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© 2021 Apacer Technology Inc.

3. Pin Assignments

This connector does not support hot plug capability. There are a total of 75 pins. 12 pin locations are

used for mechanical key locations; this allows such a module to plug into both Key B and Key M

connectors.

Table 3-1 Pin Assignments

Pin No.

Type

Description

1

GND

CONFIG_3 = GND

2

3.3V

3.3V source

3

GND

Ground

4

3.3V

3.3V source

5

N/C

No connect*

6

N/C

No connect*

7

N/C

No connect*

8

N/C

No connect*

9

GND

Ground

10

LED1#

Open drain, active low signal. These signals are used to allow the add-in

card to provide status indicators via LED devices that will be provided by

the system.

11

N/C

No connect*

12

Module Key B

Module Key

13

Module Key B

14

Module Key B

15

Module Key B

16

Module Key B

17

Module Key B

18

Module Key B

19

Module Key B

20

N/C

No connect*

21

GND

Ground

22

N/C

No connect*

23

N/C

No connect*

24

N/C

No connect*

25

N/C

No connect*

26

N/C

No connect*

27

GND

Ground

28

N/C

No connect*

29

PETn1

PCIe TX Differential signal defined by the PCI Express M.2 spec