MC68HC908LJ12 Datasheet, PDF (33/413 Pages) Freescale Semiconductor, Inc – 8-bit microcontroller units

General Description
1.2 Introduction
The MC68HC908LJ12 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.
1.3 Features
Features of the MC68HC908LJ12 include the following:
• High-performance M68HC08 architecture
• Fully upward-compatible object code with M6805, M146805, and
M68HC05 Families
• Maximum internal bus frequency:
– 8-MHz at 5V operating voltage
– 4-MHz at 3.3V operating voltage
• 32-kHz crystal oscillator clock input with 32MHz internal phase-
lock-loop
• Optional continuous crystal oscillator operation in stop mode
• 12k-bytes user program FLASH memory with security¹ feature
• 512 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
• Real time clock (RTC) with clock, calendar, alarm, and
chronograph functions. Selectable periodic interrupt requests for
seconds, minutes, hours, days, 2-Hz, 4-Hz, and 100-Hz
• Serial communications interface module (SCI) with infrared (IR)
encoder/decoder
Technical Data
34
1. No security feature is absolutely secure. However, Freescale’s strategy is to make reading or
copying the FLASH difficult for unauthorized users.
General Description
MC68HC908LJ12 — Rev. 2.1
Freescale Semiconductor