Table of Contents
Advertisement
Quick Links
Advertisement
Table of Contents
Related Manuals for DFI EHL9A2
Summary of Contents for DFI EHL9A2
- Page 1 EHL9A2 COM Express Mini Module Carrier Board Design Guide © May 04, 2023 DFI Inc.
- Page 2 COM Express Specification Reference • Shielded interface cables must be used in order to comply with the emission limits. PICMG® COM Express® Module Base Specification. http://www.picmg.org/ Design Guide | EHL9A2...
-
Page 3: Table Of Contents
Chapter 3 - Carrier Board Schematic Guidelines ..............13 PCI Express Bus ........................13 Serial ATA ..........................16 Gigabit Ethernet (GBE) ......................18 HD Audio ..........................23 Universal Serial Bus 2.0 and 3.1 (USB 2.0 and 3.1) ............27 LVDS ............................32 Digital Display Interface .......................36 Miscellaneous ........................42 Design Guide | EHL9A2... - Page 4 • To reduce the risk of electric shock, unplug the power cord before removing the sys- tem chassis cover for installation or servicing. After installation or servicing, cover the system chassis before plugging the power cord. Design Guide | EHL9A2...
- Page 5 • Storage devices such as hard disk drive, etc. You will also need external system peripherals you intend to use which will normally include at least a keyboard, a mouse and a video display monitor. Design Guide | EHL9A2...
-
Page 6: Chapter 1 - Introduction
PCI Express, Serial ATA, USB 2.0, etc. Not only do COMs allow quick board are applicable and can be found in the PICMG Design Guide V1.0. Please contact DFI design, they also provide the benefits of easy installation, maintenance and upgrade ease. -
Page 7: Specification
1 x Intel I225IT / I225-LM (10/100/1000Mbps/2.5Gbps) ® 2 x USB 3.1 Gen2 8 x USB 2.0 SATA 2 x SATA 3.0 (up to 6Gb/s) eMMC 1 x 8GB/16GB/32GB/64GB*/128GB eMMC 5.1 (available upon request) 1 x 8-bit DIO Design Guide | EHL9A2... - Page 8 Humidity Operating: 5 to 90% RH Storage: 5 to 90% RH MTBF MECHANICAL Dimensions COM Express® Mini 84mm (3.3") x 55mm (2.16") Compliance PICMG COM Express® R3.0, Type 10 STANDARDS AND CER- Certification CE, FCC TIFICATIONS Design Guide | EHL9A2...
-
Page 9: Block Diagram
Chapter 1 INTRODUCTION X Block Diagram Design Guide | EHL9A2... -
Page 10: Board Layout
If a wrist strap is unavailable, establish and maintain contact with the system chassis throughout any procedures requiring ESD protection. Design Guide | EHL9A2... -
Page 11: Terminology
Integrated Drive Electronics (Advanced Technology Attachment) IDE (ATA) An interrupt request signal where x stands for interrupts A, B, C, INTx and D A local area network (LAN) is a computer network covering a small physical area Liquid Crystal Display Design Guide | EHL9A2... -
Page 12: Chapter 2 - Concept
Chapter 2 - Concept X COM Express Module Standards The figure below shows the dimensions of the different types of COM Express modules. EHL9A2 is a COM Express Mini. The dimension is 84mm x 55mm. Common for all Form Factors Extended only... -
Page 13: Chapter 3 - Carrier Board Schematic Guidelines
O output from the Module I/O bi-directional input/output signal OD open drain output Pwr Rail/Tolerance: power voltage EHL9A2: the description of Module board Carrier Board: suggestions for the design of customer’s carrier board Description: signal descriptions PCI Express Lanes Signals Descriptions... - Page 14 Use the exactly same package size for the capacitor on each signal in a differential pair. The reference for the PCI Express capacitor is indicated below. AC Coupling Min = 75 nF Capacitor Value Gen1 or Gen2 Max = 265 nF AC Coupling Min = 180 nF Capacitor Value Gen3 Max = 265 nF Design Guide | EHL9A2...
- Page 15 869.8 PCIE_TX2+ 6755 5386.7 85Ω±10% 866.7 PCIE_TX2- 537.5 PCIE_RX2+ 6755 5719.6 533.2 PCIE_RX2- 877.2 PCIE_TX3+ 6755 5377.4 878.0 PCIE_TX3- 478.7 PCIE_RX3+ 6755 5777.9 475.4 PCIE_RX3- 1996.60 PCIE_CK_REF+ 9000 6502.0 1999.30 PCIE_CK_REF- * Trace length Unit: mils Design Guide | EHL9A2...
-
Page 16: Serial Ata
Ethernet controller 0 1000Mbit/sec link indicator, active low. Pwr Rail/Tolerance: power voltage 2.5Gbps EHL9A2: the description of Module board Reference voltage for Carrier Board Ethernet channel 0 magnetics center Carrier Board: suggestions for the design of customer’s carrier board tap. The reference voltage is determined by the requirements of the Module PHY and may be as low as 0V and as high as 3.3V. - Page 17 Length SATA0_TX+ 1299.9 3200.1 5000 SATA0_TX- 1300.3 3199.7 SATA0_RX+ 1450.8 3049.2 5000 Differential SATA0_RX- 1452.2 3047.8 85Ω±10% SATA1_TX+ 921.9 3578.1 5000 SATA1_TX- 925.5 3574.5 SATA1_RX+ 1023.5 3476.5 5000 SATA1_RX- 1021.5 3478.5 * Trace length Unit: mils Design Guide | EHL9A2...
-
Page 18: Gigabit Ethernet (Gbe)
HDA_BITCLK I/O CMOS 3.3V/3.3V Serial data clock generated by the external CODEC(s). 24 MHz Serial Bit Clock for HDA CODEC. EHL9A2: the description of Module board HDA_SDOUT O CMOS 3.3V/3.3V series 33Ω resistor Serial TDM data output to the CODEC. - Page 19 Chapter 3 CARRIER BOARD SCHEMATIC GUIDELINES • Schematic Guidelines The RJ45 LAN connector has integrated into the isolated transformer inside. Design Guide | EHL9A2...
- Page 20 Additional Information: GST5009M is designed for a 1G BASE-T transformer, and EHL9A2 i225 supports the speed with 2.5G/1G/100M/10M. Based on the high performance of i225 and IEEE Standard Requirements & EMI Regulations, it is recommended to adjust the transformer as shown in the following lists.
- Page 21 Designing for Gigabit Ethernet operation is very similar to the designing for 10/100 Mbps. 10/100Mbps Ethernet has two differential pairs, and Gigabit Ethernet has four differential pairs. The figure below indicates the connections between 10/100M Ethernet and Gigabit Ethernet. Board-to-Board MDI0-3+/- Carrier Board COMe Module Design Guide | EHL9A2...
- Page 22 Chapter 3 CARRIER BOARD SCHEMATIC GUIDELINES • GBE0_MDI Layout Guidelines Please refer to the DFI layout checklist with detail. The following table provides the layout routing guidelines of the Gigabit Ethernet interface. Parameter Main Route Guidelines Breakout Guidelines Notes Signal Group...
-
Page 23: Hd Audio
O output from the Module I/O bi-directional input/output signal OD open drain output Pwr Rail/Tolerance: power voltage EHL9A2: the description of Module board Carrier Board: suggestions for the design of customer’s carrier board Description: signal descriptions HDA Signals Descriptions Signal... - Page 24 COM Express Module by using the other designated signals HDA_SDIN[1:2]. Notes: EHL9A2 is not support HDA_SDIN2. Connect the primary audio codec to the serial data input signal 'HDA_SDIN0' and ensure that the corresponding bit clock input signal 'HDA_BITCLK' is connected to the HDA interface of the COM Express Module.
- Page 25 226P,16V 75,1 75,1 MIC2-JD 20K,1 20K,1 FRONT-IO-SENSE 226P,16V 226P,16V 75,1 75,1 LINE2-JD 39.2K,1 39.2K,1 BAT54A BAT54A 2X5-1 2X5-1 Design Guide | EHL9A2 WB2X5K8 WB2X5K8 22K,1 22K,1 A_GND 22K,1 22K,1 22K,1 22K,1 4.7K,1 4.7K,1 4.7K,1 4.7K,1 22K,1 22K,1 A_GND 4.7K,1 4.7K,1 4.7K,1...
- Page 26 Actual (Intel Spec) Length HDA_RST# 2693.2 9783 12976 HDA_SYNC 12976 2707.1 10269 HDA_BITCLK 12976 2630.7 Single End 9846 HDA_SDOUT 50Ω±5% 12976 2456.4 10520 HDA_SDIN0 12976 1909.8 10567 HDA_SDIN1 12976 1889.1 11087 * Trace length Unit: mils Design Guide | EHL9A2...
-
Page 27: Universal Serial Bus 2.0 And 3.1 (Usb 2.0 And 3.1)
O output from the Module I/O bi-directional input/output signal OD open drain output Pwr Rail/Tolerance: power voltage EHL9A2: the description of Module board Carrier Board: suggestions for the design of customer’s carrier board Description: signal descriptions Design Guide | EHL9A2... - Page 28 3.3V Suspend/3.3V N.C. that a host is present. Module USB client may detect the presence of a USB host on USB7. A high value indicates USB7_HOST_PRSNT I CMOS 3.3V Suspend/3.3V N.C. that a host is present. Design Guide | EHL9A2...
- Page 29 Display Ports & USB_3.0/2.0 Display Ports & USB_3.0/2.0 Size Size Size Document Number Document Number Document Number COM331-B COM331-B COM331-B Design Guide | EHL9A2 Date: Date: Date: Thursday, August 09, 2012 Thursday, August 09, 2012 Thursday, August 09, 2012 Sheet Sheet Sheet...
- Page 30 5534.7 USB5+ 1056.3 8443.7 5443.7 10000 7000 USB5- 1059.1 8440.9 5440.9 USB6+ 999.3 8500.7 5500.7 10000 7000 USB6- 998.8 8501.2 5501.2 USB7+ 1098.5 8401.5 5401.5 10000 7000 USB7- 1099.6 8400.4 5400.4 * Trace length Unit: mils Design Guide | EHL9A2...
- Page 31 1152.3 2267.7 3696.3 3920 6464 USB_SSRX0- 1154.1 2765.9 3698.1 Differential USB_SSTX1+ 1055.1 2364.9 3599.1 80Ω±10% 3920 6464 USB_SSTX1- 1058.7 2861.3 3602.7 USB_SSRX1+ 1026.2 2393.8 3570.2 3920 6464 USB_SSRX1- 1026.9 2893.1 3570.9 * Trace length Unit: mils Design Guide | EHL9A2...
-
Page 32: Lvds
O output from the Module I/O bi-directional input/output signal OD open drain output Pwr Rail/Tolerance: power voltage EHL9A2: the description of Module board Carrier Board: suggestions for the design of customer’s carrier board Description: signal descriptions LVDS Signals Descriptions Signal... - Page 33 The LVDS signals can be routed directly from the COM Express module to the LVDS connectors. The figures listed below indicate one pair of LVDS display. Each pair can use the common-mode choke for EMI compliance if needed. Design Guide | EHL9A2...
- Page 34 BTB Pin Name BTB Pin# Number Number Length Board Trace BTB Length (Intel Spec) Trace Length (Intel Spec) Actual (Intel Spec) Length LVDS_I2C_CK/eDP_AUX+ 692.1 3807.9 "Single End 5000 50Ω±10%" LVDS_I2C_DAT/eDP_AUX- 720.6 3779.4 * Trace length Unit: mils Design Guide | EHL9A2...
- Page 35 Traces must be ground referenced. • When choosing cables, it is important to remind that the differential impedance of cable should be 100Ω. The cable length should be less than 0.5 meter for better signal quality. Design Guide | EHL9A2...
-
Page 36: Digital Display Interface
O output from the Module I/O bi-directional input/output signal OD open drain output Pwr Rail/Tolerance: power voltage EHL9A2: the description of Module board Carrier Board: suggestions for the design of customer’s carrier board Description: signal descriptions Design Guide | EHL9A2... - Page 37 When HDMI/DVI is directly done on the Carrier Board, this pin shall be pulled to If pulled-high the AUX pair contains the CRTLCLK and CTRLDATA signals. 3.3V with a 100k Ohm resistor to configure the DDI[0]_AUX pairs as DDC channels. Design Guide | EHL9A2...
- Page 38 CPU and display devices. eDP is derived from Display- Port; however, it utilizes advanced power-saving features that will save overall system power and prolong the battery life of many embedded displays of the device. Design Guide | EHL9A2...
- Page 39 Board Trace BTB Length Spec) Trace Length Spec) Actual Spec) Length DDI0_CTRLCLK_AUX+ 3131.6 8368.4 No explicit limit Differential use of vias, use 12000 85Ω±10% best known DDI0_CTRLCLK_AUX- 3133.7 8366.3 routing practices. * Trace length Unit: mils Design Guide | EHL9A2...
- Page 40 Carrier Board maximum BTB Pin Name BTB Pin# Number (Intel Number Length (Intel Board Trace BTB Length Spec) Trace Length Spec) Actual Spec) Length HDMI0_CTRLCLK 1644 9273 Differential 11417 85Ω±11% HDMI0_CTRLDATA 1761.9 9155.1 * Trace length Unit: mils Design Guide | EHL9A2...
- Page 41 5598.6 LVDS_A1+/eDP_TX1+ 2941.6 5558.4 9000 LVDS_A1-/eDP_TX1- 2943 5557 LVDS_A0+/eDP_TX2+ 2977 5523 9000 Differential LVDS_A0-/eDP_TX2- 2975.4 5524.6 85Ω±10% LVDS_A_CK+/eDP_TX3+ 3067.4 5432.6 9000 LVDS_A_CK+/eDP_TX3- 3065.6 5434.4 LVDS_I2C_CK/EDP_AUX+ 3984.7 4515.3 9000 LVDS_I2C_DAT/EDP_AUX- 3984.4 4515.6 * Trace length Unit: mils Design Guide | EHL9A2...
-
Page 42: Miscellaneous
Actual Spec) Length GPO0/SD_CLK 1893 2607 GPO1/SD_CMD 1847.3 2652.7 GPI0/SD_DATA0 1858.8 2641.2 Single End GPI1/SD_DATA1 1868.3 2631.7 5000 50Ω±10% GPI2/SD_DATA2 1866.9 2633.1 GPI3/SD_DATA3 1870 2630 GPO3/SD_CD# 1831 2669 GPO2/SD_WP 1504.2 2995.8 * Trace length Unit: mils Design Guide | EHL9A2...