Hitachi H8S/2646 Hardware Manual page 1136

Hitachi 16-bit single-chip microcomputer h8s/2646 series
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PF4
Legend
WDDRF
WDRF
RDRF
RPORF
1104
Mode 4/5/6
: Write to PFDDR
: Write to PFDR
: Read PFDR
: Read port F
Figure C-12 (d) Port F Block Diagram (Pin PF4)
Reset
R
Q
D
PF4DDR
C
WDDRF
Reset
R
Q
D
PF4DR
C
WDRF
Bus controller
HWR output
RDRF
RPORF

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