mc68hc908gp20 Freescale Semiconductor, Inc, mc68hc908gp20 Datasheet - Page 240

• Manufacturer Part Number: mc68hc908gp20
• Description: M68hc08 Family Of 8-bit Microcontroller Units Mcus
• Manufacturer: Freescale Semiconductor, Inc

16.6.3 Port D Input Pullup Enable Register
16.7 Port E
Advance Information
240
Address:
Reset:
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.
PTDPUE7–PTDPUE0 — Port D Input Pullup Enable Bits
Port E is a 2-bit special-function port that shares two of its pins with the
serial communications interface (SCI) module.
Read:
Write:
Figure 16-16. Port D Input Pullup Enable Register (PTDPUE)
These writeable 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
PTDPUE7 PTDPUE6 PTDPUE5 PTDPUE4 PTDPUE3 PTDPUE2 PTDPUE1 PTDPUE0
$000F
Bit 7
0
6
0
5
0
4
0
3
0
MC68HC908GP20
Freescale Semiconductor
2
0
1
0
—
Rev 2.1
Bit 0
0