RD1-4028

RD1-4028 DVI to DisplayPort converter Reference board user guide Rev. B MegaChips’ Proprietary and Confidential This information shall not be shared or distributed outside the company and will be exchanged based on the signed proprietary information exchange agreement. MegaChips reserves the right to make any change herein at any time without prior notice. MegaChips does not assume any responsibility or liability arising out of application or use of any product or service described herein except as explicitly agreed upon. MegaChips’ Proprietary Information – Strictly Confidential Page 1 of 17 RD1-4028 Contents 1. Purpose and scope .................................................................................................................................... 4 2. Description.................................................................................................................................................. 4 2.1. 3. 4. Set up instructions............................................................................................................................... 4 2.1.1. I2C host port ................................................................................................................................ 5 2.1.2. In-System Programming (ISP) ..................................................................................................... 5 2.1.3. Diagnosis ..................................................................................................................................... 6 Board description ....................................................................................................................................... 7 3.1. Principal components and functions ................................................................................................... 9 3.2. Connector descriptions ..................................................................................................................... 10 3.3. Switches ............................................................................................................................................ 14 3.4. Stuffing options ................................................................................................................................. 15 3.4.1. Single/dual bus TTL input .......................................................................................................... 15 3.4.2. IROM/SPI-Flash ......................................................................................................................... 15 Revision history ........................................................................................................................................ 16 B0549-GUD-01 MegaChips’ Proprietary Information – Strictly Confidential Page 2 of 17 RD1-4028 List of tables Table 1. Principal components and functions................................................................................................ 9 Table 2. Document revision history ............................................................................................................. 16 List of figures Figure 1. Connection set up ........................................................................................................................ 5 Figure 2. Block diagram .............................................................................................................................. 7 Figure 3. Board picture................................................................................................................................ 8 B0549-GUD-01 MegaChips’ Proprietary Information – Strictly Confidential Page 3 of 17 RD1-4028 1. Purpose and scope This document provides description and setup instructions for the DisplayPort® transmitter STDP4028 reference design board [RD1-4028_400-533] targeted for DVI to DP conversion applications. 2. Description The STDP4028 is an integrated circuit featuring a four lane DisplayPort transmitter, quad LVDS /LVTTL receiver with I2S, and SPDIF audio inputs for digital audio-video conversion application. This device also includes SPI interface, I2C Slave (Host Interface), I2C Master Interface, UART (GProbe) interface, and general-purpose IO pins. The RD1-4028 is a low cost compact four layer board that includes necessary interfaces and features to fully demonstrate the STDP4028 transmitter functionalities. The RD1-4028 board includes discrete TMDS receiver chips, converting DVI signal into LVTTL input for STDP4028. This board is capable of handling both single link and dual link DVI input signals supporting video resolution from 640 x 480 up to 2560 x 1600. The RD1-4028 also features digital audio inputs SPIDIF and I2S up to 8 Ch. This reference design meets the following: 1. Stand-alone operation: Includes necessary firmware (either IROM or external SPI) to work independently; this means the intended functionalities are performed without depending on external controllers. 2. Slave configuration: Includes provision to configure the device by an external controller through the Host Interface to I2C. 2.1. Set up instructions The picture below is a connection diagram showing the RD1-4028 board used for transferring a PC DVI signal into a DisplayPort stream. This board uses the standard DisplayPort connector recommended in the DP 1.1a specification to connect the DisplayPort output from the board to the input of the DisplayPort monitor. B0549-GUD-01 MegaChips’ Proprietary Information – Strictly Confidential Page 4 of 17 RD1-4028 Figure 1. Connection diagram: PC DVI signal to DP stream 1. Connect the DVI output from a PC source to the RD1-4028 reference board using a DVI cable. 2. Connect the output to a DisplayPort monitor using a DP cable. The RD1-4028 board supports both single link and dual link DVI. 3. Connect the 12 V (4A) DC power brick supplied for powering the board. An external digital audio (I2S or SPDIF) source is recommended for testing digital audio conversion by the STDP4028 device into DisplayPort output. 4. Once the connection is established, power ON the PC, monitor, RD1-4028 (DP transmitter) board. An image should pop up on the screen within 5-6 seconds. Note: The default configuration is dual bus TTL (dual link DVI) video input and SPDIF audio in. For single bus TTL input (single link DVI), change the bootstrap setting Boot[5] to GND (populate R510 and remove 509). STDP4028 register setting changes are required in order to receive audio on I2S input. This can be done through I2C host configuration or through firmware changes. The RD1-4028 supports video resolution from 640 x 480 up to 2560 x 1600 and audio up to 8 Ch. 2.1.1. I2C host port Host connector (CN901) allows configuration of the STDP4028 IC from an external host (microcontroller) through conventional I2C interface. User can plug two wires into pin 5 and pin 6 of this connector to access the I2C port of the chip. STDP4028 default device ID is 0xE6/0xE7, but can be changed through bootstrap settings. Refer to the STDP4028 datasheet for further details. 2.1.2. In-System Programming (ISP) RD1-4028 uses SPI Flash to store the firmware. In case of a new firmware upgrade, the following method should be used. B0549-GUD-01 MegaChips’ Proprietary Information – Strictly Confidential Page 5 of 17 RD1-4028 • ISP through UART connector: Allows programming the SPI Flash through UART (RS232) connector. Requires GProbe board (RS232 converter circuit) and GProbe software tool (contact MegaChips). 2.1.3. Diagnosis If the image does not come up, follow the steps below for diagnosis. Note: The diagnosis requires the MegaChips GProbe software and hardware tool. Contact MegaChips for the GProbe software and board. 1. Install the GProbe diagnostic tool on a computer and set the baud rate to 115,200. 2. Connect GProbe board (not supplied) to the serial port (or USB port if using USB version) of the computer. 3. Connect the other end of the GProbe board to connector (CN902) on the RD1-4028 board using 4-wire cable (part of the GProbe board). Note: CHECK POLARITY while connecting the cable; Pin 1 is marked on the board. The 4-wire cable connection from CN504 to GProbe board is 1 to 1. 4. Hit the Reset button on the board (RESET SW901). You will see the firmware version and date of firmware in the GProbe window. This indicates the DP receiver IC is functional. If the message does not appear, reprogram the Flash using the ISP method described in the GProbe user guide. 5. Using an oscilloscope, check the video input and output from the STDP4028. Note: Refer to the STDP4028 datasheet for pinout descriptions. B0549-GUD-01 MegaChips’ Proprietary Information – Strictly Confidential Page 6 of 17 RD1-4028 3. Board description Figure 2. Block diagram Crystal gProbe Audio Conn DVI-D connector TTL/60bits DVI DP STDP4028 DVI Receiver SIL163 DDC EDID Aux I2C, UART, IR LDO B0549-GUD-01 Switch regulator Host Conn 12V supply MegaChips’ Proprietary Information – Strictly Confidential Page 7 of 17 SPI Flash DP Ext. Connector DVI Receiver SIL163 RD1-4028 Figure 3. B0549-GUD-01 Board picture MegaChips’ Proprietary Information – Strictly Confidential Page 8 of 17 RD1-4028 3.1. Principal components and functions Below is a summary of all necessary connectors, switches, and other components. Please refer to the latest board schematics for further details. Table 1. Principal components and functions B0549-GUD-01 Label Description RefDes Power Input (+12V) Input 12 V, down conversion to 5 V, 3.3 V, and 1.2 V. This board uses a switch regulator for 5 V and an LDO [lowdropout] for 3.3 V and 1.2 V. Note the analog and digital supplies (3.3A and 3.3D or 1.2A and 1.2D) are isolated using ferrite beads. CN301 STDP4028 The STDP4028 is capable of receiving and converting LVTTL video and I2S (or SPDIF) audio input into a DisplayPort output. This device offers LVTTL input interface configurable to map a wide range of display controller products. The 60-bit LVTTL input ports on STDP4028 can be mapped to transfer video data either in two pixels per clock or single pixel per clock of a chosen color depth. U601 DP Output DisplayPort output connector CN801 Flash The board includes an SPI Flash of 2 MB to hold the firmware. The SPI Flash can be programmed (ISP) through UART interface U602 DVI In DVI Input connector CN401 Sil163 DVI Receivers: The 48-bit TTL video output from DVI receivers are connected to the STDP4028. By default, DVI input is configured for a single link operation up to 165 MHz. In this case, both transmitters are operating at half the clock rate. A custom configuration is required for handling higher speed signals, such as WQXGA resolution. (Contact your local MegaChips FAE for support.) U401 U402 Digital Audio Input The I2S (8 channel) or S/PDIF (single wire, 3.3 V) audio input signals from the external audio Codec card are received by CN903. CN903 Analog S/PDIF Input Standard S/PDIF input connector. CN904 Host Interface Host Interface (I2C): This board includes a provision to access the STDP4028 device from an external host controller through the Host Interface (I2C port) connection. CN901 GProbe GProbe Interface (+3.3V logic): the board also includes a GProbe connector that connects to the STDP4028 UART port for communication with external PC sources for debug purposes. The MegaChips GProbe tool (software) and PC serial port interface board together create a debug environment for device debug and firmware update. The GProbe interface is also used for ISP purposes. CN902 Reset Reset Button, when pressed, triggers a system master reset through the internal reset circuitry. The reset button is used for system reset and debugging purposes and is not required for production board design as the STDP4028 produces an internal reset during power ON. SW901 MegaChips’ Proprietary Information – Strictly Confidential Page 9 of 17 RD1-4028 Label Description RefDes IR Input An IR connector for interfacing the IR receiver. CN601 AUX_I2C A simplified connector for Host Interface debug CN602 AUX_UART UART Interface (for UART-over-Aux testing) CN603 LED Single LED for indicating the power on status. D301 EDID EDID Option: Currently not populated to allow pass through. U604 Crystal An external crystal of 27 MHz. The design makes use of internal oscillator circuitry. X601 ESD Diodes ESD protection diodes for DisplayPort signal (main lanes, AUX, and HPD line). The board implements low cost ESD diodes. ESD801 ESD802 ESD803 ESD804 SW902 Switches UART between Host Interface & GProbe Interface (see mark on PCB). SW902 DVI Config The RD1-4028 board has a switch for DVI transmitter hardware configuration. The switch SW401 controls DVI Receivers U401 and U402. The switch position is logic HIGH, which is set for dual pixel input mode of operation with rising edge data sampling. The switch definitions are described in section 4.3. SW401 Bootstrap Options The bootstrap options can be configured for: − IROM/SPI Flash − Single/Dual TTL Refer to the datasheet for more details. R503 R504 R509 R510 3.2. Connector descriptions The RD1-4028 has the following connectors. The locations of these connectors are shown in the board picture in Figure 3. CN301 – +12V DC 4A Power Input Jack CN902 – GProbe Interface (4x1 pin keyed header) connects to the UART port of the STDP4028. Use the MegaChips GProbe board and interface cable for connecting the board to an external PC that has GProbe software running. Pin 1 +5V Pin 2 GPROBE_TX Pin 3 GPROBE_RX Pin 4 GND CN901 – I2C Host Interface (header 17X2) connector for connecting external host. This is used only when an external host controller accesses the DisplayPort transmitter; not used for normal operation. In normal B0549-GUD-01 MegaChips’ Proprietary Information – Strictly Confidential Page 10 of 17 RD1-4028 operation, internal MCU controls the overall functioning of the DisplayPort Transmitter (refer to the schematics for complete pin description for the Host Interface). Pin 1 & 2 +5V Pin 3 & 4 GND Pin 5 AUX_I2C_SCL Pin 6 AUX_I2C_SDA Pin 7 HOST_TX Pin 8 HOST_RX Pin 9 RESET from Host Pin 10 NC Pin 11 & 12 GND Pin 13 AUX_UART_TX Pin 14 AUX_UART_RX Pin 15 I2C_SCL Pin 16 I2C_SDA Pin 17 &18 NC Pin 19 & 20 GND Pin 21 & 22 NC Pin 23 IRQ/BOOT7 Pin 24 IR_IN Pin 25 & 26 NC Pin 27 & 28 GND Pin 29 GPIO_3/BOOT6 Pin 30 GPIO_0/BOOT3 Pin 31 TP901 Pin 32 GPIO_1/BOOT2 Pin 33 TP902 Pin 34 GPIO_2/BOOT5 CN801 – DisplayPort connector. Pin out details are shown below. B0549-GUD-01 Pin 1 ML_Lane 0(p) Pin 2 GND Pin 3 ML_Lane 0 (n) Pin 4 ML_Lane 1 (p) Pin 5 GND Pin 6 ML_Lane 1 (n) Pin 7 ML_Lane 2 (p) Pin 8 GND Pin 9 ML_Lane 2 (n) Pin 10 ML_Lane 3 (p) MegaChips’ Proprietary Information – Strictly Confidential Page 11 of 17 RD1-4028 Pin 11 GND Pin 12 ML_Lane 3 (n) Pin 13 GND Pin 14 GND Pin 15 AUX_CH (p) Pin 16 GND Pin 17 AUX_CH (n) Pin 18 Hot Plug Detect Pin 19 Return (GND) Pin 20 DP_PWR CN401 – DVI-D input dual link DVI connector. Pin out description for the DVI connector is shown below. B0549-GUD-01 Pin 1 RX2- Pin 2 RX2+ Pin 3 GND Pin 4 S_RX1- Pin 5 S_RX1+ Pin 6 DVI_SCL Pin 7 DVI_SDA Pin 8 NC Pin 9 RX1- Pin 10 RX1+ Pin 11 GND Pin 12 S_RX0- Pin 13 S_RX0+ Pin 14 DVI_+5V Pin 15 GND Pin 16 +5V Pin 17 RX0- Pin 18 RX0+ Pin 19 GND Pin 20 S_RX2- Pin 21 S_RX2+ Pin 22 GND Pin 23 RXC+ Pin 24 RXC- Pin C1 through C5 NC MegaChips’ Proprietary Information – Strictly Confidential Page 12 of 17 RD1-4028 CN904 – SPDIF Input connector. The pin out description is shown below. Pin 1 GND Pin 2 I2S_0 Pin 3 GND CN903 – I2S Digital Audio Input (52 pin) connector. B0549-GUD-01 Pin A1 NC Pin A2 & A3 GND Pin A4 through A6 NC Pin A7 GND Pin A8 & A9 NC Pin A10 I2S_3 Pin A11 I2S_2 Pin A12 I2S_1 Pin A13 NC Pin A14 I2S_0 Pin A15 DNP Pin A16 & A17 GND Pin A18 through A21 NC Pin A22 I2S_BCLK Pin A23 +5V Pin A24 I2S_WCLK Pin A25 & A26 +5V Pin B1 GND Pin B2 & B3 NC Pin B4 & B5 GND Pin B6 & B7 NC Pin B8 & B9 GND Pin B10 through B13 NC Pin B14 & B15 GND Pin B16 through B18 NC Pin B19 & B20 GND Pin B21 +12V Pin B22 NC Pin B23 +12V Pin B24 NC Pin B25 +12V Pin B26 GND MegaChips’ Proprietary Information – Strictly Confidential Page 13 of 17 RD1-4028 CN602 – I2C Host Interface (similar to CN901 with four pin header only, simplified version for debug purposes) Pin 1 +5V Pin 2 I2C_SCL Pin 3 I2C SDA Pin 4 GND CN603 – UART Interface (for UART-over-Aux testing) Pin 1 +5V Pin 2 Aux_UART_TX Pin 3 Aux_UART_RX Pin 4 GND 3.3. Switches DVI Configuration Switch (SW401): The RD1-4028 board has a switch for DVI transmitter hardware configuration. The switch SW401 controls DVI Receivers U401 and U402. The switch position is logic HIGH, which is set for dual pixel input mode of operation with rising edge data sampling. The switch definitions of SW401 are described below. SW Name Definitions SW401.1 /OCK_INV 1: Inverted ODCLK 0: Normal ODCLK SW401.3 SW401.4 ST 1: High Output Drive Strength 0: Low Output Drive Strength SW401.5 PIXS/M_S 1: 2-pixel/clock when in single link 0: 1-pixel/clock when in single link SW401.6 STAG_OUT 1: Normal Simultaneous Outputs (EVEN & ODD) 0: Staggered Output SW401.2 Host Interface Switch (SW902): This switch selects the use of GProbe connector or Host Interface connector. B0549-GUD-01 SW901.1 HOST_TX SW901.2 UART_TX SW901.3 GPROBE_TX SW901.4 HOST_RX SW901.5 UART_RX SW901.6 GPROBE_TX MegaChips’ Proprietary Information – Strictly Confidential Page 14 of 17 RD1-4028 3.4. Stuffing options 3.4.1. Single/dual bus TTL input Single TTL configuration: stuff R510, unstuff R509 Dual TTL configuration: stuff R509, unstuff R510 3.4.2. IROM/SPI-Flash OCM boot from IROM code: stuff R504, unstuff R503 OCM boot from external ROM code: stuff R503, unstuff R504 B0549-GUD-01 MegaChips’ Proprietary Information – Strictly Confidential Page 15 of 17 RD1-4028 4. Revision history Table 2. Document revision history Date Revision 27-Aug-2010 A Initial version. 03-Jun-2014 B Updated to comply with MegaChips documentation style/formatting. B0549-GUD-01 Changes MegaChips’ Proprietary Information – Strictly Confidential Page 16 of 17 RD1-4028 Notice Semiconductor products may possibly experience breakdown or malfunction. Adequate care should be taken with respect to the safety design of equipment in order to prevent the occurrence of human injury, fire or social loss in the event of breakdown or malfunction of semiconductor products The overview of operations and illustration of applications described in this document indicate the conceptual method of use of the semiconductor product and do not guarantee operability in equipment in which the product is actually used. The names of companies and trademarks stated in this document are registered trademarks of the relevant companies. MegaChips Co. provides no guarantees nor grants any implementation rights with respect to industrial property rights, intellectual property rights and other such rights belonging to third parties or/and MegaChips Co. in the use of products and of technical information including information on the overview of operations and the circuit diagrams that are described in this document. The product described in this document may possibly be considered goods or technology regulated by the Foreign Currency and Foreign Trade Control Law. In the event such law applies, export license will be required under said law when exporting the product. This regulation shall be valid in Japan domestic. In the event the intention is to use the product described in this document in applications that require an extremely high standard of reliability such as nuclear systems, aerospace equipment or medical equipment for life support, please contact the sales department of MegaChips Co. in advance. All information contained in this document is subject to change without notice. Copyright © 2014 MegaChips Corporation All rights reserved Contact MegaChips Corporation Head Quarters 1-1-1 Miyahara, Yodogawa-ku Osaka 532-0003, Japan TEL: +81-6-6399-2884 MegaChips Corporation Tokyo Office 17-6 Ichiban-cho, Chiyoda-ku, Tokyo 102-0082, Japan TEL: +81-3-3512-5080 MegaChips Corporation Makuhari Office 1-3 Nakase Mihama-ku Chiba 261-8501, Japan TEL: +81-43-296-7414 MegaChips Corporation San Jose Office 2033 Gateway Place, Suite 400, San Jose, CA 95110 U.S.A. TEL: +1-408-570-0555 MegaChips Corporation India Branch 17th Floor, Concorde Block UB City, Vittal Mallya Road, Bangalore 560-001, India TEL: +91-80-4041-3999 B0549-GUD-01 MegaChips Corporation Taiwan Branch RM. B 2F, Worldwide House, No.129, Min Sheng E. Rd., Sec. 3, Taipei 105, Taiwan TEL: +886-2-2547-1297 MegaChips Corporation Tainan Office RM. 2, 8F, No.24, Da Qiao 2 Rd., Yong Kang Dist., Tainan 710, Taiwan TEL: +886-6-302-2898 MegaChips Corporation Zhunan Office No.118, Chung-Hua Rd., Chu-Nan, Miao-Li 350, Taiwan TEL: +886-37-666-156 MegaChips Corporation Shenzhen Office Room 6307, Office Tower, Shun Hing Square, 5002 Shen Nan Dong Road, Luohu District, Shenzhen 518000, P. R. China TEL: +86-755-3664-6990 MegaChips’ Proprietary Information – Strictly Confidential Page 17 of 17