MC68HC908QY4CDW Datasheet, PDF (17/184 Pages) Freescale Semiconductor, Inc – Microcontrollers

Chapter 1
General Description
1.1 Introduction
The MC68HC908QY4 is a member of the low-cost, high-performance M68HC08 Family of 8-bit
microcontroller units (MCUs). The M68HC08 Family is a Complex Instruction Set Computer (CISC) with
a Von Neumann architecture. 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
MC68HC908QT1
MC68HC908QT2
MC68HC908QT4
MC68HC908QY1
MC68HC908QY2
MC68HC908QY4
FLASH
Memory Size
1536 bytes
1536 bytes
4096 bytes
1536 bytes
1536 bytes
4096 bytes
Analog-to-Digital
Converter
—
4 ch, 8 bit
4 ch, 8 bit
—
4 ch, 8 bit
4 ch, 8 bit
Pin
Count
8 pins
8 pins
8 pins
16 pins
16 pins
16 pins
1.2 Features
Features include:
• High-performance M68HC08 CPU core
• Fully upward-compatible object code with M68HC05 Family
• 5-V and 3-V operating voltages (V_DD)
• 8-MHz internal bus operation at 5 V, 4-MHz at 3 V
• Trimmable internal oscillator
– 3.2 MHz internal bus operation
– 8-bit trim capability allows 0.4% accuracy⁽¹⁾
– ± 25% untrimmed
• Auto wakeup from STOP capability
• Configuration (CONFIG) register for MCU configuration options, including:
– Low-voltage inhibit (LVI) trip point
• In-system FLASH programming
• FLASH security⁽²⁾
1. The oscillator frequency is guaranteed to ±5% over temperature and voltage range after trimming.
2. No security feature is absolutely secure. However, Freescale’s strategy is to make reading or copying the FLASH difficult for
unauthorized users.
MC68HC908QY/QT Family Data Sheet, Rev. 6
Freescale Semiconductor
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