MSC Technologies COM Express MSC C10-MB-EV User manual

User Manual
COM ExpressTM Mini-ITX Carrier
MSC C10-MB-EV
Type 10 Pin-out
Rev. 1.0 2018-10-24

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Preface
Copyright Notice
Copyright © 2014 MSC Technologies GmbH. All rights reserved.
Copying of this document, and giving it to others and the use or communication of the contents
thereof, is forbidden without express authority. Offenders are liable to the payment of damages.
All rights are reserved in the event of the grant of a patent or the registration of a utility model or
design.
Important Information
This documentation is intended for qualified audience only. The product described herein is not
an end user product. It was developed and manufactured for further processing by trained
personnel.
Disclaimer
Although this document has been generated with the utmost care, no warranty or liability for
correctness or suitability for any particular purpose is implied. The information in this document
is provided “as is” and is subject to change without notice.
EMC Rules
This unit has to be installed in a shielded housing. If not installed in a properly shielded
enclosure, and used in accordance with the instruction manual, this product may cause radio
interference in which case the user may be required to take adequate measures at his or her
owns expense.
Trademarks
All used product names, logos or trademarks are property of their respective owners.
Certification
MSC Technologies GmbH is certified according to DIN EN ISO 9001:2015 standards.
Life-Cycle-Management
MSC products are developed and manufactured according to high quality standards. Our life-
cycle-management assures long term availability through permanent product maintenance.
Technically necessary changes and improvements are introduced if applicable. A product-
change-notification and end-of-life management process assures early information of our
customers.
Product Support
MSC engineers and technicians are committed to provide support to our customers whenever
needed.
Before contacting Technical Support of MSC Technologies GmbH, please consult the
respective pages on our web site at www.msc-technologies.eu for the latest documentation,
drivers and software downloads.
If the information provided there does not solve your problem, please contact our Technical
Support: Email: [e-mail]
Phone: [phone]

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Content
1General Information......................................................................................................................... 5
1.1 Revision History........................................................................................................................ 5
1.2 Reference Documents............................................................................................................... 5
1.3 Introduction............................................................................................................................... 5
2Technical Description....................................................................................................................... 7
2.1 Key features.............................................................................................................................. 7
2.2 Block Diagram .......................................................................................................................... 8
2.3 Positioning of the Connectors and Jumper................................................................................ 9
3Mechanics ......................................................................................................................................10
3.1 Dimensions..............................................................................................................................10
3.2 Assembly notes........................................................................................................................10
3.3 Compact module......................................................................................................................11
4Hardware........................................................................................................................................11
4.1 Plug-in Position of the COM Express module ...........................................................................11
4.2 PCI Express Lanes ..................................................................................................................14
4.3 PCI e x16 Slot..........................................................................................................................14
4.4 PCI Express Mini Card.............................................................................................................17
4.5 Display Port (DP).....................................................................................................................18
4.6 Embedded Display Port (eDP)..................................................................................................19
4.7 LVDS Interface ........................................................................................................................21
4.7.1 LVDS EEPROM Socket ....................................................................................................22
4.7.2 Backlight Inverter Interface................................................................................................23
4.8 Audio.......................................................................................................................................24
4.8.1 HDA Connector.................................................................................................................24
4.8.2 SPDIF...............................................................................................................................25
4.9 SATA-Interface........................................................................................................................26
4.10 USB Topology......................................................................................................................27
4.10.1 USB Power Supply............................................................................................................28
4.10.2 USB Connectors...............................................................................................................28
4.10.3 USB Client Connector.......................................................................................................29
4.11 Ethernet................................................................................................................................29
4.12 LPC Connector.....................................................................................................................30
4.13 GPIO....................................................................................................................................31
4.13.1 GPIO Connector ...............................................................................................................31
4.13.2 SD Memory Card Connector.............................................................................................32
4.14 Super IO...............................................................................................................................33
4.14.1 SIO Configuration..............................................................................................................33
4.14.2 Parallel Port......................................................................................................................34
4.14.3 COM Ports COM1 COM2..................................................................................................34
4.14.4 PS/2 Connector.................................................................................................................35
4.14.5 Super IO Hardware Monitor...............................................................................................35
4.15 Fan Interface........................................................................................................................35
4.16 Serial I2C-Bus EEPROM......................................................................................................36
4.17 External SPI BIOS-Flash ......................................................................................................36
4.18 Feature Connector................................................................................................................37
4.19 Power Supply ATX Connector...............................................................................................37
4.20 Auxiliary Power Connector....................................................................................................39
4.21 Battery..................................................................................................................................39
4.22 Power Button........................................................................................................................40

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4.23 Reset Button.........................................................................................................................40
4.24 LEDs....................................................................................................................................40
4.25 WLAN LEDs.........................................................................................................................41
4.26 DIP Switches........................................................................................................................41
4.27 Ground Pins.........................................................................................................................41
4.28 Layout Revision....................................................................................................................42

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1 General Information
1.1 Revision History
Rev.
Date
Description
1.0
2018-10-24
Released version
1.2 Reference Documents
[1] COM Express Module Base Specification
COM Express Revision 2.1
Last update: April 10th, 2012
[2] PCI Local Bus Specification Rev. 2.1
PCI21.PDF
Last update: June 1st, 1995
http://www.pcisig.com
[3] Serial ATA Specification
Serial ATA 1.0 gold.pdf
Last update: August 29th, 2002 Rev.1.0
http://www.sata-io.org/
[4] IEEE Std. 802.3-2002
802.3-2002.pdf
http://www.ieee.org
[5] VESA Embedded DisplayPort Standard
eDP_v1_3 mem.pdf
Last update: 13.01.2012
http://www.vesa.org/
[6] Universal Bus Specification
usb_20.pdf
Last update: April 27th, 2000
http://www.usb.org
[7] Universal Serial Bus Revision 3.0 Specification
usb_30_spec_xxxxxx.zip
Last update: 13.08.2012
http://www.usb.org
1.3 Introduction
COM Express™ is an open specification from PICMG (PCI Industrial Computer Manufacturer
Group). It is a module concept to bring PCI Express and other newer technologies like SATA,
USB 3.0 and different display interfaces onto a COM (Computer On Module).

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A COM Express™ module is plugged onto an application-specific base board and offers a
migration path to future CPU technologies as they become available. Utilizing different form
factors, COM Express™ can be used for deeply embedded solutions all the way up to high
performance platforms.
For evaluation and design-in of the COM Express™ modules MSC offers evaluation
baseboards and development motherboards providing the interface infrastructure for the COM
Express™ module using PC type connectors for external access.
Currently four module sizes are defined in the COM Express Specification 2.1: the Mini Module,
the Compact Module, the Basic Module and the Extended Module. The main difference
between them is the over-all physical size and the performance envelope supported.
All module sizes of the same type use the same connectors and pin-outs and utilize several
common mounting hole positions. This level of compatibility permits a carrier board designed to
accommodate an Extended Module to also support a Basic or Compact Module.
Up to 440 pins are available between COM Express™ modules and the Carrier Board.
To enhance interoperability between COM Express™ modules and Carrier Boards, seven
common signaling configurations (Pin-out Types) have been defined to ease system integration.

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2 Technical Description
2.1 Key features
The MSC C10-MB-EV is designed as a type 10 carrier according to COM Express® Module
Base Specification Revision 2.1.
Key features include:
Interface for COM Express module type 10
Single 220 pin connector
PCIe x16 slot for up to PCIe x4
One PCI Express Mini Card slot
Support pins for two Express Cards on pin header
Up to six USB 2.0 ports; two on front panel; four on pin headers (two are shared with
mPCIe and USB client support)
Two USB 3.0 ports
Four shared USB over-current lines
Two Serial ATA connectors
Display interfaces
oDigital Display Interface (DDI) configured as Display Port
oJILI30 single channel 24-bit LVDS (shared with eDP)
oeDP shared with LVDS
High definition digital audio codec ALC888 or ALC886
oLineIn
oLineOut
oMicrophone
Single Gbit Ethernet interface
LPC header
Pin header for 8 GPIOs
SuperIO WinBond W83627THF
o2x RS-232 ports
o1x Parallel port
Power supply via ATX connector or power jack
+12V primary power supply input (Wide input range 4.75V –20.0V)
Note: Rev.1 supports only 7.5V –20V (LY10100102)
Warning: The input power pins are connect to the power pins at the COM Express
connector. Check the power input range from your COM Express module if you use
other power supply than 12V.
2x UART from module
On-board SPI Flash socket
3V battery
SD Card slot (signals shared with GPIOs)
Operating temperature range: Commercial 0 to +60°C
[At industrial temperature range (-40 to +85°C), functionality of some features is not
guaranteed (SIO, HDA), 3V battery must be removed]
Note: Support for all above features will also depend on the used COM Express module. Not all
modules support the maximum number of interfaces.

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2.2 Block Diagram
Figure 1 Block Diagram Carrier Board

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2.3 Positioning of the Connectors and Jumper
Illustration 1 Connectors overview
Illustration 2 Picture

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3 Mechanics
3.1 Dimensions
Dimension: 170 mm x 170 mm
Width: 1.6 mm + /-10%
Tolerances of the drill holes: +/- 0.1mm in X and Y
Tolerances of the diameter: + 0.1 mm
3.2 Assembly notes
Use these bolts for mounting different form factors:
COM Express Mini: 4x M2.5 x 5mm bolt
COM Express Compact: 4x M2.5 x 5mm bolt
COM Express Basic: 5x M2.5 x 5mm bolt

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3.3 Compact module
4 Hardware
4.1 Plug-in Position of the COM Express module
Socket for a COM Express type 10 module is available on the base board.
Specification:
Reference: X301
Connector: AMP / Tyco 3-1827233-6
0.5 mm pitch free height 220 pin 5H plug
Pin-out: Refer to COM Express specification for type 10 module [1]
Warning: The input power pins are connect to the power pins at the COM Express
connector. Check the power input range from your COM Express module if you use
other power supply than 12V.

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Row A
Row B
A1
GND
B1
GND
A2
GBE0_MDI3-
B2
GBE0_ACT#
A3
GBE0_MDI3+
B3
LPC_FRAME#
A4
GBE0_LINK100#
B4
LPC_AD0
A5
GBE0_LINK1000#
B5
LPC_AD1
A6
GBE0_MDI2-
B6
LPC_AD2
A7
GBE0_MDI2+
B7
LPC_AD3
A8
GBE0_LINK#
B8
LPC_DRQ0#
A9
GBE0_MDI1-
B9
LPC_DRQ1#
A10
GBE0_MDI1+
B10
LPC_CLK
A11
GND
B11
GND
A12
GBE0_MDI0-
B12
PWRBTN#
A13
GBE0_MDI0+
B13
SMB_CK
A14
GBE0_CTREF
B14
SMB_DAT
A15
SUS_S3#
B15
SMB_ALERT#
A16
SATA0_TX+
B16
SATA1_TX+
A17
SATA0_TX-
B17
SATA1_TX-
A18
SUS_S4#
B18
SUS_STAT#
A19
SATA0_RX+
B19
SATA1_RX+
A20
SATA0_RX-
B20
SATA1_RX-
A21
GND
B21
GND
A22
USB_SSRX0-
B22
USB_SSTX0-
A23
USB_SSRX0+
B23
USB_SSTX0+
A24
SUS_S5#
B24
PWR_OK
A25
USB_SSRX1-
B25
USB_SSTX1-
A26
USB_SSRX1+
B26
USB_SSTX1+
A27
BATLOW#
B27
WDT
A28
ATA_ACT#
B28
AC/HDA_SDIN2
A29
AC/HDA_SYNC
B29
AC/HDA_SDIN1
A30
AC/HDA_RST#
B30
AC/HDA_SDIN0
A31
GND
B31
GND
A32
AC/HDA_BITCLK
B32
SPKR
A33
AC/HDA_SDOUT
B33
I2C_CK
A34
BIOS_DIS0#
B34
I2C_DAT
A35
THRMTRIP#
B35
THRM#
A36
USB6-
B36
USB7-
A37
USB6+
B37
USB7+
A38
USB_6_7_OC#
B38
USB_4_5_OC#
A39
USB4-
B39
USB5-
A40
USB4+
B40
USB5+
A41
GND
B41
GND
A42
USB2-
B42
USB3-
A43
USB2+
B43
USB3+
A44
USB_2_3_OC#
B44
USB_0_1_OC#
A45
USB0-
B45
USB1-
A46
USB0+
B46
USB1+
A47
VCC_RTC
B47
EXCD1_PERST#
A48
EXCD0_PERST#
B48
EXCD1_CPPE#
A49
EXCD0_CPPE#
B49
SYS_RESET#
A50
LPC_SERIRQ
B50
CB_RESET#
A51
GND
B51
GND
A52
RSVD
B52
RSVD
A53
RSVD
B53
RSVD
A54
GPI0
B54
GPO1
A55
RSVD (PCIE_TX4+)
B55
RSVD (PCIE_RX4+)
A56
RSVD (PCIE_TX4-)
B56
RSVD (PCIE_RX4-)

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A57
GND
B57
GPO2
A58
PCIE_TX3+
B58
PCIE_RX3+
A59
PCIE_TX3-
B59
PCIE_RX3-
A60
GND
B60
GND
A61
PCIE_TX2+
B61
PCIE_RX2+
A62
PCIE_TX2-
B62
PCIE_RX2-
A63
GPI1
B63
GPO3
A64
PCIE_TX1+
B64
PCIE_RX1+
A65
PCIE_TX1-
B65
PCIE_RX1-
A66
GND
B66
WAKE0#
A67
GPI2
B67
WAKE1#
A68
PCIE_TX0+
B68
PCIE_RX0+
A69
PCIE_TX0-
B69
PCIE_RX0-
A70
GND
B70
GND
A71
LVDS_A0+
B71
DDI0_PAIR0+
A72
LVDS_A0-
B72
DDI0_PAIR0-
A73
LVDS_A1+
B73
DDI0_PAIR1+
A74
LVDS_A1-
B74
DDI0_PAIR1-
A75
LVDS_A2+
B75
DDI0_PAIR2+
A76
LVDS_A2-
B76
DDI0_PAIR2-
A77
LVDS_VDD_EN
B77
DDI0_PAIR4+
A78
LVDS_A3+
B78
DDI0_PAIR4-
A79
LVDS_A3-
B79
LVDS_BKLT_EN
A80
GND
B80
GND
A81
LVDS_A_CK+
B81
DDI0_PAIR3+
A82
LVDS_A_CK-
B82
DDI0_PAIR3-
A83
LVDS_I2C_CK
B83
LVDS_BKLT_CTRL
A84
LVDS_I2C_DAT
B84
VCC_5V_SBY
A85
GPI3
B85
VCC_5V_SBY
A86
RSVD
B86
VCC_5V_SBY
A87
eDP_HPD
B87
VCC_5V_SBY
A88
PCIE0_CK_REF+
B88
BIOS_DIS1#
A89
PCIE0_CK_REF-
B89
DD0_HPD
A90
GND
B90
GND
A91
SPI_POWER
B91
NC
A92
SPI_MISO
B92
NC
A93
GPO0
B93
NC
A94
SPI_CLK
B94
NC
A95
SPI_MOSI
B95
DDIO_DDC_AUX_SEL
A96
TPM_PP
B96
USB_HOST_PRSNT
A97
TYPE10#
B97
SPI_CS#
A98
SER0_TX
B98
RSVD
A99
SER0_RX
B99
RSVD
A100
GND
B100
GND
A101
SER1_TX
B101
FAN_PWNOUT
A102
SER1_RX
B102
FAN_TACHIN
A103
LID#
B103
SLEEP#
A104
VCC_12V
B104
VCC_12V
A105
VCC_12V
B105
VCC_12V
A106
VCC_12V
B106
VCC_12V
A107
VCC_12V
B107
VCC_12V
A108
VCC_12V
B108
VCC_12V
A109
VCC_12V
B109
VCC_12V
A110
GND
B110
GND
Table 1 COMExpress Connector Rows A and B

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4.2 PCI Express Lanes
Four PCIe lanes are defined at the Type10 COM Express module.
Three PCIe lanes are fixed routed to the PCIe x16 connector.
The PCIe Lane 3 can be routed to the PCIe x16 connector or to the PCI Express Mini Card
slot card slot. When J2001 is open PCIe x16 slot is selected. PCI Express Mini Card slot is
selected when J2001 is set. With setting J2002 the PCIe Mini Card slot can be set write
protected.
Note: The number of PCIe lanes available will depend on the COM Express module used –
not all modules can support 4 PCIe lanes.
4.3 PCI e x16 Slot
A PCIe x16 slot is provided for insertion of PCIe cards to a maximum of 4 PCIe lanes.
Specification:
References: X2701
Connector: AMP / Tyco 4-1612163-4
Pin-out: Refer to PCI express specification

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Pin
Signal
Pin
Signal
A1
PRSNT1# (GND)
B1
12V 1)
A2
12V 1)
B2
12V 1)
A3
12V 1)
B3
12V 1)
A4
GND
B4
GND
A5
JTAG_TCK not connected
B5
SMB_CLK
A6
JTAG_TDI not connected
B6
SMB_DAT
A7
JTAG_TDO not connected
B7
GND
A8
JTAG_TMS not connected
B8
3V3
A9
3V3
B9
JTAG_RST# not connected
A10
3V3
B10
3V3_AUX
A11
PE_RST#
B11
WAKE#
KEY
A12
GND
B12
RSVD
A13
REFCLK+
B13
GND
A14
REFCLK-
B14
PET_p0
A15
GND
B15
PET_n0
A16
PER_p0
B16
GND
A17
PER_n0
B17
PRSNT2#
A18
GND
B18
GND
A19
RSVD
B19
PET_p1
A20
GND
B20
PET_n1
A21
PER_p1
B21
GND
A22
PER_n1
B22
GND
A23
GND
B23
PET_p2
A24
GND
B24
PET_n2
A25
PER_p2
B25
GND
A26
PER_n2
B26
GND
A27
GND
B27
PET_p3
A28
GND
B28
PET_n3
A29
PER_p3
B29
GND
A30
PER_n3
B30
RSVD
A31
GND
B31
PRSNT2#
A32
RSVD
B32
GND
A33
RSVD
B33
PET_p4not connected
A34
GND
B34
PET_n4not connected
A35
PER_p4not connected
B35
GND
A36
PER_n4not connected
B36
GND
A37
GND
B37
PET_p5not connected
A38
GND
B38
PET_n5not connected
A39
PER_p5not connected
B39
GND
A40
PER_n5not connected
B40
GND
A41
GND
B41
PET_p6 not connected
A42
GND
B42
PET_n6 not connected
A43
PER_p6 not connected
B43
GND
A44
PER_n6 not connected
B44
GND
A45
GND
B45
PET_p7

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A46
GND
B46
PET_n7
A47
PER_p7 not connected
B47
GND
A48
PER_n7 not connected
B48
PRSNT2#
A49
GND
B49
GND
A50
RSVD
B50
PET_p8 not connected
A51
GND
B51
PET_n8 not connected
A52
PER_p8 not connected
B52
GND
A53
PER_n8 not connected
B53
GND
A54
GND
B54
PET_p9 not connected
A55
GND
B55
PET_n9 not connected
A56
PER_p9 not connected
B56
GND
A57
PER_n9 not connected
B57
GND
A58
GND
B58
PET_p10 not connected
A59
GND
B59
PET_n10 not connected
A60
PER_p10 not connected
B60
GND
A61
PER_n10 not connected
B61
GND
A62
GND
B62
PET_p11 not connected
A63
GND
B63
PET_n11 not connected
A64
PER_p11 not connected
B64
GND
A65
PER_n11 not connected
B65
GND
A66
GND
B66
PET_p12 not connected
A67
GND
B67
PET_n12 not connected
A68
PER_p12 not connected
B68
GND
A69
PER_n12 not connected
B69
GND
A70
GND
B70
PET_p13 not connected
A71
GND
B71
PET_n13 not connected
A72
PER_p13 not connected
B72
GND
A73
PER_n13 not connected
B73
GND
A74
GND
B74
PET_p14 not connected
A75
GND
B75
PET_n14 not connected
A76
PER_p14 not connected
B76
GND
A77
PER_n14 not connected
B77
GND
A78
GND
B78
PET_p15 not connected
A79
GND
B79
PET_n15 not connected
A80
PER_p15 not connected
B80
GND
A81
PER_n15 not connected
B81
PRSNT2# not connected
A82
GND
B82
RSVD
Table 2 Pin out PCIe x16 Slot
1) Note: The power at 12V PCIe, VCC_LCD (X1601), VCC_BL_EDP (X1602), VCC_BL
(X1101) and 12V fan power are switched off, when the power input is not in the range of
11V to 13V. In that case, you can feed 12V from an external power source at X1603 pin
4 to supply these connectors with power.

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4.4 PCI Express Mini Card
PCIe Lane 3 and the signals from USB port 6 switch to this slot if J2001 is set.
If the Mini Card slot is selected, PCIe Lane 3 at X2701 and USB port 6 at X1902 are no
longer useable. With the W_DISABLE# jumper J2002 the card slot can be set write
protected.
Specification:
References: X2001
Connector: FCI series 10019331
Pin-out: Refer to PCIe Mini Card Specification

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4.5 Display Port (DP)
Specification:
References: X801
Connector: Molex 1050200001
Pin-out: Refer to Table 3
Pin
Signal name
Function
1
LANE 0 +
LANE 0 positive data signal
2
GND
Ground
3
LANE 0 -
LANE 0 negative data signal
4
LANE 1 +
LANE 1 positive data signal
5
GND
Ground
6
LANE 1 -
LANE 1 negative data signal
7
LANE 2 +
LANE 2 positive data signal
8
GND
Ground
9
LANE 2 -
LANE 2 negative data signal
10
LANE 3 +
LANE 3 positive data signal
11
GND
Ground

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12
LANE 3 -
LANE 3 negative data signal
13
CONFIG1
CA_DET (cable detect)
14
CONFIG2
Ground
15
AUX CH +
Auxiliary Channel positive signal
16
GND
Ground
17
AUX CH -
Auxiliary Channel negative signal
18
HPDET
Hot Plug Detect
19
Return
Ground
20
DP_PWR
+3,3 VDC
Table 3 Pin-out Display Port
4.6 Embedded Display Port (eDP)
The signals of the eDP port are shared with the LVDS interface. To use the signals for the
eDP S2802 #3 has to be set on.
Specification:
References: X1602
Connector: Tyco 5-2069716-3, I-PEX 20455-040E-02
Pin-out: Refer to Table 4

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Pin
Signal name
Function
1
RSVD
Reserved for LCD manufacturer’s use
2
BL_PWR 2)
Backlight power
3
BL_PWR 2)
Backlight power
4
BL_PWR 2)
Backlight power
5
BL_PWR 2)
Backlight power
6
RSVD
SMBDAT
7
RSVD
SMBCLK
8
BL_PWM_DIM or NC
System PWM signal input for dimming
(Optional)
9
BL_ENABLE or NC
Backlight On/0ff (Optional)
10
BL_GND
Backlight ground
11
BL_GND
Backlight ground
12
BL_GND
Backlight ground
13
BL_GND
Backlight ground
14
HPD
Hot Plug Detect
15
LCD_GND
LCD logic and driver ground
16
LCD_GND
LCD logic and driver ground
17
LCD_GND
LCD logic and driver ground
18
LCD_GND
LCD logic and driver ground
19
LCD_Self_Test or NC
LCD Panel Self Test Enable n.c.
20
LCD_VCC 2)
LCD logic and driver power
21
LCD_VCC 2)
LCD logic and driver power
22
LCD_VCC 2)
LCD logic and driver power
23
LCD_VCC 2)
LCD logic and driver power
24
H_GND
High Speed Ground
25
AUX_CH_N
Auxiliary Channel negative signal
26
AUX_CH_P
Auxiliary Channel positive signal
27
H_GND
High Speed Ground
28
Lane0_P
LANE 0 positive data signal
29
Lane0_N
LANE 0 negative data signal
30
H_GND
High Speed Ground
31
Lane1_P
LANE 1 positive data signal
32
Lane1_N
LANE 1 negative data signal
33
H_GND
High Speed Ground
34
Lane2_P
LANE 2 positive data signal
35
Lane2_N
LANE 2 negative data signal
36
H_GND
High Speed Ground
37
Lane3_P
LANE 3 positive data signal
38
Lane3_N
LANE 3 negative data signal
39
H_GND
High Speed Ground
40
RSVD
Reserved for LCD manufacturer’s use
Table 4 Pin-out embedded Display Port
The supply voltage of the eDP logic and the eDP backlight can be adjusted with jumper JP1101 and
JP1102. The according position is printed on the PCB. Refer to chapter 4.7 LVDS-Interface.
2) Note: The power at 12V PCIe, VCC_LCD (X1601), VCC_BL_EDP (X1602), VCC_BL (X1101)
and 12V fan power are switched off, when the power input is not in the range of 11V to 13V. In
that case, you can feed 12V from an external power source at X1603 pin 4 to supply these
connectors with power.