HD6433308 Datasheet, PDF (96/349 Pages) Hitachi Semiconductor – Hitachi Single-Chip MicroComputer

P1n •
Hardware standby
•
Mode 3
•
Mode 1 or 2
Mode 1 Reset
S* R
•^Q
D
P1n DDR
C*
WP1D
Reset
R
Q
D
P1n DR
C
WP1
•
•
•
RP1
WP1D: Write Port 1 DDR
WP1: Write Port 1
RP1: Read Port 1
n =0 to7
* Set-priority
Figure 5-1. Port 1 Schematic Diagram
5.3 Port 2
Port 2 is an 8-bit input/output port that also provides the high bits of the address bus. The function
of port 2 depends on the MCU mode as indicated in Table 5-4.
Table 5-4. Functions of Port 2
Mode 1
Mode 2
Mode 3
Address bus (High)
Input port or
Input/output port
(A15 to A8)
Address bus (High)
(A15 to A8)*
* Depending on the bit settings in the data direction register: 0—input pin; 1—address pin
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