when emmc soldered to board - no riffbox connection

[emdzej91]

Hi there,
Its not a mobile phone but still emmc (board from Magellan 9800i),
KLM2G1DEHE-B101 connected to am3703cus,

Direct connection to chip via adapter - works,

Open serial port...OK
Connecting to the RIFF Box...OK
Firmware Version: 1.41 (RIFFBOX1), JTAG Manager Version: 1.62

Connecting to the SD/eMMC Card...OK
Set I/O Voltage reads as 3.30V, SD_CLK Frequency is 2.50 MHz

Memory Type .......................... eMMC
Manufacturer ID ...................... 0x15
OEM/Application ID ................... 0x00
Product Name ......................... "M2G1DE"
Package .............................. BGA
User Area Partition Size ............. 0x000077400000 Bytes (1.86 GB)
OCR Register ......................... 0x80FF8080 (Dual Voltage)
Write Protection Bits ................ NONE
Chip Revision ........................ 1.2
Multimedia Card Revision ............. 1.3 (eMMC v4.3)
Serial Number ........................ 0x335D2EAC
Memory Manufacturing Date ............ 2012

When the same IC is soldered on board (this board was tested 2 moths ago and it have worked, now - no more, why?) - no connection

Open serial port...OK
Connecting to the RIFF Box...OK
Firmware Version: 1.41 (RIFFBOX1), JTAG Manager Version: 1.62

Connecting to the SD/eMMC Card...ERROR
Set I/O Voltage reads as 3.30V, SD_CLK Frequency is 2.50 MHz

Connecting to the SD/eMMC Card Failed (ERR[0071], POS[0001])

New emmc chip:
Direct connection via adapter - ok,
When IC soldiered on board - no connection

Pinout - ok, checked with working boards,
Soldering - ok,

I have tested that with few chips and boards, always the same...

[Legija]

Try disconnecting CLK line between board MCU and eMMC.

[emdzej91]

Doesn't work, i tried with dat0 and cmd too

[anda utama]

try resistor clk disconect....
work for me..

[emdzej91]

I think that MCU is problem - GPMC: General Purpose Memory Controller, NAND/NOR Flash, SRAM is dead because when i have desoldered MCU i made connection with emmc.
I have the MCU reballed und soldered again - no connection with emmc.
Link

[gabiz_ro]

Didn't say anything about voltages.
Are still present when MCU soldered?

You may use oscilloscope on CLK,DAT0 and CMD without CPU and after with CPU and see what is wrong when CPU soldered.

[mfp123]

Got the same problems with riff box and when its soldiered in Board.no Connection anyway. Soldering is good because i See the emmc With other Boxes. Would like go use riff box - Any help? Thanks

[nicolayer]

Got the same problems with riff box and when its soldiered in Board.no Connection anyway. Soldering is good because i See the emmc With other Boxes. Would like go use riff box - Any help? Thanks

So, put here isp pinout for test and log from other tool