Hello.
I have a bricked device (huawei HG8247- erased uboot accidentaly), i have the uboot-file and i want to repair it with jtag.
He have an 2x5 pins jtag connector(smd type) like this "
http://wiki.openwrt.org/toh/huawei/hg553"
Configuration of device:
procesor - HISILICON SD5113
flash - SPANSION S29GL128N
I builded a cheap xilinx cable and tryed to connect with all the free jtag tools that i found (zjtag, tjtag, brjtag), without succes, since flash is in supported list seems to be problem with processor(not added to jtag tools), or pin assignment is wrong.
____________
1.TCK 2.GND |
3.TDO 4.VCC |
5.TMS 6.NC | THIS IS 2X5 PINS JTAG ASSIGNMENT THAT I FOUND ON INTERNET, and is like same to openwrt huawei
7.NC 8.NC |
9.TDI 10.GND |
_____________________________________________
1.??? - 1K ohms to gnd ??? | 2.GND - GND - OK |
3.??? - NO SIGNAL ??? | 4.VCC - 3,3V - OK |
5.??? - 3,3V ??? | 6.??? - NO SIGNAL - ??? | THIS IS WHAT I READ WITH VOLTMETTER ON DEVICE.
7.??? - 1K ohms to gnd ??? | 8.??? - NO SIGNAL - ??? |
9.??? - 3,3V ??? |10.GND - GND - OK |
thanks.
here have a picture of pcb
http://img547.imageshack.us/img547/3281/ont.jpg