Table of Contents
Advertisement
12.3.6 Port 5
Port 5 is an 8-bit input/output port that can be set in the input or output mode in 1-bit units.
7
6
P5
P57
P56
Bit Position
Bit Name
7 to 0
P5n
(n = 7 to 0)
In addition to the function as a general I/O port, this port also serves as an external address/data bus for external
memory expansion, when placed in the control mode (external expansion mode).
(1) Operation in control mode
Port
Port 5
P50 to P57
CHAPTER 12 PORT FUNCTION
5
4
3
P55
P54
P53
P52
Port 5
I/O port
Control Mode
AD8 to AD15 Address/data bus for external memory
User's Manual U11969EJ3V0UM00
2
1
0
P51
P50
Function
Function in Control Mode
Address
After reset
FFFFF00AH
Undefined
Block Type
E
359
Advertisement
Table of Contents
