Freescale Semiconductor MC68HC908QT2, M68HC08 System Testing, Hardware/Software Testing Summary

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Freescale Semiconductor, Inc.

Freescale Semiconductor, Inc.

Designer Reference Manual — DRM045

Section 6. System Testing

6.1 Introduction

This section will first explain how to program the control program into FLASH memory of the MC68HC908QT2 microcontroller. It will then, in detail, provide functional testing of both hardware and user software for the ASB520 infrared remote control reference design.

6.2 Hardware/Software Testing Summary

Because the PC board has minimal user interface, hardware testing will be performed in stages.

•First the control program will be programmed into the MC68HC908QT2’s FLASH memory.

•The keyboard and red LED will be tested next.

•Finally, the ASB520 PC board will be used to control a DVD.

6.3FLASH Programming

The following steps are used to initially program the MC68HC908QT2:

1.If installed, remove the batteries from the battery holder located on the bottom of the PC board

2.Remove jumpers JP1–JP4.

3.Connect the P&E Microcomputer Systems, Inc. MON08 Cyclone’s ribbon cable from the programmer to J1, noting the location of pin 1 on J1.

Follow the P&E Microcomputer Systems, Inc. instructions to program the MC68HC908QT2, with the remote control program file. The file name to program into the device is ASB520.S19.

After FLASH programming is complete, disconnect the Cyclone’s ribbon cable connected to J1 of the ASB520 PC board.

In a production environment, the Cyclone Programmer can be setup so that a single press of a button will initiate an automatic programming operation. The Application Program would be pre-loaded into nonvolatile memory in the Cyclone and no PC would need to be present during production programming.

Using the ASB520 MC68HC908QT2 Based Infrared Remote Control Reference PC Board

DRM045

 

 

 

MOTOROLA

System Testing

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For More Information On This Product,

 

 

Go to: www.freescale.com

 

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Contents Freescale Semiconductor, Inc M68HC08Freescale Semiconductor, Inc Reference Design Revision History Table of Contents Table of Contents Introduction Introduction and SetupAbout this Manual MON08 connector Setup GuideIntroduction and Setup Setup Guide Freescale Semiconductor, Inc Push Buttons Operational DescriptionLEDs JP1 JP2 JP3 Header and Jumpers Blocks Microcontroller Current Monitor Jumper Block Pin Description 16-Pin Connector J1Pin Description Schematic Schematic and Parts ListSemiconductor, Inc Reference PC Board Parts List Parts ListFreescale Semiconductor, Inc Grounding Design ConsiderationsInfrared and Visible LED Drive Circuit Design Considerations Switch CircuitrySwitch Input A/D Values Freescale Semiconductor, Inc Hardware/Software Testing Summary System TestingFlash Programming LED and Push Button Test Code System TestingDVD Player Control Test Freescale Semiconductor, Inc Freescale Semiconductor, Inc HOW to Reach US
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MC68HC908QT2, M68HC08 specifications

Freescale Semiconductor, known for its innovative solutions in the field of embedded systems, developed the M68HC08 microcontroller family, which includes the MC68HC908QT2. This 8-bit microcontroller is engineered to meet the demands of diverse applications, including automotive, industrial, and consumer electronics.

The MC68HC908QT2 is designed around Freescale’s M68HC08 core, which is renowned for its efficient and reliable performance. This microcontroller integrates a powerful instruction set, enabling developers to create high-performance applications with relatively low power consumption. The device operates at a clock frequency of up to 3 MHz, which is adequate for various control tasks.

One of the key features of the MC68HC908QT2 is its memory architecture. It includes a 2 KB Flash memory for program storage, representing a significant advantage for developers requiring non-volatile memory. Additionally, it encompasses 128 bytes of EEPROM memory, allowing for data retention even after power loss. The microcontroller also has 256 bytes of RAM for efficient data manipulation during operation.

In terms of input/output capabilities, the MC68HC908QT2 supports a variety of interfacing options. The microcontroller features up to 20 general-purpose I/O pins for flexibility in connecting with peripheral devices. Additionally, it provides multiple analog-to-digital converters (ADC) and timers that facilitate efficient analog signal processing and precise control through timing functions.

The architecture of the MC68HC908QT2 also incorporates sophisticated on-chip peripherals, enhancing its functionality. These peripherals include PWM (Pulse Width Modulation) outputs, which are essential for applications requiring motor control and other precise duty cycle processes. The integrated watchdog timer ensures reliable operation by resetting the system in the event of an application failure.

Moreover, the MC68HC908QT2 is equipped with an efficient power management system, enabling operation in a low-power mode, ideal for battery-powered applications. This microcontroller is packaged in a compact 28-pin dual in-line package (DIP), making it suitable for space-constrained designs.

In summary, the Freescale Semiconductor MC68HC908QT2 microcontroller is distinguished by its robust performance, extensive memory options, and versatile I/O capabilities. Its advanced features, including built-in timers, ADC, and a power management system, make it an exceptional choice for developers seeking to implement reliable and efficient embedded solutions. With its comprehensive architecture, the MC68HC908QT2 remains a popular choice in the landscape of 8-bit microcontrollers.
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