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Chapter 16
Port Functions
Preliminary User’s Manual U15839EE1V0UM00
(2)
Setting in input/output mode and control mode
Port 1 is set in input/output mode using the port 1 mode register (PM1). In control mode, it is set
using the port 1 mode control register (PMC1).
(a) Port 1 mode register (PM1)
This register can be read or written in 8-bit or 1-bit units.
Figure 16-8:
Port 1 Mode Register (PM1)
7
6
5
4
3
2
1
0
Address
At Reset
PM1
PM17
PM16
PM15
PM14
PM13
PM12
PM11
PM10
FFFFF420H
FFH
Bit Position
Bit Name
Function
7 to 0
PM1n
(n = 7 to 0)
Specifies input/output mode of P1n pin.
0: Output mode (Output buffer on)
1: Input mode (Output buffer off)
Summary of Contents for mPD703128
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