MC908JB16DWE Datasheet, PDF (37/332 Pages) Freescale Semiconductor, Inc – Microcontrollers

General Description
1.6.12 Port C I/O Pins (PTC1/RxD, PTC0/TxD)
Port C is a 2-bit special function port that shares its pins with the SCI
module. (See Section 14. Input/Output (I/O) Ports.) Each pin contains
a software configurable pullup device to V_DD when the pin is configured
as an input. (See 14.7 Port Options.)
1.6.13 Port D I/O Pins (PTD5–PTD0)
PTD5–PTD0 are general-purpose bidirectional I/O port pins; open-drain
when configured as output. (See Section 14. Input/Output (I/O) Ports.)
PTD5–PTC2 are software configurable to be 10mA sink pins for direct
LED connections. PTD1–PTD0 are software configurable to be 25mA
sink pins for direct infrared LED connections. (See 14.7 Port Options.)
1.6.14 Port E I/O Pins (PTE4/D–, PTE3/D+, PTE2/T2CH01, PTE1/T1CH01, PTE0/TCLK)
Port E is a 5-bit special function port that shares two of its pins with the
USB module and three of its pins with the two timer interface modules.
Each PTE2–PTE0 pin contains a software configurable pullup device to
V_DD when the pin is configured as an input or output.
When the USB module is disabled, the PTE4 and PTE3 pins are
general-purpose bidirectional I/O port pins with 10mA sink capability.
Each pin is open-drain when configured as an output; and each pin
contains a software configurable 5kΩ pullup to V_DD when configured as
an input. The PTE4 pin can also be enabled to trigger the IRQ interrupt.
When the USB module is enabled, the PTE4/D– and PTE3/D+ pins
become the USB module D– and D+ pins. The USB D– pin contains a
1.5kΩ software configurable pullup device to V_REG. (See Section 10.
Timer Interface Module (TIM), Section 11. Universal Serial Bus
Module (USB) and Section 14. Input/Output (I/O) Ports.)
NOTE:
Any unused inputs and I/O ports should be tied to an appropriate logic
level (either V_DD or V_SS). Although the I/O ports of the MC68HC908JB16
do not require termination, termination is recommended to reduce the
possibility of static damage.
MC68HC908JB16 — Rev. 1.1
Freescale Semiconductor
General Description
Technical Data
37