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wb0gaz
USA
5 Posts |
 Posted - 05/23/2026 : 17:22:02
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I have a need to use my GQ-4X4 to read-out and program EEPROM part number AT28HC64B-70JU which is permanently attached to an external PCB (but is not further attached to any other circuitry.) I have installed version 7.40 software and USB driver and the PC, GQ-4X4 and version 1.70 software are communicating normally. When I select the AT28HC64B-70JU the software advises that adapter ADP006 or ADP029 are required. The problem is that I cannot use an adapter as the device is not socketed on the test PCB, so I need to cross-connect the required subset of the 40 pin ZIF socket on the GQ-4X4 to the correct pins on the device on the test PCB. These connections would be exclusive (there is no other circuitry, just the AT28HC64B-70JU on a PC board with 32 holes expecting wires to the programmer's socket pins as reuqired.
How do I determine the required connections from the programmer so that I can manually jumper the (up to 32) pin connections from the GQ-4X4 to the AT28HC64B-70JU in lieu of the adapter/socket assembly the software indicates is needed? Are the pin connection used by the GQ-4X4 and version 1.40 for this device documented?
Thank you for any assistance.
Dave
wb0gaz@yahoo.com
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| Reply #1
wb0gaz
USA
5 Posts |
Posted - 05/23/2026 : 17:24:56
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| (software version typo (1.70 and 1.40 are typos) - using version 7.40 and windows 10 64-bit driver, freshly downloaded and installed.) |
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| Reply #2
anniel
2633 Posts |
Posted - 05/24/2026 : 07:22:49
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quote:
Originally posted by wb0gaz
I have a need to use my GQ-4X4 to read-out and program EEPROM part number AT28HC64B-70JU which is permanently attached to an external PCB (but is not further attached to any other circuitry.) I have installed version 7.40 software and USB driver and the PC, GQ-4X4 and version 1.70 software are communicating normally. When I select the AT28HC64B-70JU the software advises that adapter ADP006 or ADP029 are required. The problem is that I cannot use an adapter as the device is not socketed on the test PCB, so I need to cross-connect the required subset of the 40 pin ZIF socket on the GQ-4X4 to the correct pins on the device on the test PCB. These connections would be exclusive (there is no other circuitry, just the AT28HC64B-70JU on a PC board with 32 holes expecting wires to the programmer's socket pins as reuqired.
How do I determine the required connections from the programmer so that I can manually jumper the (up to 32) pin connections from the GQ-4X4 to the AT28HC64B-70JU in lieu of the adapter/socket assembly the software indicates is needed? Are the pin connection used by the GQ-4X4 and version 1.40 for this device documented?
Thank you for any assistance.
Dave
wb0gaz@yahoo.com
Use the datasheet. |
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| Reply #3
wb0gaz
USA
5 Posts |
Posted - 05/24/2026 : 08:52:02
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Thank you anniel -- this is my first experience with GQ-4X4 (I have owned since new 2015 but never used!)
---> Is it the case that Pin 1..32 of PLCC-32 package would use 32 pins of GQ-4X4 DIP40 socket aligned with bottom(pins 19,20) of DIP40 socket, Pins 1..4 of GQ-4X4 DIP40 socket not occupied, and Pins 37..40 of GQ-4X4 DIP40 socket not occupied, so that:
? Pin 1 of PLCC-32 package corresponds to Pin 5 of DIP40
? Pin 16 of PLCC32 corresponds to Pin 20 of DIP40
? Pin 17 of PLCC32 corresponds to Pin 21 of DIP40
? Pin 32 of PLCC32 corresponds to 36 of DIP40
Is there any exception to pin mapping of ADP006 or ADP029 to this simple mapping? As there is no documentation of ADP006 or ADP029, I am not certain if pin numbering follows exactly, or if there is some exception.
Thank you again anniel for your advice!
Dave
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GQ4x4 EEPROM AT28H64B-J70 (PLCC32) wired connect
