DS90UB949-Q1: Controlling from a microprocessor

Andrew Beck49

Part Number: DS90UB949-Q1

We're designing our own interface board that controls the DS90UB949 using our uP. We can successfully connect to our LCD using the DS90UB949-Q1EVM Eval Board, displaying a 1920 x1080 image - this requires Dual Link mode.

I've dumped the register values from the Eval board and programmed the DS90UB949 on our board with those value using our uP. Problem is that our board does not display the image. If I input a 720p image into the board it will display it, repeating 3 times on the LCD. Below are the register settings read from both ports of the DS90UB949 as well as the Eval board. Appreciate it if someone can give me an idea of what the issue is.

ID = _UB949
HDMI_0 = Port 0
HDMI_1 = Port 1
EVAL BD = DS90UB949-Q1EVM Eval Board

*** = Registers that are different

==================================================================
Register 0x00: HDMI_0 = 0x18 HDMI_1 = 0x1A EVAL BD = 0x18 *** I2C Device ID
Register 0x01: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 Reset
Register 0x03: HDMI_0 = 0xDA HDMI_1 = 0xDA EVAL BD = 0xDA General Configuration
Register 0x04: HDMI_0 = 0x80 HDMI_1 = 0x80 EVAL BD = 0x80 Mode Select
Register 0x05: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 I2C Master Config
Register 0x06: HDMI_0 = 0x58 HDMI_1 = 0x58 EVAL BD = 0x58 DES ID
Register 0x07: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 SlaveID[0]
Register 0x08: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 SlaveAlias[0]
Register 0x09: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 Reserved
Register 0x0A: HDMI_0 = 0x0C HDMI_1 = 0x00 EVAL BD = 0x07 *** Back Channel CRC Errors
Register 0x0B: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 Back Channel CRC Errors
Register 0x0C: HDMI_0 = 0x07 HDMI_1 = 0x05 EVAL BD = 0x07 *** General Status
Register 0x0D: HDMI_0 = 0x20 HDMI_1 = 0x20 EVAL BD = 0x10 *** GPIO[0] Config
Register 0x0E: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 GPIO[1] and GPIO[2] Config
Register 0x0F: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 GPIO[3] Config
Register 0x10: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 GPIO[5] and GPIO[6] Config
Register 0x11: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 GPIO[7] and GPIO[8] Config
Register 0x12: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 Datapath Control
Register 0x13: HDMI_0 = 0x88 HDMI_1 = 0x88 EVAL BD = 0x88 General Purpose Control
Register 0x14: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 BIST and DOPL Control
Register 0x15: HDMI_0 = 0x01 HDMI_1 = 0x01 EVAL BD = 0x01 I2C_VSELECT
Register 0x16: HDMI_0 = 0xFE HDMI_1 = 0xFE EVAL BD = 0xFE BCC Watchdog Control
Register 0x17: HDMI_0 = 0x1E HDMI_1 = 0x1E EVAL BD = 0x1E I2C Control
Register 0x18: HDMI_0 = 0x7F HDMI_1 = 0x7F EVAL BD = 0x7F SCL High Time
Register 0x19: HDMI_0 = 0x7F HDMI_1 = 0x7F EVAL BD = 0x7F SCL Low Time
Register 0x1A: HDMI_0 = 0x01 HDMI_1 = 0x01 EVAL BD = 0x01 Datapath Control 2
Register 0x1B: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 BIST BC Error Count
Register 0x1C: HDMI_0 = 0x01 HDMI_1 = 0x08 EVAL BD = 0x00 *** GPI Pin Status 1
Register 0x1D: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 GPI Pin Status 2
Register 0x1E: HDMI_0 = 0x01 HDMI_1 = 0x02 EVAL BD = 0x01 *** TX_PORT_SEL
Register 0x1F: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0xF3 *** Frequency Counter
Register 0x20: HDMI_0 = 0x0B HDMI_1 = 0x0F EVAL BD = 0x0B *** Deserializer Capabilities 1
Register 0x21: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 Deserializer Capabilities 2
Register 0x22: HDMI_0 = 0x25 HDMI_1 = 0x25 EVAL BD = 0x25 Reserved
Register 0x23: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 Reserved
Register 0x24: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 Reserved
Register 0x25: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 Reserved
Register 0x26: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 Link Detect Control
Register 0x27: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 Reserved
Register 0x28: HDMI_0 = 0x01 HDMI_1 = 0x01 EVAL BD = 0x01 Reserved
Register 0x29: HDMI_0 = 0x20 HDMI_1 = 0x20 EVAL BD = 0x20 Reserved
Register 0x2A: HDMI_0 = 0x20 HDMI_1 = 0x20 EVAL BD = 0x20 Reserved
Register 0x2B: HDMI_0 = 0xA0 HDMI_1 = 0xA0 EVAL BD = 0xA0 Reserved
Register 0x2C: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 Reserved
Register 0x30: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 SCLK_CTRL
Register 0x31: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 AUDIO_CTS0
Register 0x32: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 AUDIO_CTS1
Register 0x33: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 AUDIO_CTS2
Register 0x34: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 AUDIO_N0
Register 0x35: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 AUDIO_N1
Register 0x36: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 AUDIO_N2_COEFF
Register 0x37: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 CLK_CLEAN_STS
Register 0x38: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 Reserved
Register 0x39: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 Reserved
Register 0x3A: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 Reserved
Register 0x3B: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 Reserved
Register 0x3C: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 Reserved
Register 0x3D: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 Reserved
Register 0x3E: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 Reserved
Register 0x3F: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 Reserved
Register 0x40: HDMI_0 = 0x14 HDMI_1 = 0x14 EVAL BD = 0x14 Reserved
Register 0x41: HDMI_0 = 0x55 HDMI_1 = 0x55 EVAL BD = 0x55 Reserved
Register 0x42: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 Reserved
Register 0x43: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 Reserved
Register 0x44: HDMI_0 = 0x80 HDMI_1 = 0x80 EVAL BD = 0x80 Reserved
Register 0x45: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 Reserved
Register 0x46: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 Reserved
Register 0x47: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 Reserved
Register 0x48: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 APB_CTL
Register 0x49: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 APB_ADR0
Register 0x4A: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 APB_ADR1
Register 0x4B: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 APB_DATA0
Register 0x4C: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 APB_DATA1
Register 0x4D: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 APB_DATA2
Register 0x4E: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 APB_DATA3
Register 0x4F: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 BRIDGE_CTL
Register 0x50: HDMI_0 = 0x97 HDMI_1 = 0x97 EVAL BD = 0x97 BRIDGE_STS
Register 0x51: HDMI_0 = 0xA1 HDMI_1 = 0xA1 EVAL BD = 0xA1 EDID_ID
Register 0x52: HDMI_0 = 0x1E HDMI_1 = 0x1E EVAL BD = 0x1E EDID_CFG0
Register 0x53: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 EDID_CFG1
Register 0x54: HDMI_0 = 0x28 HDMI_1 = 0x28 EVAL BD = 0x28 BRIDGE_CFG
Register 0x55: HDMI_0 = 0x0C HDMI_1 = 0x0C EVAL BD = 0x0C AUDIO_CFG
Register 0x56: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 TMDS_FIFO
Register 0x56: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 TMDS_FIFO
Register 0x57: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 reserved
Register 0x58: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 reserved
Register 0x59: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 reserved
Register 0x5A: HDMI_0 = 0x94 HDMI_1 = 0x94 EVAL BD = 0xCD *** DUAL_STS
Register 0x5B: HDMI_0 = 0x20 HDMI_1 = 0x20 EVAL BD = 0x20 DUAL_CTL1
Register 0x5C: HDMI_0 = 0x02 HDMI_1 = 0x02 EVAL BD = 0x02 DUAL_CTL2
Register 0x5D: HDMI_0 = 0x06 HDMI_1 = 0x06 EVAL BD = 0x06 FREQ_LOW
Register 0x5E: HDMI_0 = 0x44 HDMI_1 = 0x44 EVAL BD = 0x44 FREQ_HIGH
Register 0x5F: HDMI_0 = 0x93 HDMI_1 = 0x8E EVAL BD = 0x97 *** HDMI_FREQ
Register 0x60: HDMI_0 = 0x22 HDMI_1 = 0x22 EVAL BD = 0x22 SPI_TIMING1
Register 0x61: HDMI_0 = 0x02 HDMI_1 = 0x02 EVAL BD = 0x02 SPI_TIMING2
Register 0x62: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 SPI_CONFIG
Register 0x64: HDMI_0 = 0x10 HDMI_1 = 0x10 EVAL BD = 0x10 PGCTL
Register 0x65: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 PGCFG
Register 0x66: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 PGIA
Register 0x67: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 PGID
Register 0x68: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 Reserved
Register 0x69: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 Reserved
Register 0x6A: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 Reserved
Register 0x6B: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 Reserved
Register 0x6C: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 Reserved
Register 0x70: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 SlaveID[1]
Register 0x71: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 SlaveID[2]
Register 0x72: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 SlaveID[3]
Register 0x73: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 SlaveID[4]
Register 0x74: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 SlaveID[5]
Register 0x75: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 SlaveID[6]
Register 0x76: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 SlaveID[7]
Register 0x77: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 SlaveAlias[1]
Register 0x78: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 SlaveAlias[2]
Register 0x79: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 SlaveAlias[3]
Register 0x7A: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 SlaveAlias[4]
Register 0x7B: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 SlaveAlias[5]
Register 0x7C: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 SlaveAlias[6]
Register 0x7D: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 SlaveAlias[7]
Register 0x80: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 Reserved
Register 0x81: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 Reserved
Register 0x82: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 Reserved
Register 0x83: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 Reserved
Register 0x84: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 Reserved
Register 0x90: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 Reserved
Register 0x91: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 Reserved
Register 0x92: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 Reserved
Register 0x93: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 Reserved
Register 0x94: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 Reserved
Register 0x98: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 Reserved
Register 0x99: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 Reserved
Register 0x9A: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 Reserved
Register 0x9B: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 Reserved
Register 0x9C: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 Reserved
Register 0x9D: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 Reserved
Register 0x9E: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 Reserved
Register 0x9F: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 Reserved
Register 0xA0: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 Reserved
Register 0xA1: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 Reserved
Register 0xA2: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 Reserved
Register 0xA3: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 Reserved
Register 0xC0: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 Reserved
Register 0xC1: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 Reserved
Register 0xC2: HDMI_0 = 0xA8 HDMI_1 = 0xA8 EVAL BD = 0xA8 Reserved
Register 0xC3: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 Reserved
Register 0xC4: HDMI_0 = 0x28 HDMI_1 = 0x68 EVAL BD = 0x28 *** Reserved
Register 0xC5: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 Reserved
Register 0xC6: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 HDCP_ICR
Register 0xC7: HDMI_0 = 0x60 HDMI_1 = 0x40 EVAL BD = 0x60 *** HDCP_ISR
Register 0xC8: HDMI_0 = 0xC0 HDMI_1 = 0xC0 EVAL BD = 0xC0 Reserved
Register 0xC9: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 Reserved
Register 0xCA: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 Reserved
Register 0xCB: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 Reserved
Register 0xCC: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 Reserved
Register 0xCE: HDMI_0 = 0xFF HDMI_1 = 0xFF EVAL BD = 0xFF Reserved
Register 0xD0: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 Reserved
Register 0xD1: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 Reserved
Register 0xD2: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 Reserved
Register 0xD3: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 Reserved
Register 0xE0: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 Reserved
Register 0xE1: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 Reserved
Register 0xE2: HDMI_0 = 0xA8 HDMI_1 = 0xA8 EVAL BD = 0xA8 Reserved
Register 0xE3: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 Reserved
Register 0xE4: HDMI_0 = 0x28 HDMI_1 = 0x68 EVAL BD = 0x28 *** Reserved
Register 0xE5: HDMI_0 = 0x38 HDMI_1 = 0x38 EVAL BD = 0x38 Reserved
Register 0xE6: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 Reserved
Register 0xE7: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 Reserved
Register 0xF0: HDMI_0 = 0x5F HDMI_1 = 0x5F EVAL BD = 0x5F HDCP_TX_ID0
Register 0xF1: HDMI_0 = 0x55 HDMI_1 = 0x55 EVAL BD = 0x55 HDCP_TX_ID1
Register 0xF2: HDMI_0 = 0x42 HDMI_1 = 0x42 EVAL BD = 0x42 HDCP_TX_ID2
Register 0xF3: HDMI_0 = 0x39 HDMI_1 = 0x39 EVAL BD = 0x39 HDCP_TX_ID3
Register 0xF4: HDMI_0 = 0x34 HDMI_1 = 0x34 EVAL BD = 0x34 HDCP_TX_ID4
Register 0xF5: HDMI_0 = 0x39 HDMI_1 = 0x39 EVAL BD = 0x39 HDCP_TX_ID5
Register 0xF6: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 Reserved
Register 0xF8: HDMI_0 = 0x00 HDMI_1 = 0x00 EVAL BD = 0x00 Reserved

over 7 years ago

0 Hamzeh Jaradat over 7 years ago

TI__Guru** 111590 points

Hello,

what Deserializer are you using on the Display? Please make sure it is not a 92x Deserializer because these does not support 1920x1080, then this behaviour will be normal.
What is the PCLK ?

0 Andrew Beck49 over 7 years ago in reply to Hamzeh Jaradat

Prodigy 60 points

The Deserializer is a DS90UH948. Note that I said we CAN display a 1920 x1080 image on our LCD using the Eval board. And, except for the processor, our board is virtually identical to the Eval board.

0 Hamzeh Jaradat over 7 years ago in reply to Andrew Beck49

TI__Guru** 111590 points

Hello,

from your own design you have two dumps, for Port0 and Port1, but for the EVM just one dump, why? can you also dump both ports?

Also on the EVM you have the dip-switches to configure the Hardware (MODE_SEL0 and MODE_SEL1). please make sure you have the same hardware congs on your design.

0 Andrew Beck49 over 7 years ago in reply to Hamzeh Jaradat

Prodigy 60 points

Both ports on the EVM board are the same register values, except for register 0x1E, which contains the PORT SELECT bits that determine which port is being read.

The MODE_SEL0 and MODE_SEL1 pins on our board are set the same as the pins on the EVM, as evidenced by register 0x13 which contains the 3-bit decode values for those two pins.

0 Andrew Beck49 over 7 years ago in reply to Andrew Beck49

Prodigy 60 points

Hamzeh, other than the datasheet, is there any documentation that describes how to program the chip? Is there any commands I need to send over the I2C port other then the register configuration?

0 Hamzeh Jaradat over 7 years ago in reply to Andrew Beck49

TI__Guru** 111590 points

Hello Andrew,

from the registers (reg 0x5A, 0x1C) above, it looks like there is only 1 link is active. You can try forcing Dual-link in reg 0x5B, also please check the settings of the 948 board if both links are active and not set to auto detect.
One more thing, the SER revisions are different between your board (RevD) and the EVM (RevA1). see reg 0x0D.

FYI, there is no other documents than the Datasheet.

0 Andrew Beck49 over 7 years ago in reply to Hamzeh Jaradat

Prodigy 60 points

Okay Hamzeh, Thanks.

I had tried forcing dual mode and that also didn't work. I did some test with various resolutions and I now believe that the problem may be hardware related. Perhaps with the PCB layout and the traces to the LVDS connector.

Andy

0 Andrew Beck49 over 7 years ago in reply to Andrew Beck49

Prodigy 60 points

Solved the problem. There was an issues with our 1.1V power supply that damaged the chip. Fixed the power supply and replaced the chip and everything is now working OK.

Thanks for your help.

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DS90UB949-Q1: Controlling from a microprocessor