MC68HC08JB1 Datasheet, PDF (31/216 Pages) Motorola, Inc – Microcontrollers

Table 1-1. Summary of Pin Functions
PIN NAME
V_DD
V_SS
V_REG
RST
IRQ
PIN DESCRIPTION
Power supply.
Power supply ground.
3.3V regulated output from MCU.
Reset input; active low.
With internal pullup to V_DD and schmitt trigger input.
External IRQ pin; with programmable internal pullup to
V_DD and schmitt trigger input.
Used for mode entry selection.
IN/OUT
IN
OUT
OUT
IN/OUT
IN
IN
OSC1
Crystal oscillator input.
IN
OSC2
Crystal oscillator output; inverting of OSC1 signal.
OUT
PTA0/KBA0
:
PTA7/KBA7
PTC0
8-bit general-purpose I/O port.
Pins as keyboard interrupts, KBA0–KBA7.
Each pin has programmable internal pullup to V_REG
when configured as input.
General-purpose I/O pin.
Pin has programmable internal pullup to V_REG when
configured as input.
IN/OUT
IN
IN
IN/OUT
IN
PTD0/1
General-purpose I/O pin;
open-drain when configured as output.
Pin has configurable 50mA sink for infrared LED.
IN
OUT
OUT
PTE1/TCH0
General-purpose I/O pin.
Pin has programmable internal pullup to V_REG when
configured as input or output.
Pin as TCH0 of timer interface module.
IN/OUT
IN/OUT
IN/OUT
PTE3–PTE4 are general-purpose I/O pins;
open-drain when configured as output.
IN
OUT
PTE3/D+
PTE4/D–
PTE3–PTE4 have programmable internal pullup to V_DD
when configured as input.
Pin as D+ of USB module.
IN
IN/OUT
Pin as D– of USB module.
IN/OUT
Pin as additional IRQ interrupt.
IN
VOLTAGE LEVEL
4.0 to 5.5V
0V
V_REG (3.3V)
V_DD
V_DD
V_REG to V_DD+V_HI
V_REG
V_REG
V_REG
V_REG
V_REG
V_REG
V_REG
V_REG
V_REG or V_DD
V_REG or V_DD
V_REG
V_REG
V_REG
V_DD
V_REG or V_DD
V_DD
V_REG
V_REG
V_DD
MC68HC08JB1 — Rev. 2.1
Freescale Semiconductor
Technical Data
31