A small trick to program SPI flash on board.

Video on youtube.

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usbbdm
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Joined: Mon Jul 18, 2005 9:33 pm

A small trick to program SPI flash on board.

Post by usbbdm »


I remember older days people trying to raise the voltage to get flash detected. What I found during programming HT802 is the other way around. I need to lower the voltage to give SPI enough power but not enough for the CPU to be operational.
I explained why in latter video.
I will create a separate video unlocking Vonage HT802 voip box.
Boxnut
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Re: A small trick to program SPI flash on board.

Post by Boxnut »

There are a few old tricks that work, my choice is if JTAG, the 0rocessor is already initialized with very efficient SPI reading and writing to EPROM or e2prom.
Someone posted a means of bypassing the CPU and tapping the 4 wire directly, that can be made to work.
Some of my information may be incorrect, incomplete,or just plain wrong. Seems I am human. :D
usbbdm
Junior Member
Posts: 8962
Joined: Mon Jul 18, 2005 9:33 pm

Step by step to unlock Vonage HT802.

Post by usbbdm »

Phican
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Posts: 1
Joined: Tue Jul 11, 2023 9:13 am

Re: A small trick to program SPI flash on board.

Post by Phican »

Where can I find the link below?
https://www.usbjtag.com/jtagnt/voip/HT802.zip

Also, any details on the breakout board and the pinout used for the clip? Where can one buy the clip?
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