C.8 Port B Block Diagram; Port B Block Diagram - Hitachi H8S/2646 Hardware Manual

C.8

Port B Block Diagram

PBn
*1
*2
Legend
WDDRB : Write to PBDDR
WDRB : Write to PBDR
WODRB : Write to PBODR
WPCRB : Write to PBPCR
RDRB : Read PBDR
RPORB : Read port B
RODRB : Read PBODR
RPCRB : Read PBPCR
n= 0 to 7
Figure C-8 Port B Block Diagram (Pins PB0 to PB7)
Q
PBnPCR
WPCRB
Q
PBnDDR
WDDRB
Q
PBnDR
Mode 4/5/6
Address
enable
WDRB
Q
PBnODR
WODRB
Notes: *1 Output enable signal
*2 Open drain control signal
Reset
R
D
C
RPCRB
Reset
R
D
C
Reset
R
D
C
Reset
R
D
C
RODRB
RDRB
RPORB
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