Motorola M68HC08 Informations techniques télécharger pdf

AN2317/D

Rev. 1, 10/2002

Low-Cost Programming and

Debugging Options for

M68HC08 MCUs

Application Note

By: John Suchyta

Applications Engineering

8/16-Bit Products Division

Introduction

This application note describes several low-cost ways to get a target

M68HC908 microcontroller (MCU) into monitor mode for the purposes of

programming FLASH memory, reprogramming, and debugging. In most cases

an external connector is used to bring the necessary signals from a host

computer to the M68HC908 mounted on the target board. The size and type of

external connector can be tailored to the needs of the application.

Considerations for successful implementation of the monitor mode interface in

a production product are discussed. This application note applies to all

FLASH-based M68HC08 MCUs in general, and to the MC68HC908QY/QT

Family in two particular examples. Note that “FLASH-based M68HC08” and

“M68HC908” are synonymous in this document.

Commercial products, such as Motorola’s line of in-circuit simulator (ICS) kits

and the MON08-Cyclone and MON08-Multilink from P&E Microcomputer

Systems, are available to provide the external connector (typically called the

MON08 interface) and software to develop an application. These products are

recommended for many users, but low-cost alternatives are also available.

These alternatives can be used with several free or low-cost software

packages to develop and program an application.

Commercial products that gang program FLASH MCUs before they are

installed on a printed circuit board are not discussed here since the topic of this

document concerns in-circuit programming. However, commercial

programmers should be considered when the physical means to program in a

production environment are not available.

Freescale Semiconductor, I

For More Information On This Product,

Go to: www.freescale.com

Freescale Semiconductor

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Freescale Semiconductor, I 1

Résumé du contenu

Page 1 - Freescale Semiconductor, I

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AN2317/D10 Low-Cost Programming and Debugging Options for M68HC08 MCUsSimpler Monitor Mode CircuitA simpler implementation of the monitor mode circuit

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AN2317/DMON08 PodsLow-Cost Programming and Debugging Options for M68HC08 MCUs 11Oscillator Circuits Figure 6 shows two ways to supply the external osc

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AN2317/D12 Low-Cost Programming and Debugging Options for M68HC08 MCUsVTST Generation The MAX232 shown in Figure 4 and Figure 5 can be used to supply

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AN2317/DMON08 PodsLow-Cost Programming and Debugging Options for M68HC08 MCUs 13Figure 7. Low-Cost MON08 InterfaceP1162738495DB9NCNCNCVSSNCNCVSSVCCNCN

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AN2317/D14 Low-Cost Programming and Debugging Options for M68HC08 MCUsUser Monitor Mode Implementation The evaluation board shown in Figure 8 was buil

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AN2317/DMON08 Connections on a Target BoardLow-Cost Programming and Debugging Options for M68HC08 MCUs 15MON08 Connections on a Target BoardA target-p

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AN2317/D16 Low-Cost Programming and Debugging Options for M68HC08 MCUsHere are some suggestions on how to configure I/O pins for monitor mode entry:Hi

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AN2317/DMON08 Connections on a Target BoardLow-Cost Programming and Debugging Options for M68HC08 MCUs 17OSC/OSC1 The OSC signal is always applied to

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AN2317/D18 Low-Cost Programming and Debugging Options for M68HC08 MCUsLow-Cost MON08 SoftwareFree or low-cost software options for programming and deb

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AN2317/DLow-Cost MON08 SoftwareLow-Cost Programming and Debugging Options for M68HC08 MCUs 19PROG08SZ Programming the FLASH on an M68HC908 is relative

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AN2317/D2 Low-Cost Programming and Debugging Options for M68HC08 MCUsWhat is Monitor Mode?Monitor mode was developed as a feature of the M68HC08 MCU a

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AN2317/D20 Low-Cost Programming and Debugging Options for M68HC08 MCUsHere are the main steps in programming the FLASH with PROG08SZ in normal monitor

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AN2317/DLow-Cost MON08 SoftwareLow-Cost Programming and Debugging Options for M68HC08 MCUs 21Figure 12. P&E’s PROG08SZ Programmer Window Free

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AN2317/D22 Low-Cost Programming and Debugging Options for M68HC08 MCUsICD08SZ Getting into the ICD08SZ debugger is even simpler. With a MON08 interfac

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AN2317/DLow-Cost MON08 SoftwareLow-Cost Programming and Debugging Options for M68HC08 MCUs 23a great bargain for serious programmers. This powerful to

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AN2317/D24 Low-Cost Programming and Debugging Options for M68HC08 MCUs2. Click the + sign to expand the Sources folder.3. Modify the source file if ne

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AN2317/DLow-Cost MON08 SoftwareLow-Cost Programming and Debugging Options for M68HC08 MCUs 255. Select the PEDebug pulldown menu and navigate to the a

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AN2317/D26 Low-Cost Programming and Debugging Options for M68HC08 MCUsThe PROG08SZ Attempting to contact target and pass security… window appears. (Re

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AN2317/DConclusionLow-Cost Programming and Debugging Options for M68HC08 MCUs 27ConclusionSeveral aspects must be considered when implementing in-circ

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AN2317/DRev. 110/2002 Freescale Semiconductor, I Freescale Semiconductor, Inc.For More Information

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AN2317/DMonitor Mode SignalsLow-Cost Programming and Debugging Options for M68HC08 MCUs 3Monitor Mode SignalsThe physical monitor mode interface uses

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AN2317/D4 Low-Cost Programming and Debugging Options for M68HC08 MCUsMOD1, MOD0 The mode select pins must be at their prescribed levels if the VTST vo

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AN2317/DMON08 PodsLow-Cost Programming and Debugging Options for M68HC08 MCUs 5MON08 PodsThe hardware that connects a PC and the target board ranges f

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AN2317/D6 Low-Cost Programming and Debugging Options for M68HC08 MCUsThe MON08 connector pinout for one MCU may not match the pinout for another due t

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AN2317/DMON08 PodsLow-Cost Programming and Debugging Options for M68HC08 MCUs 7Figure 2. Cyclone Programmer (Class V) Window Showing MON08 PinoutMON08

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AN2317/D8 Low-Cost Programming and Debugging Options for M68HC08 MCUsCustom MON08 InterfacesAs mentioned above, monitor mode entry conditions can be i

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AN2317/DMON08 PodsLow-Cost Programming and Debugging Options for M68HC08 MCUs 9Figure 4. Normal Monitor Mode Circuit10 k10 k10 k10 kRSTIRQPTA0OSC11615