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Appendix C I/O Port Block Diagrams
C.1
Port 1 Block Diagram
Hardware standby
P1
n
WP1D:
Write to P1DDR
WP1:
Write to port 1
RP1:
Read port 1
SSOE:
Software standby output port enable
n = 0 to 7
Software
SSOE
standby
Mode 6/7
External bus
released
Mode 6/7
Mode
1 to 5
Figure C.1 Port 1 Block Diagram
Appendix C I/O Port Block Diagrams
Reset
Mode 1 to 4
Q
P1 DDR
n
C
WP1D
Reset
Q
P1 DR
n
C
WP1
RP1
Rev. 4.00 Jan 26, 2006 page 879 of 938
R
D
R
D
REJ09B0276-0400
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