AnsweredAssumed Answered

87 00 response from CR95HF reader most of the times

Question asked by srinath.uma.001 on Nov 18, 2015
Latest reply on Nov 18, 2015 by NFC IC support2
I have to integrate NFC into STM32 series controller.
I am able to successfully detect the tag by sending following commands.

After successful completion of Select2 process.I send PWD_AUTH commnd as my tag is read and write protected.

I get response as 87 00(Frame wait time or no Tag)

But my PWD_AUTH command internally it is success and i can get access to read and write into the tag.PWD given is accurate and correct in ascii values.

Can you let me know why instead of PACK response i get 87 00


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0x02 0x02 0x00 0x00 PCD Field OFF
0x09 0x04 0x68 0x01 0x07 0x00Reset RF
0x09 0x04 0x68 0x01 0x07 0x10 Set RF
0x02 0x07 0x02 0x00 0x00 0x00 0x00 0x02 0x02 Protocol Select
0x09 0x04 0x3A 0x00 0x58 0x04PCD WR REG Gain:0x58
0x09 0x04 0x68 0x01 0x01 0xD3PCD WR REG Gain:0xD3
0x04 0x02 0x26 0x07 REQA
0x04 0x03 0x93 0x20 0x08 AntiCol1
0x04 0x08 0x93 0x70 0x88 0x04 0xBF 0x66 0x55 0x28 Select1
0x04 0x03 0x95 0x20 0x08AntiCol2
0x04 0x03 0x95 0x20 0x08 0x04 0x08 0x95 0x70 0x88 0x04 0x0E 0x90 0x77  0x28Select2
0x04 0x06 0x1B 0x52 0x6F 0x61 0x64 0x28 PWD_AUTH
UID: 0x04 0xBF 0x66  0x04 0x0E 0x90 0x77 

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