AM3359 datasheet(152/236 Pages) TI

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OFFSET

Recommended LPDDR

Device Orientation

OFFSET

LPDDR

Device

AM335x

AM3359, AM3358, AM3357

AM3356, AM3354, AM3352

SPRS717F – OCTOBER 2011 – REVISED APRIL 2013

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5.6.2.1.2.4 Placement

Figure 5-34 shows the required placement for the LPDDR devices. The dimensions for this figure are

defined in Table 5-35. The placement does not restrict the side of the PCB on which the devices are

mounted. The ultimate purpose of the placement is to limit the maximum trace lengths and allow for

proper routing space. For single-memory LPDDR systems, the second LPDDR device is omitted from the

placement.

Figure 5-34. AM335x Device and LPDDR Device Placement

Table 5-35. Placement Specifications(1)

NO.

PARAMETER

MIN

MAX

UNIT

X(2)(3)

1750

mils

Y(2)(3)

1280

mils

Y Offset(2)(3)(4)

650

mils

Clearance from non-LPDDR signal to LPDDR keepout region(5)(6)

(1) LPDDR keepout region to encompass entire LPDDR routing area.

(2) For dimension definitions, see Figure 5-34.

(3) Measurements from center of AM335x device to center of LPDDR device.

(4) For single-memory systems, it is recommended that Y offset be as small as possible.

(5) w is defined as the signal trace width.

(6) Non-LPDDR signals allowed within LPDDR keepout region provided they are separated from LPDDR routing layers by a ground plane.

152

Peripheral Information and Timings

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Product Folder Links: AM3359 AM3358 AM3357 AM3356 AM3354 AM3352

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