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Edge Connector

LattePanda Mu Ultra x86 compute module utilizes a 260-Pin Edge Connector, physically compatible with standard laptop DDR4 SODIMM memory sockets — the same connector form factor as the LattePanda Mu.

Pinout Is Not a Standard DDR4 Slot

Although the LattePanda Mu Ultra physically fits a standard 260-pin SO-DIMM DDR4 slot, its pinout is uniquely defined by LattePanda. Never install it in a standard DDR4 memory slot or on carrier boards designed for other compute modules. Powering it on in an incompatible slot will cause permanent damage.

Pinout

Given the high-density edge connector and the versatile pin definitions of the LattePanda Mu Ultra compute module, we provided the detailed pin introduction into the separate LattePanda Mu Ultra Pinout Documentation.

Mechanical Specs

LattePanda Mu Ultra Dimension

  • Height from PCB surface to the top of the processor thermal pad: 1.15 mm
  • Height from PCB surface to the top of the processor memory chip: 1.61 mm
  • Maximum component height on the top side (processor side): 3 mm
  • Maximum component height on the bottom side: 2 mm

Socket Selection Guidelines

While compatible with standard DDR4 sockets, strict adherence to the following selection rules is required to ensure proper mechanical fit and electrical connectivity.

Critical Rules

  • Pin Count: Must use a 260-Pin DDR4 SODIMM socket.
  • Orientation: Must use Standard (STD) type sockets, not Reverse (RVS) type sockets.
How to identify a Standard (STD) socket?
  • Marking: Most sockets have "STD" stamped on the plastic body.
  • Notch Position: When facing the socket opening (as if inserting the module) with the pads facing down, the Keying Notch should be offset to the LEFT. DDR4 Socket Position

  • Height Requirement: Socket height should be ≥ 5.2 mm (while carrier board areas beneath the compute module without components)

    Due to the retention screws and passive components on the back of the Compute Module, the socket must provide sufficient bottom clearance.

  • Recommended Parts

    Height Brand Part Number
    8.0mm TE Connectivity 2309411-1
    9.2mm FOXCONN ASAA821-EASB0-7H
    9.2mm LOTES ADDR0110-P005A
    5.2mm LOTES ADDR0207-P001A

Solderable Standoff Selection Guidelines

After inserting the LattePanda Mu Ultra into the SODIMM socket, it must be secured to the carrier board using screws and standoff.

Solderable Standoff

The height of the standoff on the carrier board must match the SODIMM socket height to ensure the compute module sits flat.

SODIMM Socket Height Recommended Standoff Height
8.0mm 5.5mm
9.2mm 6.6mm
5.2mm 2.6mm
  • Recommended Tolerance：±0.1mm
  • Standoff Height: The distance from the PCB surface to the top surface of the standoff.

For example, on the DFR1142 Lite carrier board, the socket height is 8.0 mm; therefore, the standoff height is 5.5 mm (shown below), and the fixing screw diameter is 2 mm.

Solderable Standoff