August 7th, 2021, 12:47
August 7th, 2021, 15:59
0x45DE949376 = 0b0100010111011110100101001001001101110110
0x45DC949174 = 0b0100010111011100100101001001000101110100
x x x
7654321076543210765432107654321076543210
August 7th, 2021, 17:13
August 7th, 2021, 23:40
fzabkar wrote:
- Code:
0x45DE949376 = 0b0100010111011110100101001001001101110110
0x45DC949174 = 0b0100010111011100100101001001000101110100
x x x
7654321076543210765432107654321076543210
August 7th, 2021, 23:59
Amarbir[CDR-Labs] wrote:fzabkar wrote:
- Code:
0x45DE949376 = 0b0100010111011110100101001001001101110110
0x45DC949174 = 0b0100010111011100100101001001000101110100
x x x
7654321076543210765432107654321076543210
Hi,
what i was asking is that can someone check in adapter which solder pad of socket defines DE or DC ,This can help me trace a bad soldering joint and trace the issue , i also wanted to tell you that i am reading the same very chip in PC3K Flash and ECCing and Rereading So that i can use in VNR ,This is really sad state of affairs :(
August 8th, 2021, 1:10
fzabkar wrote:Amarbir[CDR-Labs] wrote:fzabkar wrote:
- Code:
0x45DE949376 = 0b0100010111011110100101001001001101110110
0x45DC949174 = 0b0100010111011100100101001001000101110100
x x x
7654321076543210765432107654321076543210
Hi,
what i was asking is that can someone check in adapter which solder pad of socket defines DE or DC ,This can help me trace a bad soldering joint and trace the issue , i also wanted to tell you that i am reading the same very chip in PC3K Flash and ECCing and Rereading So that i can use in VNR ,This is really sad state of affairs
You are asking the wrong question. Obviously data bit #1 is stuck low.
August 8th, 2021, 3:41
August 8th, 2021, 6:13
fzabkar wrote:Download the ONFI NAND spec and obtain the pinout for TSOP-48 and BGA-132 NANDs. Then locate the pin and ball that connect to DQ1. Test for continuity between the pin and ball.
http://www.onfi.org/-/media/client/onfi/specs/onfi_4_1_gold.pdf?la=en
August 8th, 2021, 7:24
August 8th, 2021, 7:40
Arch Stanton wrote:Check adapter under microscope, maybe some obvious issue you can spot, pin bent or something.
August 8th, 2021, 7:47
August 8th, 2021, 9:06
Arch Stanton wrote:Flash Extractor is what I'm using.
Still learning and experimenting though. Translation: half the time having no f*cking idea about what I am doing.
August 8th, 2021, 9:31
fzabkar wrote:Download the ONFI NAND spec and obtain the pinout for TSOP-48 and BGA-132 NANDs. Then locate the pin and ball that connect to DQ1. Test for continuity between the pin and ball.
http://www.onfi.org/-/media/client/onfi/specs/onfi_4_1_gold.pdf?la=en
August 11th, 2021, 16:31
0x45DE949376 = 0b0100010111011110100101001001001101110110 expected data (hexadecimal/binary)
0x45DC949174 = 0b0100010111011100100101001001000101110100 actual bad data (hexadecimal/binary)
x x x bit differences
7654321076543210765432107654321076543210 bit numbers (0 - 7)
August 12th, 2021, 3:02
fzabkar wrote:Maybe I should have made it a little more obvious ...
- Code:
0x45DE949376 = 0b0100010111011110100101001001001101110110 expected data (hexadecimal/binary)
0x45DC949174 = 0b0100010111011100100101001001000101110100 actual bad data (hexadecimal/binary)
x x x bit differences
7654321076543210765432107654321076543210 bit numbers (0 - 7)
August 12th, 2021, 3:28
PC3K's adapter can be a real pain to align - I can't imagine VNR's is any easier. Silly question but if your VNR read is ok, and the chips read in PC3K is ok when not just return the adapter to Rusolut for a replacement or grab an off brand adapter.Amarbir[CDR-Labs] wrote:The same BGA132 even if perfectly aligned does not read in BGA152 adapter also funy ,works perfecto in Acelab BGA-152 adapter .
August 12th, 2021, 6:24
Lardman wrote:PC3K's adapter can be a real pain to align - I can't imagine VNR's is any easier. Silly question but if your VNR read is ok, and the chips read in PC3K is ok when not just return the adapter to Rusolut for a replacement or grab an off brand adapter.Amarbir[CDR-Labs] wrote:The same BGA132 even if perfectly aligned does not read in BGA152 adapter also funy ,works perfecto in Acelab BGA-152 adapter .
I can't see an image online of a zif adapter but could you just drop some fly leads on and scope of the output of the relevant pad and connector pin?
August 12th, 2021, 11:35
August 12th, 2021, 15:33
August 12th, 2021, 15:43
fzabkar wrote:AIUI, Rusolut's VNR hardware has a DIP-48 connection to the external world. I assume that the pinout would match match an ONFI standard TSOP-48 pinout. In any case you could take the TSOP-48 adapter that is supplied in the starter kit and perform a continuity test of all 48 pins.
Then I would locate the DQ1 pin and test for continuity with the BGA-132/152 DQ1 ball(s). Do the same for DQ0 and DQ2-7.
If the VNR hardware is a quality product, then it will have a self-test function. One of these tests should check the status of each pin when fed from a voltage source. This would normally be implemented with a loopback adapter or a similar test jig.
If the unit doesn't have a self test, then measure each DQ pin with a multimeter. Measure its voltage, and then test its resistance to ground (with the unit powered down, of course). Use a scope to watch the activity on DQn when reading a flash device.
Troubleshooting a stuck bit is not rocket science.
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