Description

The MC68HC908JL8 is a member of the low-cost, high-performance

M68HC08 Family of 8-bit microcontroller units (MCUs). The M68HC08 Family

is a Complex Instruction Set Computer (CISC) with a Von Neumann

architecture. All MCUs in the family use the enhanced M68HC08 central

processor unit (CPU08) and are available with a variety of modules, memory

sizes and types, and package types.

Features

Features include:

• High-performance M68HC08 architecture

• Fully upward-compatible object code with M6805, M146805, and

M68HC05 Families

• Low-power design; fully static with stop and wait modes

• Maximum internal bus frequency:

– 8-MHz at 5V operating voltage

– 4-MHz at 3V operating voltage

• Oscillator options:

– Crystal or resonator

– RC oscillator

• 8,192 bytes user program FLASH memory with security(1) feature

• 256 bytes of on-chip RAM

• Two 16-bit, 2-channel timer interface modules (TIM1 and TIM2) with

selectable input capture, output compare, and PWM capability on each

channel; external clock input option on TIM2

• 13-channel, 8-bit analog-to-digital converter (ADC)

• Serial communications interface module (SCI)

• 26 general-purpose input/output (I/O) ports:

– 8 keyboard interrupt with internal pull-up

– 11 LED drivers (sink)

– 2 × 25mA open-drain I/O with pull-up

• System protection features:

– Optional computer operating properly (COP) reset, driven by internal

64-kHz RC oscillator

– Optional low-voltage detection with reset and selectable trip points

for 3V and 5V operation

– Illegal opcode detection with reset

– Illegal address detection with reset

• Master reset pin with internal pull-up and power-on reset

• IRQ with schmitt-trigger input and programmable pull-up

• MC68HC908JL8 is available in these packages:

– 20-pin PDIP (MC68HC908JK8)

– 20-pin SOIC (MC68HC908JK8)

– 28-pin PDIP

– 28-pin SOIC

– 32-pin SDIP

– 32-pin LQFP

• Specific features of the MC68HC908JL8 in 28-pin packages are:

– 23 general-purpose I/Os only

– 7 keyboard interrupt with internal pull-up

– 10 LED drivers (sink)

– 12-channel ADC

– Timer I/O pins on TIM1 only

• Specific features of the MC68HC908JK8 are:

(MC68HC908JL8 in 20-pin packages)

– 15 general-purpose I/Os only

– 1 keyboard interrupt with internal pull-up

– 4 LED drivers (sink)

– 10-channel ADC

– Timer I/O pins on TIM1 only