MC68HC08JB1 Datasheet, PDF (178/216 Pages) Motorola, Inc – Microcontrollers

PTE4P — Pin PTE4 Pullup Enable
This read/write bit controls the pullup option for the PTE4 pin. When
set, a pullup device is connected when the pin is configured as an
input and the USB module is disabled.
1 = Configure PTE4 to have an internal pullup to V_DD
0 = Disconnect PTE4 internal pullup
NOTE:
When the USB module is enabled, the pullup controlled by PTE4P is
disconnected; PTE4/D– pin functions as D– which has a 1.5kΩ
programmable pull-up resistor. (See 9.8.8 USB Control Register 3.)
The pullup controlled by PTE4P is a pullup to V_DD, as oppose to V_REG.
PTE3P — Pin PTE3 Pullup Enable
This read/write bit controls the pullup option for the PTE3 pin. When
set, a pullup device is connected when the pin is configured as an
input and the USB module is disabled.
1 = Configure PTE3 to have an internal pullup to V_DD
0 = Disconnect PTE3 internal pullup
NOTE:
The pullup controlled by PTE3P is a pullup to V_DD, as oppose to V_REG.
PCP — Port C Pullup Enable
This read/write bit controls the pullup option for the PTC0 pin. When
set, a pullup device is connected when the pin is configured as an
input.
1 = Configure PTC0 to have an internal pullup to V_REG
0 = Disconnect PTC0 internal pullup
PAP — Port A Pullup Enable
This read/write bit controls the pullup option for the PTA7–PTA0 pins.
When set, a pullup device is connected when a pin is configured as
an input.
1 = Configure port A to have internal pullups to V_REG
0 = Disconnect port A internal pullups
Technical Data
178
MC68HC08JB1 — Rev. 2.1
Freescale Semiconductor