Introduction

The MC9S12E128 is a 112/80/64 pin low cost general purpose MCU comprised of standard on-chip peripherals including a 16-bit central processing unit (HCS12 CPU), up to 128K bytes of Flash EEPROM, up to 8K bytes of RAM, three asynchronous serial communications interface modules (SCI), a serial peripheral interface (SPI), an Inter-IC Bus (IIC), three 4-channel 16-bit timer modules (TIM), a 6-channel 15-bit Pulse Modulator with Fault protection module (PMF), a 6-channel 8-bit Pulse Width Modulator (PWM), a 16-channel 10-bit analog-to-digital converter (ADC), and two 1-channel 8-bit digital-to-analog converters (DAC). The MC9S12E128 has full 16-bit data paths throughout. 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 on each module, 16 dedicated I/O port bits are available with Wake-Up capability from STOP or WAIT mode. Furthermore, an on chip bandgap based voltage regulator (VREG) generates

the internal digital supply voltage of 2.5V (VDD) from a 3.135V to 5.5V external supply range.

Features

? 16-bit HCS12 CORE

— HCS12 CPU

– i. Upward compatible with M68HC11 instruction set

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

– iii. Instruction queue

– iv. Enhanced indexed addressing

— Module Mapping Control (MMC)

— Interrupt control (INT)

— Background Debug Module (BDM)

— Debugger (DBG12) including breakpoints and change-of-flow trace buffer

— Multiplexed External Bus Interface (MEBI)

? Wake-Up interrupt inputs

— Up to 16 port bits available for wake up interrupt function with digital filtering

? Memory Options

— 32K, 64K or 128K Byte Flash EEPROM

— 2K, 4K or 8K Byte RAM

? Two 1-channel Digital-to-Analog Converters (DAC)

— 8-bit resolution

? Analog-to-Digital Converter (ADC)

— 16-channel module with 10-bit resolution

— External conversion trigger capability

? Three 4-channel Timers (TIM)

— Programmable input capture or output compare channels

— Simple PWM mode

— Counter modulo reset

— External event counting

— Gated time accumulation

? 6 PWM channels (PWM)

— Programmable period and duty cycle

— 8-bit 6-channel or 16-bit 3-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

? 6-channel Pulse width Modulator with Fault protection (PMF)

— Three independent 15-bit counters with synchronous mode

— Complementary channel operation

— Edge and center aligned PWM signals

— Programmable dead time insertion

— Integral reload rates from 1 to 16

— Four fault protection shut down input pins

— Three current sense input pins

? Serial interfaces

— Three asynchronous serial communication interfaces (SCI)

— Synchronous serial peripheral interface (SPI)

— Inter-IC Bus (IIC)

? Clock and Reset Generator (CRG)

— Windowed COP watchdog

— Real Time interrupt

— Clock Monitor

— Pierce or low current Colpitts oscillator

— Phase-locked loop clock frequency multiplier

— Self Clock mode in absence of external clock

— Low power 0.5 to 16Mhz crystal oscillator reference clock

? Operating frequency

— 50MHz equivalent to 25MHz Bus Speed

? Internal 2.5V Regulator

— Input voltage range from 3.135V to 5.5V

— Low power mode capability

— Includes low voltage reset (LVR) circuitry

— Includes low voltage interrupt (LVI) circuitry

? 112-Pin LQFP or 80-Pin QFP or 64-Pin QFN package

— Up to 90 I/O lines with 5V input and drive capability (112 pin package)

— Up to two dedicated 5V input only lines (IRQ and XIRQ)

— Sixteen 3.3V/5V A/D converter inputs

? Development Support.

— Single-wire background debugTM mode

— On-chip hardware breakpoints

— Enhanced debug features