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2.2.6 MPCIE2 : Mini PCIe, mSATA
Both mSATA and Mini PCIe share the same form factor and similar electrical
pinout assignments on their connectors. There was no clear mechanism to
distinguish if a mSATA drive or a Mini PCIe device is plugged into the socket until
recently that SATA I/O issued an ECN change (ECN #045) to redefine pin43 on
mSATA connector as "no connect" instead of "return current path" (or GND).
When an mSATA drive is inserted, its pin-43 is "no connect", and the respective
pin on the socket is being pulled-up to logic 1. When a Mini PCIe device is
inserted, its pin-43 forces the respective pin on the socket to ground, or logic 0.
The pin assignments of MPCIE2 are listed in the following table :
4
3
3
1
1
Pin No.
51
49
47
45
43
25
22
20
39
40
41
5
4
1
3
2
39
37
35
33
31
29
27
25
23
21
19
17
©Vecow EXBC-1000 User Manual
4
4
1
6
4
3
Signal Name
Reserved
Reserved
Reserved
4
Reserved
SATA_PCIE_SEL
19
1
4
1
4
1
1
4
2
21
22
+3.3Vaux
+3.3Vaux
GND
GND
PETp0
PETn0
GND
GND
PERp0
PERn0
GND
Reserved
Reserved
1
1
39
8
1
4
40
3
1
1
1
7
Pin No.
52
50
48
46
L4
R10
44
R9
42
40
38
36
34
32
30
28
26
24
22
20
18
Mechanical Key
GETTING TO KNOW YOUR EXBC-1000
1
7
1
7
C1
260
259
10
C2
MPCIE2
Signal Name
+3.3Vaux
GND
+1.5V
1
2
1
3
10
1
Reserved
L5
1
L1
L8
R2
R20
R12
Reserved
18
14
9
R1
R19
R11
9
5
4
1
1
Reserved
GND
USB_D+
USB_D-
GND
SMB_DATA
SMB_CLK
+1.5V
GND
+3.3Vaux
PERST#
reserved
GND
1
1
10
3
1
5
1
4
52
8
7
1
14
2
8
5
4
7
1
17
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