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.
35
3.3.7
M.2 SATA/PCI-e Slot: Socket 2 Key B type 2242/2260
The mass storage capabilities of the UDOO BOLT are
completed by an M.2 SSD Slot, which allow plugging M.2
Socket 2 Key B Solid State Drives with SATA interface or PCI-
e x2 interface (PCI-e x1 is also supported).
The connector used for the M.2 SATA/PCI-e slot is CN18,
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 UDOO BOLT board there is also a Threaded Spacer
which allows the placement of M.2 Socket 2 Key B SATA/PCI-
e modules in 2260 size.
It is possible to place also modules in 2242 or 2260 size, by using a M/F Spacer which allows
fixing the M.2 module on the spacer already available on the PCB, deemed for the fixing of the
M.2 connectivity slot (see next paragraph)
Here following the signals related to the SATA interface:
S/SATA0_Tx-: Serial ATA Channel #0 Transmit differential pair
S/SATA0_Rx-: Serial ATA Channel #0 Receive differential pair
10nF AC series decoupling capacitors are placed on each line of SATA differential pairs.
Here following the signals related to the PCI-e interface:
P/PCIe0_TX-: PCI Express lane #0, Transmitting Output Differential pair
P/PCIe0_RX-: PCI Express lane #0, Receiving Input Differential pair
P/PCIe1_TX-: PCI Express lane #1, Transmitting Output Differential pair
P/PCIe1_RX-: PCI Express lane #1, Receiving Input Differential pair
PCIe / PCIe0_Clock-: PCI Express Reference Clock for lane #2, 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 CN18 slot, the PCI-e x4
NVMe modules plugged in CN17slot and the connectivity modules plugged in CN16 slot). It is
a 3.3V_RUN active-low signal.
M.2 SATA/PCI-e Slot CN18
Pin Signal
Pin Signal
1
---
2
+3.3V_RUN
3
GND
4
+3.3V_RUN
5
GND
6
---
7
---
8
---
9
---
10
---
11
GND
20
---
21
---
22
---
23
---
24
---
25
---
26
---
27
GND
28
---
29
PCIe1_Rx-
30
---
31
P
32
---
33
GND
34
---
35
PCIe1_Tx-
36
---
37
P
38
---
39
GND
40
---
41
S/PCIe0_Rx-
42
---
43
SATA0_Rx-/P
44
---
45
GND
46
---
47
SATA0_Tx-/PCIe0_Tx-
48
---
49
S/P
50
PLT_RST#
51
GND
52
PCIE_REQ0#
53
PCIe0_Clock-
54
---
55
PCIe
56
---
57
GND
58
---
