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9.2 Register Descriptions
9.2.1 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.
Bit
7
PA DDR
PA DDR
7
6
Initial value
0
Read/Write
W
W
Port A is multiplexed with pins TP
be set to 1. For further information about PADDR, see section 7.10, Port A.
9.2.2 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.
Bit
7
PA
PA
7
Initial value
0
Read/Write
R/(W)
*
R/(W)
Note:
*
Bits selected for TPC output by NDERA settings become read-only bits.
For further information about PADR, see section 7.10, Port A.
6
5
4
3
PA DDR
PA DDR
PA DDR
5
4
3
0
0
0
0
W
W
W
Port A data direction 7 to 0
These bits select input or
output for port A pins
to TP
. Bits corresponding to pins used for TPC output must
7
0
6
5
4
3
PA
PA
PA
6
5
4
0
0
0
0
*
R/(W)
*
R/(W)
*
R/(W)
Port A data 7 to 0
These bits store output data
for TPC output groups 0 and 1
273
2
1
0
PA DDR
PA DDR
PA DDR
2
1
0
0
0
0
W
W
W
2
1
0
PA
PA
PA
3
2
1
0
0
0
0
*
R/(W)
*
R/(W)
*
R/(W)
*
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