HD6475328-CP10 Datasheet, PDF (426/459 Pages) Hitachi Semiconductor – original Hitachi CMOS microcomputer unit (MCU)

C.6 Schematic Diagram of Port 6
Figure C-6 gives a schematic view of the port 6 input/output circuits.
MOS
pull-up
P6n
Mode 3 or 4
Software standby
Bus release
Mode 3
Reset
Mode 1, 2, or 7
Mode 3 or 4
SR
Q
D
P6 n DDR
C
WP6D
Reset
R
Q
D
P6 n DR
C
WP6
WP6D: Write to P6DDR
WP6: Write to Port 6
RP6: Read Port 6
n:
0 to 3
RP6
Figure C-6 Schematic Diagram of Port 6
Table C-6 Port 6 Port Read
Mode
3
1,2,4,7
DDR = 0
DDR = 1
Port Read Data
DR value
Pin value
DR value
417