MC68HC908GT16 Datasheet, PDF (239/412 Pages) Motorola, Inc – Microcontrollers

Input/Output (I/O) Ports
Port C
16.5.3 Port C Input Pullup Enable Register
The port C input pullup enable register (PTCPUE) contains a software
configurable pullup device for each of the seven port C pins. Each bit is
individually configurable and requires that the data direction register,
DDRC, bit be configured as an input. Each pullup is automatically and
dynamically disabled when a port bit’s DDRC is configured for output
mode.
Address: $000E
Bit 7
6
5
4
3
2
1
Bit 0
Read: 0
PTCPUE6 PTCPUE5 PTCPUE4 PTCPUE3 PTCPUE2 PTCPUE1 PTCPUE0
Write:
Reset: 0
0
0
0
0
0
0
0
= Unimplemented
Figure 16-12. Port C Input Pullup Enable Register (PTCPUE)
PTCPUE6–PTCPUE0 — Port C Input Pullup Enable Bits
These writable bits are software programmable to enable pullup
devices on an input port bit.
1 = Corresponding port C pin configured to have internal pullup
0 = Corresponding port C pin internal pullup disconnected
MC68HC908GT16 • MC68HC908GT8 — Rev. 2
MOTOROLA
Input/Output (I/O) Ports
Technical Data
239