configuration. Table 4-2 illustrates how the port configuration is derived
from the control word.
Table 4-2. D e r i v a t i o n of Port Configuration f r o m Control Word
Bit
Bit #
7
0
1
6 and 5 0 0
01
10
1X
4
0
1
3
2
1
0
0
1
0
1
0
1
0
1
Setting C o n f i g u r a t i o n
Bit set/reset mode for PCO to PC7
Mode set active for PCO to PC7
Mode 0 for PA4 to PA7 and PC4 to PC7
Mode 1 for PA4 to PA7 and PC4 to PC7
Mode 2 for PA4 to PA7 and PC4 to PC7
Mode 2 for PA4 to PA7 and PC4 to PC7
PA output
PA input
PC4 to PC7 output
PC4 to PC7 input
PBO to PB3 and PCO to PC3 output
PBO to PB3 and PCO to PC3 input
PB output
PB input
PCO to PC3 output
PCO to PC3 input
4-3
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