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Overview

Freescale Semiconductor’s HCS12 Family of microcontrollers (MCUs) is the next generation of the highly successful 68HC12 architecture. Using Freescale’s industry-leading 0.25 μs Flash, the MC9S12DG256 is part of a pin-compatible family that scales from 32 KB to 512 KB of Flash memory. The MC9S12DG256 provides an upward migration path from Freescale’s 68HC08, 68HC11 and 68HC12 architectures for applications that need larger memory, more peripherals and higher performance. Also, with the increasing number of CAN-based electronic control units (ECUs), its multiple network modules support this environment by enabling highly efficient communications between different network buses.

Features

High-Performance 16-bit HCS12 CPU Core

> 25 MHz bus operation at 5V for 40 ns minimum instruction cycle time

On-Chip Debug Interface

> Dedicated serial debug interface

> On-chip breakpoints

Network Modules

> Two msCAN modules implementing the CAN 2.0 A/B protocol

? Five receive buffers per module with FIFO storage scheme

? Three transmit buffers per module with internal prioritization

Integrated Third-Generation Flash Memory

> In-application reprogrammable

> Self-timed, fast programming

? Fast Flash page erase—20 ms (512 bytes)

? Can program 16 bits in 20 μs while in burst mode

> 5V Flash program/erase/read

> Flash granularity—512 byte Flash erase/2 byte Flash program

> Four independently programmable Flash arrays

> Flexible block protection and security

4 KB Integrated EEPROM

> Flexible protection scheme for protection against accidental program or erase

> EEPROM can be programmed in 46 μs

10-bit Analog-to-Digital Converter (ADC)

> Two 8-channel ADC

> 7 μs, 10-bit single conversion time, scan mode available

Clock Generation Module with Phase-Lock Loop (PLL)

> Clock monitor with self clock mode in case of no external clock

> Programmable clock frequency with 1024 options ranging from divide by 16 to multiply by 64 from base oscillator

> Real-time interrupt

> Watchdog

Enhanced Capture Timer

> 8-channel, 16-bit with input capture, output compare and pulse accumulator

> 16-bit modulus down counter

8-bit or 16-bit Pulse-Wide Modulation (PWM)

> 8-channel, 8-bit or 4-channel, 16-bit PWM

> PWM supports center aligned operation

Two Serial Communications Interfaces

> 8192 prescaler option

Three Serial Peripheral Interfaces

> Up to 6.25 Mbps

Inter IC (I2C) Bus

> 256 clock rate options

Up to 91 Input/Output (I/O) Lines

> Programmable pull-ups/pull-downs

> Dual drive capability

Target Applications

> Automotive applications

> Industrial control