MQP's Programming solutions for Hitachi Microprocessors

MQP Electronics manufacture a complete range of equipment for programming Hitachi Microprocessors, for both development and production. We are suppliers of adapters to Hitachi, and can give you early support for new device types. This document is found on our Web Site and is regularly updated, so please check there if the information you need is not included.

The following tables summarise the requirements of adapters and programmers for available Hitachi Microprocessors. Where the adapter number starts with AD... it is manufactured by MQP and usually available ex stock.

H8/500

H8/300L

H8/300

H8/300H

SH

The tables above are based on information supplied to us by Hitachi. Please check order codes are for correct item before ordering.

* Please contact us for this information.

EPROM Type

This is the device type that the programming algorithm most closely resembles. It is however not an exact equivalent. There are several reasons why an algorithm for the 'equivalent' EPROM (or FLASH) device may not program the microprocessor part correctly.

• The EPROM (or FLASH) part has a Silicon Signature (ID), accessed by applying 12V to address A9. If 12V is applied to the equivalent pin on the microprocessor is is likely that damage will result. The usual precaution against this possibility is to make sure that ID checking function is disabled before attempting any function (Reading, Programming, Blank Checking or Checksumming) on the microprocessor.
• The programmable address space of the microprocessor may be less than the address space of the equivalent EPROM or FLASH device. If this is so then Blank Check, Verify, Programming or Checksumming functions may well fail because non-existant memory is accessed. It will be necessary to use a programmer which either specifically allows the microcontroller in question to be chosen or which allows the address range to be adjusted to suit the microprocessor.
• The VCC current will be different from the equivalent EPROM or FLASH device. Some programmers will reject the microprocessor for this reason.
• Many microcontroller adapters include oscillator circuitry to supply the microprocessor clock. The programmer will have to make allowances for the extra time required after power up before attempting to access the microprocessor. Similarly many adapters have requirements for the power on reset circuitry to have time to operate, and the time delay involved is often surprisingly long.

MQP also manufactures a comprehensive range of device programmers. If you have any difficulty using existing equipment which may not take into account the differences mentioned above, please contact us for a single site or a gang solution. Our sales office will be pleased to advise.