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Appendix C I/O Port Block Diagrams
PB
4
WPBD:
Write to PBDDR
WPB:
Write to port B
RPB:
Read port B
SSOE:
Software standby output port enable
Rev. 4.00 Jan 26, 2006 page 910 of 938
REJ09B0276-0400
Hardware standby
Figure C.11 (e) Port B Block Diagram (Pin PB
External bus release
SSOE
Software standby
Reset
R
Q
D
PB DDR
4
C
WPBD
Reset
R
Q
D
PB DR
4
C
RPB
Note: In modes 6 and 7, CAS output enable is fixed at 0.
TPC
TPC output
enable
Next data
WPB
Output trigger
Bus controller
Output enable
CAS output
)
4
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