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Bit 5—Address 21 Enable (A
0 in this bit enables A
modified and PA
has its ordinary input/output functions.
6
Bit 5
A
E
Description
21
0
PA
1
PA
Bits 4 to 0—Reserved
116
E): Enables PA
21
address output from PA
21
is the A
address output pin
6
21
is the PA
/TP
/TIOCA
6
6
6
to be used as the A
6
. In modes other than 3 this bit cannot be
6
input/output pin
2
address output pin. Writing
21
(Initial value)
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