MC68HC908KX2 MOTOROLA [Motorola, Inc], MC68HC908KX2 Datasheet - Page 154
MC68HC908KX2
Manufacturer Part Number
MC68HC908KX2
Description
Microcontrollers
Manufacturer
MOTOROLA [Motorola, Inc]
Datasheet
1.MC68HC908KX2.pdf
(311 pages)
- Current page: 154 of 311
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Input/Output (I/O) Ports
10.3.3 Port A Input Pullup Enable Register
10.4 Port B
Technical Data
154
Address:
The port A input pullup enable register (PTAPUE) contains a software
configurable pullup device for each of the five port A pins. Each bit is
individually configurable and requires that the data direction register,
DDRA, bit be configured as an input. Each pullup is automatically
disabled when a port bit’s DDRA is configured for output mode.
PTAPUE4–PTAPUE0 — Port A Input Pullup Enable Bits
Port B is an 8-bit special-function port that shares four of its pins with the
analog-to-digital converter module (ADC), two with the serial
communication interface module (SCI) and two with an optional external
clock source.
Reset:
Read:
Write:
These writable bits are software programmable to enable pullup
devices on an input port bit.
Figure 10-5. Port A Input Pullup Enable Register (PTAPUE)
1 = Corresponding port A pin configured to have internal pullup
0 = Corresponding port A pin has internal pullup disconnected
$000D
Bit 7
0
0
Input/Output (I/O) Ports
= Unimplemented
MC68HC908KX8 • MC68HC908KX2 • MC68HC08KX8 — Rev. 1.0
6
0
0
5
0
0
PTAPUE4 PTAPUE3 PTAPUE2 PTAPUE1 PTAPUE0
4
0
3
0
2
0
1
0
MOTOROLA
Bit 0
0
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