ADS54J60: ADS54J60 configuration issue

Rahul chakrawal

Part Number: ADS54J60

Hello

I am trying to access JESD bank 0x6800 , 0x6900, 0x6A00. But I am unable to readback from the registers mentioned in these. Device clock of 200 MHz and continuous Sysref of 3.125 MHz is applied and I am giving hardware reset also after power up and digital reset also.

I am able to do write read in Analog Bank

Following are the register access commands

NOTE - adc_jesd_write is write function for spi write and adc_jesd_read is read function for spi read.

adc_jesd_write 0x0000 0x81

adc_jesd_write 0x4001 0x00

adc_jesd_write 0x4002 0x00

adc_jesd_write 0x4003 0x00
adc_jesd_write 0x4004 0x68

adc_jesd_write 0x60F7 0x01

adc_jesd_write 0x6000 0x01
adc_jesd_write 0x6000 0x00

adc_jesd_write 0x0011 0x80

adc_jesd_write 0x0059 0x20
adc_jesd_read 0x0059 ---- THIS WORKS FINE

adc_jesd_write 0x4003 0x00
adc_jesd_write 0x4004 0x69

adc_jesd_write 0x6000 0x80
adc_jesd_read 0x6000 ---- THIS DOESN'T WORK

adc_jesd_read 0x6001 ----- THIS DOESN'T WORK

KIndly help to resolve this issue.

Regards

Shashank

over 5 years ago

0 jim s over 5 years ago

TI__Guru* 91947 points

Shashank,

What settings do you have for R/W, M, P, and CH when doing a read for this address? They should be set to "1110" for a read of CHA and "1111" for a read of CHB.

Regards,

Jim

0 Rahul chakrawal over 5 years ago in reply to jim s

Prodigy 60 points

For reading, the MSB bit is becoming '1' within adc_jesd_read function, actually when I am giving command adc_jesd_read 0x6000 then adc_jesd_read function is making the MSB bit to '1' for reading, M is also '1', P is '1' too and CH = '0' always as I am not setting 4005h with 01h to enable separate control for both channels

0 jim s over 5 years ago in reply to Rahul chakrawal

TI__Guru* 91947 points

Rahul,

Are you following the power up sequence per the data sheet?

Regards,

Jim

0 Rahul chakrawal over 5 years ago in reply to jim s

Prodigy 60 points

Hi Jim,

Yes, I am following power up sequencing as per the datsheet,

And I found out the reason for not getting access of JESD bank register. The reason was that, By mistake I was setting the PWN pin to High. Now it is working fine by setting this pin LOW.

Thanks for you helpful support.

Thanks and regards

Rahul

0 Rahul chakrawal over 5 years ago in reply to Rahul chakrawal

Prodigy 60 points

Hi ,
That issue has been resolved by following points mentioned in above message.
Thanks and regards
Rahul

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ADS54J60: ADS54J60 configuration issue