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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 byt)es 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.

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

– Digital filtering

– Programmable rising or falling edge trigger

? Memory

– 128K Flash EEPROM

– 2K byte EEPROM

– 8K byte RAM

? Two 8-channel Analog-to-Digital Converters

– 10-bit resolution

– External conversion trigger capability

? Three 1M bit per second, CAN 2.0 A, B software compatible modules

– Five receive and three transmit buffers

– Flexible identifier filter programmable as 2 x 32 bit, 4 x 16 bit or 8x8bit

– Four separate interrupt channels for Rx, Tx, error and wake-up

– Low-pass filter wake-up function

– Loop-back for self test operation

? Enhanced Capture Timer

– 16-bit main counter with 7-bit prescaler

– 8 programmable input capture or output compare channels

– Four 8-bit or two 16-bit pulse accumulators

? 8 PWM channels

– Programmable period and duty cycle

– 8-bit 8-channel or 16-bit 4-channel

– Separate control for each pulse width and duty cycle

– Center-aligned or left-aligned outputs

– Programmable clock select logic with a wide range of frequencies

– Fast emergency shutdown input

– Usable as interrupt inputs

? Serial interfaces

– Two asynchronous Serial Communications Interfaces (SCI)

– Two Synchronous Serial Peripheral Interface (SPI)

– Byteflight

? Byte Data Link Controller (BDLC)

? SAE J1850 Class B Data Communications Network Interface

– Compatible and ISO Compatible for Low-Speed (<125 Kbps) Serial Data Communications in

Automotive Applications

? Inter-IC Bus (IIC)

– Compatible with I2C Bus standard

– Multi-master operation

– Software programmable for one of 256 different serial clock frequencies

? 112-Pin LQFP and 80-Pin QFP package options

– I/O lines with 5V input and drive capability

– 5V A/D converter inputs

– Operation at 50MHz equivalent to 25MHz Bus Speed

– Development support

– Single-wire background debug? mode

– On-chip hardware breakpoints