cm500 Modem USBJtag Pinout

stolichnaya · Post by **stolichnaya** » Wed Apr 27, 2016 12:20 pm

I was wondering is it possible to USBjtag the soic chip on cm500?

I'm waiting on on new programmer mines fried just kinda. Bored any help appreciated. Pinouts? Thanks..

Flash chip is located on the bottom and is a Winbond-W25Q64FV

(http://www.winbond-usa.com/resource-fil ... 100713.pdf

Post by **usbbdm** » Wed Apr 27, 2016 2:36 pm

This is SPI flash, you can use SPI programming. If there is JTAG port then we need to know the CPU and see if it is possible to add support to it.

stolichnaya · Post by **stolichnaya** » Wed Apr 27, 2016 9:30 pm

MemSize: 128 M
Chip ID: BCM3843D-B0

BootLoader Version: 2.5.0alpha8 Release spiboot dual-flash avs
Build Date: Apr 25 2014
Build Time: 13:00:50
SPI flash ID 0xef4017, size 8MB, block size 64KB, write buffer 256, flags 0x1
Cust key size 128

I attached a serial and went into bootloader options. Its a noisy bootloader as far as me being able to load what bank i want to choose or running tftp and booting images. But once image is loaded i lose access. Anyone happen to have or know of the noisy bootloader for modem I know this exists..

Here are the SERIAL logs from Putty.
http://pastebin.com/eKdKwj3a

Pictures of Front and Back of modem

ictvtec · Post by **ictvtec** » Tue Aug 30, 2016 9:48 am

nothing on this modem?

demonspride · Post by **demonspride** » Tue Aug 30, 2016 5:46 pm

I had an unlocked bootloader, with an unshadowed nonvol fw, but it was posted at SBh, which is gone, and unfortunately, I lost all my backups to a hdd failure... only think i can suggest is try to crash the modem by shorting tdi to gnd while the fw image loads.

ictvtec · Post by **ictvtec** » Tue Aug 30, 2016 5:53 pm

Well that just sux...

abescalamis · Post by **abescalamis** » Mon Mar 27, 2017 12:05 pm

demonspride wrote:I had an unlocked bootloader, with an unshadowed nonvol fw, but it was posted at SBh, which is gone, and unfortunately, I lost all my backups to a hdd failure... only think i can suggest is try to crash the modem by shorting tdi to gnd while the fw image loads.

You should contact dw5304, if I'm not mistaken he was the first one to flash that modem and made it like a SB6183, he knows how.

CAPONE · Post by **CAPONE** » Sat Apr 01, 2017 11:34 am

stolichnaya wrote:I was wondering is it possible to USBjtag the soic chip on cm500?

I'm waiting on on new programmer mines fried just kinda. Bored any help appreciated. Pinouts? Thanks..

Flash chip is located on the bottom and is a Winbond-W25Q64FV

(http://www.winbond-usa.com/resource-fil ... 100713.pdf

The ISP for this Modem will be to the front of the board.

deestee · Post by **deestee** » Sun Apr 02, 2017 1:28 pm

CAPONE wrote:The ISP for this Modem will be to the front of the board.

would you mind pointing t out, I had tried quite hard to find it..

CAPONE · Post by **CAPONE** » Sat Apr 08, 2017 6:09 pm

deestee wrote:would you mind pointing t out, I had tried quite hard to find it..

Sent E-Mail.
Picture has Instructions.

USB JTAG

cm500 Modem USBJtag Pinout

cm500 Modem USBJtag Pinout

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