Hi Ismael,
The "Chip Version:" 66 returns the decimal equivalent of the Atmel firmware 
version which is the hex value "42".

Ronnie Thomas
Senior Software Development Engineer-TPM/Atmel Corporation
1150 E. Cheyenne Mountain Blvd, Colorado Springs, CO 80906
Tel:(+1)(719)-540-1604/Fax:(+1)(719)-540-1759
[email protected]/ http://www.atmel.com/

-----Original Message-----
From: Ismaël FEZZAZ [mailto:[email protected]] 
Sent: Thursday, September 24, 2015 8:35 AM
To: [email protected]
Subject: [TrouSerS-users] engraved chip version and tpm_version output differ

Hi,

I am working on an arm embeded system with an i2c wired tpm chip:
Linux v2r1 3.14.36ltsi-yocto-standard #12 Tue Sep 15 11:57:15 CEST
2015 armv7l GNU/Linux

The tpm_version output:
  TPM 1.2 Version Info:
  Chip Version:        1.2.66.4
  Spec Level:          2
  Errata Revision:     3
  TPM Vendor ID:       ATML
  TPM Version:         01010000
  Manufacturer Info:   41544d4c

But the version engraved on the chip is 1.2.42.4 The complet label on chip is  
SC323205T
 1528 A3BU7A
 1.2.42.04 U  PH

My question is why is there a difference between the two ?
Thanks.

--
Ismael

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