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TDA3: CK and ADDR_CTRL Routing Specification for TDA3-DDR

Part Number: TDA3

Hi team,

Regarding to TDA3x_ABF_SR2.0_DM_vA.pdf  p.242 table8-44, it is specified that "AS" maximum  length must be < 17ps.
But my customer can't design to keep this length. Other length prameters are longer than AS's length. Why AS's length is so short ?
 If there are some reason, please teach us that reason.

Regards,

Shinji Nishio