Products > Test Equipment
Sniffing the Rigol's internal I2C bus
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DoMaLo:
Hello everybody. I have MSO1104z, board version: 2.1.4, SV: 00.04.04.SP1. I took a dump using JLink Ultra + in JLink Commander and OpenOCD. Rigup 0.4.1 (MSO1000z) and 0.4.2 print "No keys" for both of dumps. What's can i do for unlocking my oscilloscope?
Gluk:
What do you think about resistors near 3k \$\Omega\$  near by FPGA and JTAG header in the  :-BROKE MSO1074z? May be is it  config divider?
DoMaLo:
I think that these are resistors for pull-up and pull-down JTAG chain. Because I was working with Actel FPGA and typical JTAG chain
ProASIC3E Flash Family for FlashPro has resistors. Circuit that I used for my project in attachment.
Gluk:
Friends, yes! resistors near JTAG header set the config. They has title "hardware version" and "sp version". Upper resistor line is pull-up, lower - is pull-down.

Do somebody want to play with this pull-up-down? $)
Gluk:

--- Quote --- the JTAG pullup/down resistors are there purely to enable robust JTAG data transfer.

--- End quote ---

This resistors not connected to the jtag pins!



It connected to the pins near JTAG. And it has title!
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