[FAQ] AM6548: CTRLMMR_WKUP_JTAGID register value for SR2.1

Daisuke Maeda

Guru 20345 points

Part Number: AM6548

Section "1.6 Device Identification" in the TRM describes the CTRLMMR_WKUP_JTAGID register values for SR1.0 and SR2.0, but not for SR2.1.

What is the CTRLMMR_WKUP_JTAGID register value for SR2.1? Is it the same as SR2.0?

Best regards,

Daisuke

over 4 years ago

+1 jian35385 over 4 years ago

TI__Mastermind 23125 points

Daisuke,

The JTAGID is the same between SR2 and SR2.1.

Let me know if you need specific software that you like to discriminate between the two silicon revisions.

regards

Jian

0 Daisuke Maeda over 4 years ago in reply to jian35385

Guru 20345 points

Hi Jian-san,

Thank you for your reply.

Could you tell me how to discriminate the two silicon revisions by software, e.g. Linux?

Best regards,

Daisuke

+1 jian35385 over 4 years ago in reply to Daisuke Maeda

TI__Mastermind 23125 points

Daisuke,

JTAG ID was not updated from PG2.0 to PG2.1 to allow software compatibility.

However, you may use DIE_ID3 register (not documented in the TRM currently):

Main MMR module:
Register Name: Silicon Revision (internally called DIE_ID3)
Address: 0x4300002C
Bit fields: 5-bit LSB, rest reserved.
Definition:
[4:0]=0x1, design Revision B, Silicon Revision 1.0
[4:0]=0x2, design Revision B, Silicon Revision 2.0
[4:0]=0x3, design Revision C, Silicon Revision 2.1

regards
Jian

0 Daisuke Maeda over 4 years ago in reply to jian35385

Guru 20345 points

Hi Jian-san,

Thank you for your reply.

Our customer was able to verify that the AM6548 on their custom board was SR2.1 by checking the DIE_ID3 register.

Best regards,

Daisuke

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[FAQ] AM6548: CTRLMMR_WKUP_JTAGID register value for SR2.1