D) Schematic Diagram Of Port 1, Pin P1 - Hitachi H8/500 Series Hardware Manual

P1
3
Table C-1 (d) Port 1 Port Read (Pin P1
Mode
1,2,3,4
7
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Figure C-1 (d) Schematic Diagram of Port 1, Pin P1
Setting
BRLE = 1
BRLE DDR = 0
= 0 DDR = 1
DDR = 0
DDR = 1
Reset
R
Q D
P1 DDR
3
C
WP1D
Reset
R
Q D
P1 DR
3
C
WP1
Mode 1, 2, 3,
or 4
RP1
)
3
Port Read Data
Pin value
Pin value
DR value
Pin value
DR value
409
WP1D: Write to P1DDR
WP1: Write to Port 1
RP1: Read Port 1
Port 1 control register,
bit 3
BRLE
Q
BREQ to CPU
3