Hitachi H8/500 Series - D) Schematic Diagram of Port 1, Pin P1

Table C-1 (d) Port 1 Port Read (Pin P13)
Mode Setting Port Read Data
BRLE = 1 Pin value
1,2,3,4 BRLE DDR = 0 Pin value
= 0 DDR = 1 DR value
DDR = 0 Pin value
DDR = 1 DR value
RP1
BREQ to CPU
P1
3
BRLE
Q
Port 1 control register,
bit 3
Mode 1, 2, 3,
or 4
WP1
C
R
QD
P1 DR
3
C
R
QD
P1 DDR
3
Reset
Reset
WP1D:
WP1:
RP1:
Write to P1DDR
Write to Port 1
Read Port 1
Internal data bus (PDB11)
WP1D
7
Figure C-1 (d) Schematic Diagram of Port 1, Pin P13
409
Downloaded from Elcodis.com electronic components distributor