MC68HC908GT16 Datasheet, PDF (244/412 Pages) Motorola, Inc – Microcontrollers

Input/Output (I/O) Ports
16.6.3 Port D Input Pullup Enable Register
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
5
4
3
2
1
Bit 0
Read:
PTDPUE7 PTDPUE6 PTDPUE5 PTDPUE4 PTDPUE3 PTDPUE2 PTDPUE1 PTDPUE0
Write:
Reset: 0
0
0
0
0
0
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
Technical Data
244
MC68HC908GT16 • MC68HC908GT8 — Rev. 2
Input/Output (I/O) Ports
MOTOROLA