S12CPUV2 datasheet(25/138 Pages) MOTOROLA

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MC9S12DT128 Device User Guide — V02.09

Section 1 Introduction

1.1 Overview

The MC9S12DT128 microcontroller unit (MCU) is a 16-bit device composed of standard on-chip

peripherals including a 16-bit central processing unit (HCS12 CPU), 128K bytes of Flash EEPROM, 8K

bytes of RAM, 2K bytes of EEPROM, two asynchronous serial communications interfaces (SCI), two

serial peripheral interfaces (SPI), an 8-channel IC/OC enhanced capture timer, two 8-channel, 10-bit

analog-to-digital converters (ADC), an 8-channel pulse-width modulator (PWM), a digital Byte Data Link

Controller (BDLC), 29 discrete digital I/O channels (Port A, Port B, Port K and Port E), 20 discrete digital

I/O lines with interrupt and wakeup capability, three CAN 2.0 A, B software compatible modules

(MSCAN12), a Byteflight module and an Inter-IC Bus. The MC9S12DT128 has full 16-bit data paths

throughout. However, the external bus can operate in an 8-bit narrow mode so single 8-bit wide memory

can be interfaced for lower cost systems. The inclusion of a PLL circuit allows power consumption and

performance to be adjusted to suit operational requirements.

1.2 Features

•

HCS12 Core

–

16-bit HCS12 CPU

i. Upward compatible with M68HC11 instruction set

ii. Interrupt stacking and programmer’s model identical to M68HC11

iii. 20-bit ALU

iv. Instruction queue

v. Enhanced indexed addressing

–

MEBI (Multiplexed External Bus Interface)

–

MMC (Module Mapping Control)

–

INT (Interrupt control)

–

BKP (Breakpoints)

–

BDM (Background Debug Module)

•

CRG (Clock and Reset Generator)

–

Choice of low current Colpitts oscillator or standard Pierce Oscillator

–

PLL

–

COP watchdog

–

real time interrupt

–

clock monitor

•

8-bit and 4-bit ports with interrupt functionality

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