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CHAPTER 4 PORT FUNCTIONS
User’s Manual U15798EJ2V0UD
(4) Pin function switching registers (PF8 to PF11)
These registers are used to select if ports 8 to 11 are used as port pins or segment pins in 1-bit units.
PF8 to PF11 are set by a 1-bit or 8-bit memory manipulation instruction.
RESET input sets the values of these registers to 00H.
Figure 4-21. Format of Pin Function Switching Registers (PF8 to PF11)
PFmn
Pin settings
0
I/O port
1
Segment output
Cautions 1. The pins specified as segment output pins by PF8 to PF11 can output their signals regardless
of the value of the corresponding port mode register (PM8 to PM11).
2. PF8 to PF11 can be set only once after a reset. To change the settings, a reset must be
performed beforehand.
Remark
m = 8 to 11, n = 0 to 7
Symbol
PF9
Address: FF59H After reset: 00H R/W
7
PF87
Symbol
PF8
6
PF86
5
PF85
4
PF84
3
PF83
2
PF82
1
PF81
0
PF80
7
PF97
6
PF96
5
PF95
4
PF94
3
PF93
2
PF92
1
PF91
0
PF90
Address: FF58H After reset: 00H R/W
Symbol
PF11
Address: FF5BH After reset: 00H R/W
7
PF107
Symbol
PF10
6
PF106
5
PF105
4
PF104
3
PF103
2
PF102
1
PF101
0
PF100
7
0
6
0
5
0
4
0
3
PF113
2
PF112
1
PF111
0
PF110
Address: FF5AH After reset: 00H R/W
Содержание mPD780344 Series
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