68HC12 查看數據表（PDF） - Motorola => Freescale

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68HC12

16-bit microcontroller unit (MCU)

Motorola => Freescale 

General Description

General Description

Contents

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

68HC(9)12DG128 Block Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Introduction

The 68HC(9)12DG128 microcontroller unit (MCU) is a 16-bit device

composed of standard on-chip peripherals including a 16-bit central

processing unit (CPU12), 128K bytes of flash EEPROM

(68HC912DG128) or 128K bytes ROM (68HC12DG128), 8K bytes of

RAM, 2K bytes of EEPROM, two asynchronous serial communication

interfaces (SCI), a serial peripheral interface (SPI), an inter-IC interface

(I2C), an enhanced capture timer (ECT), two 8-channel,10-bit

analog-to-digital converters (ATD), a four-channel pulse-width

modulator (PWM), and two CAN 2.0 A, B software compatible modules

(MSCAN12). System resource mapping, clock generation, interrupt

control and bus interfacing are managed by the lite integration module

(LIM). The 68HC(9)12DG128 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. In addition to the I/O ports

available in each module, 16 I/O port pins are available with

Key-Wake-Up capability from STOP or WAIT mode.

1-gen

MOTOROLA

General Description

68HC(9)12DG128 Rev 1.0

11

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