HD6475348R Datasheet, PDF (454/487 Pages) Hitachi Semiconductor – Single-Chip Microcomputer

C.2 Schematic Diagram of Port 2
Figure C-2 gives a schematic view of the port 2 input/output circuits.
Mode 1, 2, 3, or 4
Software standby
Bus release
Reset
SR
QD
WP2D: Write to P2DDR
WP2: Write to Port 2
RP2: Read Port 2
n:
0, 1, 2, 3, or 4
P2 n DDR
C
Mode 7
WP2D
Reset
R
P2n
QD
P2 n DR
C
Mode 1, 2, 3, or 4
WP2
RP2
Bus control signals
Figure C-2 Schematic Diagram of Port 2
Table C-2 Port 2 Port Read
Fig. C-2
Mode
1, 2, 3, 4
7
DDR = 0
DDR = 1
Port Read Data
DR value
Pin value
DR value
444