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Input/Output (I/O) Ports
16.6.3 Port D Input Pullup Enable Register
16.7 Port E
Technical Data
230
Freescale Semiconductor, Inc.
The port D input pullup enable register (PTDPUE) contains a software
configurable pullup device for each of the eight port D pins. Each bit is
individually configurable and requires that the data direction register,
DDRD, bit be configured as an input. Each pullup is automatically and
dynamically disabled when a port bit's DDRD is configured for output
mode.
Address:
$000F
Bit 7
6
Read:
PTDPUE7 PTDPUE6 PTDPUE5 PTDPUE4 PTDPUE3 PTDPUE2 PTDPUE1 PTDPUE0
Write:
Reset:
0
0
Figure 16-16. Port D Input Pullup Enable Register (PTDPUE)
PTDPUE7–PTDPUE0 — Port D Input Pullup Enable Bits
These writable bits are software programmable to enable pullup
devices on an input port bit.
1 = Corresponding port D pin configured to have internal pullup
0 = Corresponding port D pin has internal pullup disconnected
Port E is a 2-bit special-function port that shares two of its pins with the
serial communications interface (SCI) module.
Input/Output (I/O) Ports
For More Information On This Product,
Go to: www.freescale.com
5
4
3
0
0
0
MC68HC908GP32
2
1
Bit 0
0
0
0
MC68HC08GP32
Rev. 6
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