Hitachi H8/500 Series - Port 2 Port Read

C.2 Schematic Diagram of Port 2
Figure C-2 gives a schematic view of the port 2 input/output circuits.
Table C-2 Port 2 Port Read
Mode Port Read Data
1,2,3,4 DR value
DDR = 0 Pin value
DDR = 1 DR value
WP2D:
WP2:
RP2:
n:
Write to P2DDR
Write to Port 2
Read Port 2
0, 1, 2, 3, or 4
Internal data bus (PDB8 to PDB11)
Mode 1, 2, 3, or 4
Software standby
Bus release
Mode 7
Mode 1, 2, 3, or 4
RP2
Bus control signals
P2n
WP2
C
R
QD
P2 DR
n
C
R
QD
P2 DDR
n
Reset
WP2D
Reset
S
7
Figure C-2 Schematic Diagram of Port 2
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