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Appendix C I/O Port Block Diagrams
C.1 Port 1 Block Diagram
Software standby
Hardware standby
P1
n
WP1D:
Write to P1DDR
WP1:
Write to port 1
RP1:
Read port 1
n = 0 to 7
Set priority
*:
Mode 3
Mode 3
Mode 1/2
Figure C-1 Port 1 Block Diagram
Mode 1
to
mode 3
Reset
R
Q
D
P1
DDR
n
C
*
WP1D
Reset
R
Q
D
P1
DDR
n
C
WP1
RP1
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