HD6433308 HITACHI [Hitachi Semiconductor], HD6433308 Datasheet - Page 96

• Manufacturer Part Number: HD6433308
• Description: Hitachi Single-Chip MicroComputer
• Manufacturer: HITACHI [Hitachi Semiconductor]

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
Address bus (High)
(A
* Depending on the bit settings in the data direction register: 0—input pin; 1—address pin
15
to A
P1
n
8
)
•
Hardware standby
Mode 2
Input port or
Address bus (High)
(A
15
Figure 5-1. Port 1 Schematic Diagram
Mode 1 or 2
to A
8
Mode 3
)*
•
81
•
Mode 3
Input/output port
WP1D: Write Port 1 DDR
WP1:
RP1:
n =0 to7
* Set-priority
•
•
•
Write Port 1
Read Port 1
Mode 1 Reset
RP1
Q
P1n DR
Q
P1n DDR
S*
WP1D
WP1
Reset
C
C
R
•
R
D
D
*