MC68HC908QL4 Datasheet, PDF (19/226 Pages) Motorola, Inc – Microcontrollers

Chapter 1
General Description
1.1 Introduction
The MC68HC908QL4 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 CPU core
• Fully upward-compatible object code with M68HC05 Family
• 5-V and 3.3-V operating voltages (V_DD)
• 8-MHz internal bus operation at 5 V, 4-MHz at 3.3 V
• Software configurable input clock from either internal or external source
• Trimmable internal oscillator
– Selectable 1 MHz, 2 MHz, or 3.2MHz or 6.4 MHz internal bus operation
– 8-bit trim capability
– Trimmable to approximately 0.4%⁽¹⁾
– ± 25% untrimmed
• Software selectable crystal oscillator range, 32–100 kHz, 1–8 MHz, and 8–32 MHz
• Auto wakeup from STOP capability using dedicated internal 32-kHz RC or bus clock source
• On-chip in-application programmable FLASH memory
– Internal program/erase voltage generation
– Monitor ROM containing user callable program/erase routines
– FLASH security⁽²⁾
• On-chip random-access memory (RAM)
1. See 17.11 Oscillator Characteristics for internal oscillator specifications
2. No security feature is absolutely secure. However, Freescale’s strategy is to make reading or copying the FLASH difficult for
unauthorized users.
MC68HC908QL4 Data Sheet, Rev. 7
Freescale Semiconductor
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