MC68HC08LT8 Data Sheet, Rev. 1
Freescale Semiconductor
13
Chapter 1
General Description
1.1 Introduction
The MC68HC08LT8 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.
1.2 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:
–
4-MHz at 5-V operating voltage
–
2-MHz at 3-V operating voltage
Dual oscillator module
–
32.768kHz crystal oscillator
–
1 to 16MHz crystal oscillator
8,192 bytes user read-only memory (ROM) with security
(1)
128 bytes of on-chip random-access memory (RAM)
Two 16-bit, 2-channel timer interface modules (TIM1 and TIM2) with selectable input capture,
output compare, and pulse-width modulation (PWM) capability on each channel
Programmable periodic interrupt (PPI)
4/3 backplanes and static with maximum 24/25 frontplanes liquid crystal display (LCD) driver
Up to 38 general-purpose input/output (I/O) ports:
–
4 keyboard interrupt with internal pull up
–
2
×
15 mA high current sink pins
System protection features:
–
Optional computer operating properly (COP) reset
–
Optional low-voltage detection with reset and selectable trip points for 3-V and 5-V 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
44-pin low-profile quad flat pack (LQFP)
1. No security feature is absolutely secure. However, Freescale’s strategy is to make reading or copying the ROM difficult for
unauthorized users.