MC908JL8CDWE Datasheet, PDF (17/212 Pages) Freescale Semiconductor, Inc – Microcontrollers

Chapter 1
General Description
1.1 Introduction
The MC68HC908JL8 is a member of the low-cost, high-performance M68HC08 Family of 8-bit
microcontroller units (MCUs). 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.
Table 1-1. Summary of Devices
Generic Part
MC68HC908JL8
MC68HC908JK8
MC68HC08JL8
MC68HC08JK8
MC68HC908KL8
Description
FLASH part
FLASH part
ROM part for MC68HC908JL8
ROM part for MC68HC908JK8
ADC-less MC68HC908JL8
Pin Count
28 or 32
20
28 or 32
20
28 or 32
1.2 Features
Features of the MC68HC908JL8 include the following:
• 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
1. No security feature is absolutely secure. However, Motorola’s strategy is to make reading or copying the FLASH difficult for
unauthorized users.
MC68HC908JL8/JK8 • MC68HC08JL8/JK8 • MC68HC908KL8 Data Sheet, Rev. 3.1
Freescale Semiconductor
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