Freescale Semiconductor M68HC08, MC68HC908QT2 manual Freescale Semiconductor, Inc

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Freescale Semiconductor, Inc.

Freescale Semiconductor, Inc.

System Testing

15.Point the ASB520 board with LED D1 toward the DVD player and depress the REVERSE switch on the ASB520 PC board. The music will back-up, at a high rate, until it reaches the beginning of the song, at which time it will restart the song.

16.Point the ASB520 board with LED D1 toward the DVD player and depress the FORWARD switch on the ASB520 PC board. The music will play very fast.

17.Point the ASB520 board with LED D1 toward the DVD player and depress the PLAY switch on the ASB520 PC board. The music will resume at normal rate.

18.Power to the DVD player may now be turned off by depress the power switch on the left side of the DVD player.

This completes the hardware and software testing of the ASB520 infrared remote controller system.

The controller is ready for use with the APEX model 1201 DVD player.

DRM045

Using the ASB520 MC68HC908QT2 Based Infrared Remote Control Reference PC Board

 

 

 

28

System Testing

MOTOROLA

For More Information On This Product,

Go to: www.freescale.com

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Contents M68HC08 Freescale Semiconductor, IncFreescale Semiconductor, Inc Reference Design Revision History Table of Contents Table of Contents Introduction Introduction and SetupAbout this Manual Setup Guide MON08 connectorIntroduction and Setup Setup Guide Freescale Semiconductor, Inc Push Buttons Operational DescriptionLEDs JP1 JP2 JP3 Header and Jumpers Blocks Microcontroller Current Monitor Jumper Block 16-Pin Connector J1 Pin DescriptionPin Description Schematic and Parts List SchematicSemiconductor, Inc Parts List Reference PC Board Parts ListFreescale Semiconductor, Inc Grounding Design ConsiderationsInfrared and Visible LED Drive Circuit Switch Circuitry Design ConsiderationsSwitch Input A/D Values Freescale Semiconductor, Inc Hardware/Software Testing Summary System TestingFlash Programming System Testing LED and Push Button Test CodeDVD 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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