M.2

M.2 (the bus formerly known as NGFF) is a new, more flexible alternative to PCI Express Mini Cards (mPCIe) for use as a multi-purpose small-form-factor embedded computer expansion bus. Designed for versatility, M.2 supports both smaller and larger footprints than mPCIe, and consumes less power, making it a perfect choice for a variety of embedded applications.

Versatility

M.2 is quite versatile, with a flexible selection of busses provided at the 75-pin connector (like PCIe, SATA, USB, and I2C) as determined by each computer manufacturer. To ensure any given peripheral will be supported by any host computer's particular slot's features a connector-key system was implemented. Similar to the various "notches" on DIMM sticks each M.2 device will have notches that prevent installation in incompatible computer slots, and which indicate the specific bus capabilities they require. For example, M.2 cards with the "M" key-notch will work in host slots that provide 4-lane PCI Express, SATA, and SMBUS interfaces. Cards with the "B" key might need one or more of the 2-lane PCIe, SATA, USB3, USB2, UIM, SSIC, HSIC, I2C, SMBus, or audio interfaces. Multiple keys might be notched on a particular M.2 device, and much can be learned from this. A device with both the "B" and "M" key can work in either socket-type and thus must be using only interfaces present on both: 2-lane PCI Express, SATA, or SMBus, in this example.

A Variety of Footprints

Embedded applications come in all shapes and sizes, from wearables to aircraft, and M.2 provides a one-bus-fits-all solution to this myriad of target form-factors. Available in dozens of different footprints, from a 12mm × 16mm, soldered-in-place version and the largest at 30mm × 110mm, all use the same bus signals and software interfaces. This common electrical interface, common software interface, and well-defined feature/key system together ensure adding data acquisition and control devices to your project is easier than ever — even after your design is established.

ACCES standard footprint: TYPE 2280-D3-B-M, with a break-away to convert to TYPE 2260-D3-B-M

Where: 22 - width in mm

80 or 60 - height in mm

D3¹ - thickness, first is a letter denoting a single- (S) or double- (D) sided option, while second character is a number 1, 2 or 3 denoting the maximum allowable thickness

B - ACCES M.2 cards are compatible with all B-type sockets

M - ACCES M.2 cards are also compatible with all M-type sockets

For a more detailed M.2 specification, visit http://www.pcisig.com/

Serial Communication M.2 PCI Express Cards

	SERIAL PORTS
Products	RS-232	RS-422	RS-485	Baud	PROT CFG	ISOLATION	LRG FIFO	Connector	RoHS
RS232, RS422 & RS485 M.2 Serial Cards
M.2-COM-4SM	4 Software Selectable			921.6k3	EEPROM		128-Byte	micro header + cable
M.2-COM-2SM	2 Software Selectable			921.6k3	EEPROM		128-Byte	micro header + cable
RS422 & RS485 M.2 Serial Cards
M.2-COM-4S		4 Software Selectable		921.6k3	EEPROM		128-Byte	micro header + cable
M.2-COM-2S		2 Software Selectable		921.6k3	EEPROM		128-Byte	micro header + cable
RS422 ONLY M.2 Serial Cards
M.2-ICM422-4		4		3Mbps		Yes	128-Byte	micro header + cable
M.2-ICM422-2		2		3Mbps		Yes	128-Byte	micro header + cable
M.2-ICM422-1		1		3Mbps		Yes	128-Byte	micro header + cable
RS485 ONLY M.2 Serial Cards
M.2-ICM485-4			4	3Mbps		Yes	128-Byte	micro header + cable
M.2-ICM485-2			2	3Mbps		Yes	128-Byte	micro header + cable
M.2-ICM485-1			1	3Mbps		Yes	128-Byte	micro header + cable
RS232 ONLY M.2 Serial Cards
M.2-ICM232-2	2			921.6k		Yes	128-Byte	micro header + cable
M.2-ICM232-4	4			921.6k		Yes	128-Byte	micro header + cable
M.2-COM232-4	4			921.6k			128-Byte	micro header + cable
M.2-COM232-2	2			921.6k			128-Byte	micro header + cable
Other M.2 Serial Cards
M.2-CAN-2 Coming Soon!	1 Dual-Wire CAN-bus port			25k-1MBit			n/a	micro header + cable
M.2-1394B-1 Coming Soon!	1 Port 1394B interface aka FireWire 800			800 Mbit/s			n/a	micro header + cable
Isolated M.2 Serial Cards
M.2-ICM485-4			4	3Mbps		Yes	128-Byte	micro header + cable
M.2-ICM422-4		4		3Mbps		Yes	128-Byte	micro header + cable
M.2-ICM232-4	4			921.6k		Yes	128-Byte	micro header + cable
M.2-ICM485-2			2	3Mbps		Yes	128-Byte	micro header + cable
M.2-ICM422-2		2		3Mbps		Yes	128-Byte	micro header + cable
M.2-ICM232-2	2			921.6k		Yes	128-Byte	micro header + cable
M.2-ICM485-1			1	3Mbps		Yes	128-Byte	micro header + cable
M.2-ICM422-1		1		3Mbps		Yes	128-Byte	micro header + cable
PROT CFG = protocol configuration *mPCIe full-length ** mPCIe half-length = Smallest mPCIe specification = Optionally available RoHS Ready

Digital I/O M.2 Bus DAQ Products

Products	# I/O	Buf	Prog	OPTOs	Relays	CTRS	COS	RoHS
TTL/CMOS M.2 Digital Cards
M.2-DIO-24A	24 I/O	Yes	Yes				Yes
M.2-DIO-24S	24 I/O	Yes	Yes				Yes
M.2-DIO-24	24 I/O	Yes	Yes
Solid-State Relay (FET) / Wide-voltage Isolated Input M.2 Digital Cards
M.2-IDIO-8	8 In/8 Out	Yes		Yes	8SS*		Yes
M.2-IDIO-4	4 In/4 Out	Yes		Yes	4SS*		Yes
Solid-State Relay (FET) Output Only M.2 Digital Cards
M.2-IDO-8	8 Out	Yes			8SS*
Electromechanical Relay / Wide-voltage Isolated Input M.2 Digital Cards
M.2-IIRO-8	8 In/8 Out	Yes		Yes	8		Yes
M.2-IIRO-4	4 In/4 Out	Yes		Yes	4		Yes
Electromechanical Relay Output ONLY M.2 Digital Cards
M.2-RO-8	8 Out	Yes			8
Wide-voltage Isolated Input ONLY M.2 Digital Cards
M.2-II-16	16 In	Yes		Yes			Yes
M.2-II-8	8 In	Yes		Yes			Yes
M.2-II-4	4 In	Yes		Yes			Yes
Buf = Buffered I/O   Prog = Programmable I/O   OPTOs = Optically Isolated   * Solid State CTRS = Counters/Timers   COS = Change Of State Detection   = Optionally available RoHS Ready