A Comprehensive Guide To MC9S12A128CPVE Microcontroller IC 16-Bit 25MHz 128KB (128K x 8) FLASH 112-LQFP (20x20)

HCS12 HCS12 Microcontroller IC 16-Bit 25MHz 128KB (128K x 8) FLASH 112-LQFP (20x20)

Overview 

Device Introduction

Freescale Semiconductor’s MC9S12A128 Flash microcontroller (MCU) is the next

generation of the highly successful 68HC12 architecture. Using Freescale’s

industry-leading 0.25 µs Flash, the A128 is part of a pin-compatible family that scales

from 32 KB to 512 KB of Flash memory. The MC9S12A128 provides an upward

migration path from Freescale’s 68HC08, 68HC11 and 68HC12 architectures for

applications that need larger memory, more peripherals and higher performance.

Device Features

High-Performance 16-bit HCS12 CPU Core

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

> Opcode compatible with the 68HC11 and 68HC12

> C-optimized architecture produces extremely compact code

On-Chip Debug Interface

> Dedicated serial debug interface

> On-chip breakpoints

> Real-time in-circuit emulation and debug without expensive and 

cumbersome box emulators

> Read/write memory and registers while running at full speed

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

> Two independently programmable Flash arrays

> Flexible block protection and security

> Flexibility to change code in the field

> Efficient end-of-line programming

> Total program time for 128 KB code is less than five seconds

> Reduces production programming cost through ultra-fast programming

> No external high voltage or charge pump required

> Virtual EEPROM implementation, Flash array usable for EE extension

> Can erase one array while executing code from another

2 KB Integrated EEPROM

> Flexible protection scheme for protection against accidental program or erase

> EEPROM can be programmed in 46 µs

> Can erase 4 bytes at a time and program 2 bytes at a time for calibration, security,

personality and diagnostic information

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

> Two, 8-channel ADCs

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

> Fast, easy conversion from analog inputs like position sensors, analog meters and

photovoltaic cells to digital values for CPU processing

> Can effectively have 3.5 µs conversion time by sampling same signal with both ADCs

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