THEMIS
THEMIS User Manual - Rev. First Edition: 1.0 - Last Edition: 2.2 - Author: A.R. - Reviewed by S.R. -Copyright © 2022 SECO S.p.A.
32
M.2 2230 Socket 1 Key E Connectivity Slot
It is possible to increase the connectivity of the THEMIS board by using M.2 Socket 1 Key E connectivity slot.
The connector used for the M.2 Connectivity slot is CN36,
which is a standard 75 pin M.2 Key E connector, type
LOTES p/n APCI0076-P001A, H=4.2mm, with the pinout
shown in the table on the left.
On the THEMIS board there is also a Threaded Spacer
which allows the placement of M.2 Socket 1 Key E connectivity modules in 2230 size.
Signals Description
/ USB_P2-: USB Port #2 differential pair; it is managed by Microchip USB4604
Hub controller
’
s Downstream Port #2.
M2_KEYE_PRST#: M.2 Key E input for detection when a module is inserted in the slot.
Active low signal, electrical level +3.3V_RUN with a 100K
Ω
pull-up resistor.
P/PCIE1_TX-: PCI Express lane #1, Transmitting Output Differential pair
P/PCIE1_RX-: PCI Express lane #1, Receiving Input Differential pair
PCIE_K / PCIE_KEYE_CLK-: Dedicated PCI Express Reference Clock
PCIE_CTL1_RST1#: Reset Signal that is sent from the SoC to all PCI-e devices available
on the board. It is a +3.3V_RUN active-low signal with 100k
Ω
pull-down.
PCIE_CTL1_CLK_REQ: PCI-e Clock Request Input. Active low signal, electrical level
+3.3V_RUN with a 47K
Ω
pull-up resistor. 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.
PCIE_CTL1_WAKE: Board
’
s Wake Input, it must be externally driven by the module inserted
in the slot when it requires waking up the system. Active low signal, electrical level
+3.3V_RUN with a 47K
Ω
pull-up resistor
M2_KEYE_W_DIS1# / M2_KEYE_W_DIS2#: M.2 Key E Wireless module functionality
disable signal #1 and #2, active low outputs.
M2_KEYE_I2C_SDA: I2C Bus data line. Bidirectional signal, electrical level +3.3V_RUN with
a 2K2
Ω
pull-up resistor.
M2_KEYE_I2C_SCL: I2C Bus clock line. Electrical level +3.3V_RUN with a 2K2
Ω
pull-up
resistor.
M.2 Connectivity Slot (Socket 1 Key E type 2230) CN36
Pin Signal
Pin Signal
1
GND
2
+3.3V_RUN
3
4
+3.3V_RUN
5
USB_P2-
6
---
7
GND
8
---
9
---
10
---
11
---
12
---
13
---
14
---
15
---
16
---
17
---
18
M2_KEYE_PRST#
19
---
20
---
21
---
22
---
23
---
32
---
33
GND
34
---
35
PC
36
---
37
PCIE1_TX0-
38
---
39
GND
40
---
41
PC
42
---
43
PCIE1_RX0-
44
---
45
GND
46
---
47
PCIE_K
48
---
