General Description
Introduction
The MC68H(R)C908JL3E is a member of the low-cost, high-performance M68HC08 Family of 8-bit microcontroller units (MCUs). The M68HC08 Family is based on the customer-specified integrated circuit (CSIC) design strategy. 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 of the MC68H(R)C908JL3E include the following:
• EMC enhanced version of MC68H(R)C908JL3/JK3/JK1
• 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 oscillator for MC68HC908JL3E/JK3E/JK1E
   – RC oscillator for MC68HRC908JL3E/JK3E/JK1E
• User program Flash memory with security(1) feature
   – 4,096 bytes for MC68H(R)C908JL3E/JK3E
   – 1,536 bytes for MC68H(R)C908JK1E
• 128 bytes of on-chip RAM
• 2-channel, 16-bit timer interface module (TIM)
• 12-channel, 8-bit analog-to-digital converter (ADC)
• 23 general purpose I/O ports for MC68H(R)C908JL3E:
   – 7 keyboard interrupt with internal pull-up (6 keyboard interrupt for MC68HC908JL3E)
   – 10 LED drivers (sink)
   – 2 × 25mA open-drain I/O with pull-up
• 15 general purpose I/O ports for MC68H(R)C908JK3E/JK1E:
   – 1 keyboard interrupt with internal pull-up (MC68HRC908JK3E/JK1E only)
   – 4 LED drivers (sink)
   – 2 × 25mA open-drain I/O with pull-up
   – 10-channel ADC
• System protection features:
   – Optional computer operating properly (COP) reset
   – 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
• 28-pin PDIP, 28-pin SOIC, and 48-pin LQFP packages for MC68H(R)C908JL3E
• 20-pin PDIP and 20-pin SOIC packages for MC68H(R)C908JK3E/JK1E