MC68HC08JB1 Datasheet, PDF (177/216 Pages) Motorola, Inc – Microcontrollers

11.7 Port Options
All pins of port A, port C, and port E have programmable pullup resistors.
PTD0/1 has LED drive capability. Port pins PTE4 and PTE3 have 10mA
high current drive capability.
11.7.1 Port Option Control Register
The port option control register controls the pullup options for port A, C,
and E pins. It also controls the drive configuration on port D.
Address: $001D
Bit 7
6
5
4
3
2
1
Bit 0
Read:
0
0
PTE20P
PTDILDD PTE4P PTE3P PCP
PAP
Write:
Reset: 0
0
0
0
0
0
0
0
Figure 11-14. Port Option Control Register (POCR)
PTE20P — PTE1 pin Pullup Enable
This read/write bit controls the pullup option for the PTE1 pin. When
set, a pullup device is connected regardless whether the pin is
configured as an input or an output.
1 = Configure PTE1 to have an internal pullup to V_REG
0 = Disconnect PTE1 internal pullup
PTDILDD — Infrared LED Drive Control
This read/write bit controls the output current capability of PTD0/1 pin.
When set, the PTD0/1 pin has 50mA current sink capability. An
infrared LED can be connected directly between the PTD0/1 and V_DD.
1 = PTD0/1 configured for infrared LED drive capability;
when the pin is set as an output, the pin is an open-drain pin
with 50mA current sink capability
0 = PTD0/1 configured as a standard open-drain I/O port pin
MC68HC08JB1 — Rev. 2.1
Freescale Semiconductor
Technical Data
177