Datasheet

MC68HC908QY/QT Family Data Sheet, Rev. 6
Freescale Semiconductor 17
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
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)
Table 1-1. Summary of Device Variations
Device
FLASH
Memory Size
Analog-to-Digital
Converter
Pin
Count
MC68HC908QT1 1536 bytes — 8 pins
MC68HC908QT2 1536 bytes 4 ch, 8 bit 8 pins
MC68HC908QT4 4096 bytes 4 ch, 8 bit 8 pins
MC68HC908QY1 1536 bytes — 16 pins
MC68HC908QY2 1536 bytes 4 ch, 8 bit 16 pins
MC68HC908QY4 4096 bytes 4 ch, 8 bit 16 pins
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.