46

MC68HC908MR32 • MC68HC908MR16 Data Sheet, Rev. 6.1

 

 

M68HC08 CPU

 

 

 

 

 

 

 

CPU

 

 

ARITHMETIC/LOGIC

 

 

REGISTERS

 

 

UNIT

 

 

 

 

 

 

 

 

 

 

 

 

 

CONTROL AND STATUS REGISTERS — 112 BYTES

USER FLASH — 32,256 BYTES

USER RAM — 768 BYTES

MONITOR ROM — 240 BYTES

USER FLASH VECTOR SPACE — 46 BYTES

OSC1

 

 

 

CLOCK GENERATOR

 

 

 

OSC2

 

 

 

 

 

 

MODULE

CGMXFC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SYSTEM INTEGRATION

 

RST

 

 

 

 

 

 

 

MODULE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

IRQ

 

 

IRQ

 

 

 

 

 

 

 

 

 

 

MODULE

 

 

 

 

VDDA

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(3)

 

 

 

 

 

 

 

VSSA

 

 

 

 

ANALOG-TO-DIGITAL CONVERTER

(3)

 

 

 

 

MODULE

VREFL

 

 

 

 

VREFH

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

INTERNAL BUS

 

DDRA

PTA

PTA7–PTA0

LOW-VOLTAGE INHIBIT

 

 

 

 

MODULE

 

 

PTB7/ATD7

 

 

 

 

 

 

PTB6/ATD6

COMPUTER OPERATING PROPERLY

 

 

PTB5/ATD5

DDRB

 

PTB4/ATD4

MODULE

PTB

 

PTB3/ATD3

 

 

 

PTB2/ATD2

TIMER INTERFACE

 

 

PTB1/ATD1

MODULE A

 

 

PTB0/ATD0

 

 

 

 

 

 

PTC6

TIMER INTERFACE

 

 

PTC5

 

 

 

MODULE B

DDRC

 

PTC4

 

PTC

PTC3

 

PTC2

SERIAL COMMUNICATIONS INTERFACE

 

 

 

 

PTC1/ATD9(1)

MODULE

 

 

PTC0/ATD8

 

 

 

 

 

 

PTD6/IS3

SERIAL PERIPHERAL INTERFACE

 

 

PTD5/IS2

MODULE(2)

 

PTD

PTD4/IS1

 

 

 

 

PTD3/FAULT4

 

 

PTD2/FAULT3

POWER-ON RESET

 

 

 

 

PTD1/FAULT2

MODULE

 

 

 

 

 

PTD0/FAULT1

SINGLE BREAK

 

 

PTE7/TCH3A

 

 

PTE6/TCH2A

MODULE

 

 

 

 

PTE5/TCH1A

 

 

 

 

DDRE

PTE

PTE4/TCH0A

PTF5/TxD

PTE3/TCLKA

PTE2/TCH1B(1)

 

 

PTF4/RxD

 

 

(1)

Analog-to-Digital Converter (ADC)

Freescale Semiconductor

PWMGND PWM6–PWM1

VSS

VDD

VDDAD

VSSAD

PULSE-WIDTH MODULATOR

MODULE

POWER

PTF3/MISO(1)

 

 

 

 

 

 

 

 

 

 

 

 

 

PTE1/TCH0B

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PTE0/TCLKB(1)

PTF2/MOSI(1)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(1)

 

 

PTF

DDRF

 

 

 

 

 

PTF1/SS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PTF0/SPSCK(1)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Notes:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1.These pins are not available in the 56-pin SDIP package.

2.This module is not available in the 56-pin SDIP package.

3.In the 56-pin SDIP package, these pins are bonded together.

Figure 3-1. Block Diagram Highlighting ADC Block and Pins

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Page 46
Image 46
Freescale Semiconductor MC68HC908MR32 manual Block Diagram Highlighting ADC Block and Pins, Analog-to-Digital Converter ADC
Page 45 Page 47

MC68HC908MR16, MC68HC908MR32 specifications

Freescale Semiconductor's MC68HC908MR32 and MC68HC908MR16 microcontrollers are part of the popular HC08 family, designed primarily for embedded applications. These microcontrollers are particularly favored in automotive, industrial, and consumer product sectors due to their reliability and versatility.

One of the standout features of the MC68HC908MR series is its CMOS technology, which enhances performance while minimizing power consumption. This makes these microcontrollers suitable for battery-operated devices. They operate at a maximum clock frequency of 2 MHz and offer a 16-bit architecture, providing a solid balance between processing power and efficiency.

The MC68HC908MR32 variant is equipped with 32KB of flash memory, which allows for the storage of complex programs and extensive data handling. In contrast, the MC68HC908MR16 features 16KB of flash memory, making it ideal for simpler applications. Both microcontrollers also come with 1KB of RAM, enabling efficient data processing and real-time operations.

Another significant characteristic of these microcontrollers is their integrated peripherals. They come with multiple input/output (I/O) pins, which allow for connectivity with various sensors and actuators. The built-in timer systems offer precise timing control for automotive and industrial applications, while the Analog-to-Digital Converter (ADC) provides essential conversion capabilities for various analog signals.

For communication purposes, the MC68HC908MR series includes a serial communication interface, enabling easy integration with other devices and systems. This versatility facilitates the development of complex systems that require interaction with external components.

Security is another crucial aspect of these microcontrollers. They have built-in fail-safe mechanisms to ensure reliable operation under various conditions, making them suitable for critical systems. Additionally, their robust architecture helps to safeguard against potential disruptions or attacks.

In summary, Freescale Semiconductor's MC68HC908MR32 and MC68HC908MR16 microcontrollers are key players in the embedded systems landscape. Their blend of power efficiency, integrated features, and scalability ensures they remain relevant for a wide array of applications, making them a favored choice among engineers and developers looking for dependable solutions in a competitive market.
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