MC908QT4MPE datasheet(17/184 Pages) FREESCALE

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MC68HC908QY/QT Family Data Sheet, Rev. 5

Freescale Semiconductor

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 (VDD)

•

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

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.

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