Organization of banks
The I/O digital bank has a total of 24 I/O lines connected to a 26-pin header. The
lines are configured into three groups: ports A, B and C, each group consisting of 8
bits. Any of the lines at ports A, B or C can be configured individually as inputs or
outputs.
Figure 8–2
Organization of banks
Port addressing
Ports A, B, C and the control register are addressable. The base I/O address is set
at 1050h. Ports A, B, C and the control register are addressable, with reference to
the base address.
J7, Digital I/O
8
8
8
Port C
Port B
Port A
Control
Register
Base
1050h
Base + 1
1051h
Base + 2
1052h
Base + 3
1053h
66
Содержание 5266
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