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Chapter 16
Port Functions
Preliminary User’s Manual U15839EE1V0UM00
(2)
Setting in input/output mode and control mode
Port AH is set in input/output mode using the port AH mode register (PMAH). In control mode, it is
set using the port AH mode control register (PMCAH).
(a) Port AH mode register (PMAH)
This register can be read or written in 8-bit or 1-bit units.
Figure 16-30:
Port AH Mode Register (PMAH)
(b) Port AH mode control register (PMCAH)
This register can be read or written in 8-bit or 1-bit units.
Figure 16-31:
Port AH Mode Control Register (PMCAH)
7
6
5
4
3
2
1
0
Address
At Reset
PMAH
PMAH7 PMAH6 PMAH5 PMAH4 PMAH3 PMAH2 PMAH1 PMAH0 FFFF022FH
00H
Bit Position
Bit Name
Function
7 to 0
PMAHn
(n = 7 to 0)
Specifies input/output mode of PAHn pin.
0: Output mode (Output buffer on)
1: Input mode (Output buffer off)
7
6
5
4
3
2
1
0
Address
At Reset
PMCAH
PMCAH7
PMCAH6
PMCAH5
PMCAH4
PMCAH3
PMCAH2
PMCAH1
PMCAH0 FFFFF042H
FFH
Bit Position
Bit Name
Function
7 to 0
PMCAHn
(n = 7 to 0)
Specifies operation mode of PMCAHn pin
0: Input/output port mode
1: A23 to A16 address output
Содержание mPD703128
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