hitachi Semiconductor

11.2 Register Descriptions
11.2.1 Port A Data Direction Register (PADDR)
PADDR is an 8-bit write-only register that selects input or output for each pin in port A.
Port A is multiplexed with pins TP
be set to 1. For further information about PADDR, see section 9.11, Port A.
11.2.2 Port A Data Register (PADR)
PADR is an 8-bit readable/writable register that stores TPC output data for groups 0 and 1, when
these TPC output groups are used.
For further information about PADR, see section 9.11, Port A.
Bit
Initial value
Read/Write
Bit
Initial value
Read/Write
Note:
*
Bits selected for TPC output by NDERA settings become read-only bits.
PA DDR
R/(W)
PA
7
W
0
7
0
7
7
*
PA DDR
R/(W)
PA
6
W
0
6
0
6
6
*
7
to TP
PA DDR
R/(W)
PA
5
W
0
5
0
5
0
5
. Bits corresponding to pins used for TPC output must
*
Port A data direction 7 to 0
These bits select input or
output for port A pins
Port A data 7 to 0
These bits store output data
for TPC output groups 0 and 1
PA DDR
399
R/(W)
PA
4
W
0
4
0
4
4
*
PA DDR
R/(W)
PA
3
W
0
3
0
3
3
*
PA DDR
R/(W)
PA
2
W
0
2
0
2
2
*
PA DDR
R/(W)
PA
1
W
0
1
0
1
1
*
PA DDR
R/(W)
PA
0
W
0
0
0
0
0
*