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User’s Manual U11969EJ3V0UM00
CHAPTER 12 PORT FUNCTION
(2) Setting input/output mode and control mode
The input/output mode of port 5 is set by port mode register 5 (PM5). The control mode (external expansion
mode) is set by mode specification pins MODEn and memory expansion mode register (MM: refer to 3.4.6
(1)) (n = 0 to 2).
Port 5 mode register (PM5)
This register can be read/written in 8- or 1-bit units.
Bit Position
Bit Name
Function
7 to 0
PM5n
Port Mode
(n = 7 to 0)
Sets P5n pin in input/output mode.
0: Output mode (output buffer ON)
1: Input mode (output buffer OFF)
Operation mode of port 5
Bit of MM Register
Operation Mode
MM2
MM1
MM0
P50
P51
P52
P53
P54
P55
P56
P57
0
0
0
Port
0
1
1
1
0
0
Address/data bus
1
0
1
(AD8 to AD15)
1
1
1
Others
RFU (reserved)
7
PM57
PM5
6
PM56
5
PM55
4
PM54
3
PM53
2
PM52
1
PM51
0
PM50
Address
FFFFF02AH
After reset
FFH
Содержание V854 UPD703006
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