HD6475348R Datasheet, PDF (458/487 Pages) Hitachi Semiconductor – Single-Chip Microcomputer

C.6 Schematic Diagram of Port 6
Figure C-6 gives a schematic view of the port 6 input/output circuits.
MOS
pull-up
P60
Mode 1, 2, or 7
Mode 3 or 4
Mode 3 or 4
Bus release
Software
standby
Mode 4
Mode 3
Mode 3
Reset
SR
Q
D
P6 0 DDR
C
WP6D
Reset
R
Q
D
P6 0 DR
C
WP6
RP6
WP6D: Write to P6DDR
WP6: Write to Port 6
RP6: Read Port 6
System control
register 2, Bit 3
IRQ2 E
Q
Falling edge
detector
IRQ2 to CPU
Figure C-6 (a) Schematic Diagram of Port 6, Pin P60
Table C-6 (a) Port 6 Port Read (Pin P60)
Mode
3
1, 2, 4, 7 IRQ2E = 0
IRQ2E = 1
DDR = 0
DDR = 1
Port Read Data
DR value
Pin value
DR value
Pin value
448