C.7 Port A Block Diagram; Port A Block Diagram - Hitachi H8S/2646 Hardware Manual

C.7

Port A Block Diagram

PAn
Legend
WDDRA
WDRA
WODRA
WPCRA
RDRA
RPORA
RODRA
RPCRA
n = 0 to 7
Figure C-7 Port A Block Diagram (Pins PA0 to PA7)
1096
*1
*2
Notes: *1 Output enable signal
: Write to PADDR
: Write to PADR
: Write to PAODR
: Write to PAPCR
: Read PADR
: Read port A
: Read PAODR
: Read PAPCR
Reset
R
Q D
PAnPCR
C
WPCRA
RPCRA
Reset
R
Q D
PAnDDR
C
WDDRA
Reset
R
Q D
PAnDR
Mode4/5/6
C
Address
enable
WDRA
Reset
R
Q D
PAnODR
C
WODRA
RODRA
RDRA
RPORA
*2 Open drain control signal