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FM-XTDM2 (FM-2PCIE) Module

FM-XTDM2 FACE Module provide two optional mini PCI Express slots supporting either full or half size mechanical form factor. By default arrive with mechanical latches for full size modules, but can be adjusted for half size as well.
Refer to Compatibility Matrix for products fit.


  • 2x mini PCIe slots supporting mini PCI Express modules, featuring PCIe gen2 data rates (up to 5Gbps full duplex).
  • Full/half size modules mechanical form factor

FM-XTDM2 image.jpg

Block Diagram


Hardware Specifications

mini PCI Express edge connector pinout

mini PCI Express edge connector
Pin # Pin Name Signal Description Pin # Pin Name Signal Description
1 WAKE# Open drain, active low signal driven low by a mini PCIe card to reactivate the PCIe link 2 3.3Vaux 3.3V power rail
3 COEX1/Reserved Reserved for future wireless coexistence control interface between radios (if needed) 4 GND Ground connection
5 COEX2/Reserved 6 1.5V 1.5V power rail
7 CLKREQ# Clock request - open drain, active low driven by mini PCIe card to request PCIe reference clock 8 UIM_PWR/Reserved The UIM signals are defined on the system connector to provide the interface between the removable User Identity Module (UIM) Interface - an extension of SIM and WWAN.
9 GND Ground connection 10 UIM_DATA/Reserved
11 REFCLK- Reference clock used to assist the synchronization of PCI Express interface timing circuits 12 UIM_CLK/Reserved
13 REFCLK+ 14 UIM_RESET/Reserved
15 GND Ground connection 16 UIM_VPP/Reserved
Mechanical Notch Key
17 Reserved/UIM_C8 Reserved 18 GND Ground connection
19 Reserved/UIM_C4 Reserved 20 W_DISABLE# Active low signal when asserted by the system disable radio operation. Reserved for future use.
21 GND Ground connection 22 PERST# Asserted when power is switched off and also can be used by the system to force HW reset
23 PERn0 PCI Express differential receive pair 24 3.3Vaux 3.3V power rail
25 PERp0 26 GND Ground connection
27 GND Ground connection 28 1.5V 1.5V power rail
29 GND Ground connection 30 SMB_CLK Optional SMBus two-wire interface for Host/mini PCIe module communication
31 PETn0 PCI Express differential transmit pair 32 SMB_DATA
33 PETp0 34 GND Ground connection
35 GND Ground connection 36 USB_D- USB Host Interface
37 GND Ground connection 38 USB_D+
39 3.3Vaux 3.3V power rail 40 GND Ground connection
41 3.3Vaux 3.3V power rail 42 LED_WWAN# Active low output signals are provided to allow status indications to users via system provided LEDs
43 GND Ground connection 44 LED_WLAN#
45 Reserved Reserved for future second PCI Express Lane 46 LED_WPAN#
47 Reserved 48 1.5V 1.5V power rail
49 Reserved 50 GND Ground connection
51 Reserved 52 3.3Vaux 3.3V power rail