TDA3MV_17 Datasheet, PDF (242/256 Pages) Texas Instruments – SoC for Advanced Driver Assistance Systems (ADAS) 15mm Package (ABF) Silicon Revision 2.0

TDA3MV, TDA3MA
TDA3LX, TDA3LA
SPRS964C – JUNE 2016 – REVISED JULY 2017
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A8^(A)
CACLMX
CACLMY
A8^(A)
A8^(A)
A8^(A)
Rtt
A2
A3
A4
AT
Vtt
=
SPRS91v_PCB_DDR3_26
A. It is very likely that the longest CK/ADDR_CTRL Manhattan distance will be for Address Input 8 (A8) on the DDR3
memories. CACLM is based on the longest Manhattan distance due to the device placement. Verify the net class that
satisfies this criteria and use as the baseline for CK/ADDR_CTRL skew matching and length control.
The length of shorter CK/ADDR_CTRL stubs as well as the length of the terminator stub are not included in this
length calculation. Non-included lengths are grayed out in the figure.
Assuming A8 is the longest, CALM = CACLMY + CACLMX + 300 mils.
The extra 300 mils allows for routing down lower than the DDR3 memories and returning up to reach A8.
Figure 8-69. CACLM for Three Address Loads on One Side of PCB
242 Applications, Implementation, and Layout
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