DAC38RF83: Jesd204b lanes

Shlomi Is'hakov

Intellectual 270 points

Part Number: DAC38RF83

Does i need to match lenght the lanes?

I have 4 lanes .

shlomi

over 4 years ago

0 Kang Hsia over 4 years ago

TI__Guru 66004 points

Shlomi,

The JESD204B can allow lane skew up to within one multi-frame of JESD204 data format. The multi-frame is defined by the LMFS setting and K (number of frame per multi-frame) settings. The skew adjustment is made by the RBD (release buffer delay) of the JESD204. For detail, you may refer to the standard on JEDEC website.

-Kang

0 Shlomi Is'hakov over 4 years ago

Intellectual 270 points

L = 4

M = 8

F = 4

S = 1

K = 1

9.6Gbs per lane 4 lanes

What is the allow lane skew?

0 Kang Hsia over 4 years ago in reply to Shlomi Is'hakov

TI__Guru 66004 points

Hi,

your multi-frame is Lane rate/10bits per octet/4 octets per frame/1 frame per multi-frame = 240Mhz. This is about 4.16ns. To tolerate more lane skew, you may set K to higher number.

RF & microwave

RF & microwave forum

DAC38RF83: Jesd204b lanes