MC68HC908QC16_07 Datasheet, PDF (17/274 Pages) Freescale Semiconductor, Inc – Microcontrollers

Chapter 1
General Description
1.1 Introduction
The MC68HC908QC16, MC68HC908QC8, and MC68HC908QC4 are members 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.
0.4
Table 1-1. Summary of Device Variations
Device
MC68HC908QC16
MC68HC908QC8
MC68HC908QC4
FLASH
Memory Size
16 Kbytes
8 Kbytes
4 Kbytes
RAM
512 bytes
384 bytes
384 bytes
Pin Count
16, 20, 28 pins
16, 20, 28 pins
16, 20, 28 pins
1.2 Features
Features include:
• High-performance M68HC08 CPU core
• Fully upward-compatible object code with M68HC05 Family
• 5.0-V and 3.3-V operating voltages (V_DD)
• 8-MHz internal bus operation at 5 V, 4-MHz at 3.3 V
• Trimmable internal oscillator
– Software selectable 1 MHz, 2 MHz, 3.2 MHz, or 6.4 MHz internal bus operation
– 8-bit trim capability
– ± 25% untrimmed
– Trimmable to approximately 0.4%⁽¹⁾
• Software selectable crystal oscillator range, 32–100 kHz, 1–8 MHz, and 8–32 MHz
• Software configurable input clock from either internal or external source
• Auto wakeup from STOP capability using dedicated internal 32-kHz RC or bus clock source
• FLASH security⁽²⁾
• On-chip in-application programmable FLASH memory (with internal program/erase voltage
generation)
1. See 19.11 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.
MC68HC908QC16 • MC68HC908QC8 • MC68HC908QC4 Data Sheet, Rev. 3
Freescale Semiconductor
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