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Apalis Carrier Board Design Guide
Toradex AG l Altsagenstrasse 5 l 6048 Horw l Switzerland l +41 41 500 48 00 l
l
Page | 16
Figure 7: PCIe x1 slot reference schematic
2.2.2.2
Mini PCIe Card Schematic Example
The Mini PCIe Card (also called PCI Express Mini Card, Mini PCI Express or Mini PCIe) also features
a USB 2.0 high-speed interface. In order to be compliant, the carrier board needs to provide both
interfaces, the PCIe and USB. As most of the Mini PCIe Cards use only one of its interfaces for an
embedded carrier board which is developed for a restricted set of compatible cards, it might be
sufficient to implement only the required interface. Check with the Mini PCIe Card vendor whether
the USB, PCIe or both interfaces are used by the card.
The Mini PCIe Card features the decoupling capacitors for the RX lines on the card. Therefore, no
additional decoupling capacitors should to be placed on the carrier board in either the RX, TX or
reference clock lines.
Figure 8: Mini PCIe Card Block Diagram
The Apalis module standard does not feature a dedicated PCIe reset output as it does not provide
the PCIe hot-plug functionality. Therefore, the PCIe reset input (PERST#, pin 22) of the card should
be served by the general module reset output (RESET_MOCI#). Some Apalis modules might
provide the additional hot-plug signals such as reset and hot-plug detect as secondary functions or
as type-specific interfaces. Nevertheless, as compatibility between different Apalis modules could
PRSNT1#
A1
+12V
B1
+12V
A2
+12V
B2
+12V
A3
RSVD
B3
GND
A4
GND
B4
TCK
A5
SMCLK
B5
TDI
A6
SMDAT
B6
TDO
A7
GND
B7
TMS
A8
+3.3V
B8
+3.3V
A9
TRST#
B9
+3.3V
A10
+3.3VAux
B10
PERST#
A11
WAKE#
B11
GND
A12
RSVD
B12
A13
GND
B13
REFCLK-
A14
PET0+
B14
GND
A15
PET0-
B15
PER0+
A16
GND
B16
PER0-
A17
PRSNT2#
B17
GND
A18
GND
B18
X2
GND
GND
GND
GND
GND
GND
GND
GND
GND
RESET_MOCI#
WAKE1_MICO#
I2C1_SDA
I2C1_SCL
GND
PCIE1_PRSNT2#
TP1
R1
4.7K
22uF
16V
+
C2
GND
22uF
10V
+
C1
GND
I2C1[0..1]
3.3V_SW
3.3V_STB
3.3V_SW
3.3V
3.3V_SW
12V_SW
SYSTEM_CTRL[0..1]
PCIE1_RX_N
PCIE1_RX_P
PCIE1_TX_N
PCIE1_TX_P
PCIE1_CLK_N
PCIE1_CLK_P
12V_SW
12V_SW
3.3V_SW
12V_SW
12V_SW
MM70-314-310B1
PCIE1_RX-
41
Apalis - PCI-Express
18 of 25
P
43
PCIE1_TX-
47
P
49
PCIE1_CLK-
53
PC
55
X1R
PCIE1_RX_N
PCIE1_RX_P
PCIE1_TX_N
PCIE1_TX_P
PCIE1_CLK_N
PCIE1_CLK_P
PCIE1[0..5]
MM70-314-310B1
Apalis - I2C
7 of 25
I2C1_SDA
209
I2C1_SCL
211
X1G
I2C1_SDA
I2C1_SCL
MM70-314-310B1
POWER_ENABLE_MOCI
24
Apalis - System Control
4 of 25
RESET_MOCI#
26
RESET_MICO#
28
WAKE1_MICO#
37
X1D
RESET_MOCI#
WAKE1_MICO#
PCIE1_SMDAT
PCIE1_SMCLK
0R
R2
0R
R3
Optional
R4
4.7K
3.3V_SW
PCIe
Device
PCIe
Host
Apalis Module
Carrier Board
PCIe Mini Card
TX
RX
RX
TX
P
PCIE1_TX-
P
PCIE1_RX-
P
PCIE1_TX-
P
PCIE1_RX-
PET0+
PET0-
PER0+
PER0-
2x 100nF
2x 100nF
USBHn_D-
USBHn_D-
USB_D+
USB_D-
P
C
Ie
M
in
i C
ar
d
C
o
n
n
e
ct
o
r
M
o
d
u
le
C
o
n
n
e
ct
o
r
USB
Device
USB
Host