Seco Smarc CSM-B79 User Manual page 46

3.3.8 S-ATA connectors
M.2 SSD Slot (Socket 2 Key B type 2230/2242/2260)
Pin Signal
1 ---
3 GND
5 GND
7 ---
9 ---
11 GND
21 ---
23 ---
25 ---
27 GND
29 ---
31 ---
33 GND
35 ---
37 ---
39 GND
41 SATA_RX+
43 SATA_RX-
45 GND
47 SATA_TX-
49 SATA_TX+
51 GND
53 ---
CSM-B79
CSM-B79 User Manual - Rev. First Edition: 1.0 - Last Edition: 1.1 - Author: A.R - Reviewed by S.R. - Copyright © 2021 SECO S.p.A.
CN35
Pin Signal
2 +3.3V_RUN
4 +3.3V_RUN
6 ---
8 ---
10 ---
20 ---
22 ---
24 ---
26 ---
28 ---
30 ---
32 ---
34 ---
36 ---
38 ---
40 ---
42 ---
44 ---
46 ---
48 ---
50 ---
52 ---
54 ---
®
According to SMARC Rel. 2.1.1 specification, SMARC
SATA interface, but there are plenty of different devices that the customer could use.
For this reason, on CSM-B79 carrier board are available both a standard SATA Male
7 poles connector CN34 with dedicated power connector CN37 (par.3.3.9) and an
M.2 Slot for SSD on M.2 Socket 2 Key B form factor.
The connector used for the M.2 SSD slot is CN35,
which is a standard 75 pin M.2 Key B connector,
type LOTES p/n APCI0087-P001A, H=8.5mm, with
the pinout shown in the table on the left.
On the CSM-B79 carrier board there is also a
Threaded Spacer which allows the placement of M.2
Socket 2 Key B SSD modules in 2230, 2242 or 2260
size.
55 ---
57 GND
59 ---
61 ---
63 ---
65 ---
67 ---
69 SATA_M2_SELECT#
71 GND
73 GND
75 ---
®
module can offer only one
56 ---
58 ---
60 ---
62 ---
64 ---
66 ---
68 ---
70 +3.3V_RUN
72 +3.3V_RUN
74 +3.3V_RUN
46