BOLT
UDOO BOLT User Manual - Rev. First Edition: 1.0 - Last Edition: 1.0 - Author: S.B. - Reviewed by L.V. Copyright © 2019 SECO S.p.A.
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3.3.9
M.2 NVMe Slot: Socket 3 Key M Type 2280
Another possibility for connecting mass storage devices is
given by the M.2 Key M Slot, which allows the plugging of
M.2 High Capacity SSD drives with PCI-e x4 interface.
The connector used for the M.2 SSD slot is CN17, which is a
standard 75 pin M.2 Key M connector, type LOTES p/n
APCI0096-P005H, H=8.5mm, with the pinout shown in the
table on the left.
On the UDOO BOLT board there is also a Threaded Spacer
which allows the placement of M.2 Socket 3 Key M PCI-e SSD modules in 2280 size.
Here following the signals related to this connectivity interface:
/GFX_Tx0-: PCI-e GFX port x4 lane #0, Transmitting Output Differential pair
/GFX_Rx0-: PCI-e GFX port x4 lane #0, Receiving Input Differential pair
/GFX_Tx1-: PCI-e GFX port x4 lane #1, Transmitting Output Differential pair
/GFX_Rx1-: PCI-e GFX port x4 lane #1, Receiving Input Differential pair
/GFX_Tx2-: PCI-e GFX port x4 lane #2, Transmitting Output Differential pair
/GFX_Rx2-: PCI-e GFX port x4 lane #2, Receiving Input Differential pair
/GFX_Tx3-: PCI-e GFX port x4 lane #3, Transmitting Output Differential pair
/GFX_Rx3-: PCI-e GFX port x4 lane #3, Receiving Input Differential pair
PCIe / PCIe4_Clock-: PCI Express Reference Clock for lane #4, Differential Pair
PLT_RST#: Reset Signal that is sent from the SoC to all PCI-e devices available on the board
(i.e. the GbE controller, the PCI-e based SSD modules plugged in the CN16 slot, the
connectivity modules plugged in CN18 slot, the PCI-e x4 NVMe modules plugged in CN17slot).
It is a 3.3V_RUN active-low signal.
GFX_REQ#: PCI Express GFX Clock Request Input, active low signal. This signal shall be driven
low by any module inserted in the connectivity slot, in order to ensure that the SoC makes
available the reference clock.
M.2 NVMe Slot - CN17
Pin Signal
Pin Signal
1
GND
2
+3.3V_RUN
3
GND
4
+3.3V_RUN
5
GFX_Rx3-
6
---
7
8
---
9
GND
10
---
11
GFX_Tx3-
12
+3.3V_RUN
13
14
+3.3V_RUN
15
GND
16
+3.3V_RUN
17
GFX_Rx2-
18
+3.3V_RUN
19
20
---
21
GND
22
---
23
GFX_Tx2-
24
---
25
26
---
27
GND
28
---
29
GFX_Rx1-
30
---
31
32
---
33
GND
34
---
35
GFX_Tx1-
36
---
37
38
---
39
GND
40
---
41
GFX_Rx0-
42
---
43
44
---
45
GND
46
---
47
GFX_Tx0-
48
---
49
50
PLT_RST#
51
GND
52
GFX_REQ#
