SNLS325D May   2010  – December 2016 DS92LV0421 , DS92LV0422

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1  Absolute Maximum Ratings
    2. 6.2  ESD Ratings
    3. 6.3  Recommended Operating Conditions
    4. 6.4  Thermal Information
    5. 6.5  Electrical Characteristics: Serializer DC
    6. 6.6  Electrical Characteristics: Deserializer DC
    7. 6.7  Electrical Characteristics: DC and AC Serial Control Bus
    8. 6.8  Timing Requirements: Serial Control Bus
    9. 6.9  Switching Characteristics: Serializer
    10. 6.10 Switching Characteristics: Deserializer
    11. 6.11 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagrams
    3. 7.3 Feature Description
      1. 7.3.1 Parallel LVDS Data Transfer (Color Bit Mapping Select)
      2. 7.3.2 Serial Data Transfer
      3. 7.3.3 Video Control Signal Filter
      4. 7.3.4 Serializer Functional Description
        1. 7.3.4.1 Signal Quality Enhancers
          1. 7.3.4.1.1 Serializer VOD Select (VODSEL)
          2. 7.3.4.1.2 Serializer De-Emphasis (DE-EMPH)
        2. 7.3.4.2 EMI Reduction Features
          1. 7.3.4.2.1 Data Randomization and Scrambling
          2. 7.3.4.2.2 Serializer Spread Spectrum Compatibility
        3. 7.3.4.3 Power-Saving Features
          1. 7.3.4.3.1 Serializer Power-Down Feature (PDB)
          2. 7.3.4.3.2 Serializer Stop Clock Feature
          3. 7.3.4.3.3 Serializer 1.8-V or 3.3-V VDDIO Operation
      5. 7.3.5 Deserializer Functional Description
        1. 7.3.5.1 Signal Quality Enhancers
          1. 7.3.5.1.1 Deserializer Input Equalizer Gain (EQ)
        2. 7.3.5.2 EMI Reduction Features
          1. 7.3.5.2.1 Deserializer VOD Select (VODSEL)
          2. 7.3.5.2.2 Deserializer Common-Mode Filter Pin (CMF) (Optional)
          3. 7.3.5.2.3 Deserializer SSCG Generation (Optional)
          4. 7.3.5.2.4 Power-Saving Features
            1. 7.3.5.2.4.1 Deserializer Power-Down Feature (PDB)
            2. 7.3.5.2.4.2 Deserializer Stop Stream SLEEP Feature
            3. 7.3.5.2.4.3 Deserializer 1.8-V or 3.3-V VDDIO Operation
        3. 7.3.5.3 Deserializer Clock-Data Recovery Status Flag (LOCK), Output Enable (OEN), and Output State Select (OSS_SEL)
        4. 7.3.5.4 Deserializer Oscillator Output (Optional)
      6. 7.3.6 Built-In Self Test (BIST)
        1. 7.3.6.1 Sample BIST Sequence
        2. 7.3.6.2 BER Calculations
      7. 7.3.7 Optional Serial Bus Control
    4. 7.4 Device Functional Modes
      1. 7.4.1 Serializer and Deserializer Operating Modes and Reverse Compatibility (CONFIG[1:0])
    5. 7.5 Register Maps
  8. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Display Application
      2. 8.1.2 Live Link Insertion
      3. 8.1.3 Alternate Color or Data Mapping
    2. 8.2 Typical Application
      1. 8.2.1 DS92LV0421 Typical Connection
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
        3. 8.2.1.3 Application Curves
      2. 8.2.2 DS92LV0422 Typical Application
        1. 8.2.2.1 Design Requirements
        2. 8.2.2.2 Detailed Design Procedure
        3. 8.2.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
      1. 10.1.1 WQFN (LLP) Stencil Guidelines
      2. 10.1.2 Transmission Media
      3. 10.1.3 LVDS Interconnect Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Third-Party Products Disclaimer
      2. 11.1.2 Development Support
    2. 11.2 Documentation Support
      1. 11.2.1 Related Documentation
    3. 11.3 Related Links
    4. 11.4 Receiving Notification of Documentation Updates
    5. 11.5 Community Resources
    6. 11.6 Trademarks
    7. 11.7 Electrostatic Discharge Caution
    8. 11.8 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • RHS|48
Thermal pad, mechanical data (Package|Pins)
Orderable Information

8 Application and Implementation

NOTE

Information in the following applications sections is not part of the TI component specification, and TI does not warrant its accuracy or completeness. TI’s customers are responsible for determining suitability of components for their purposes. Customers should validate and test their design implementation to confirm system functionality.

8.1 Application Information

8.1.1 Display Application

The DS92LV042x chipset is intended for interface between a host (graphics processor) and a display. It supports a 24-bit color depth (RGB888) and up to 1024 × 768 display formats. In a RGB888 application, 24 color bits (R[7:0], G[7:0], and B[7:0]), Pixel Clock (PCLK), and three control bits (VS, HS, and DE) are supported across the serial link with RXCLKIN rates from 10 to 75 MHz. The chipset may also be used in 18-bit color applications. In this application, three to six general-purpose signals may also be sent from host to display.

8.1.2 Live Link Insertion

The serializer and deserializer devices support live link or cable hot plug applications. The automatic receiver lock to random data plug and go hot insertion capability allows the DS92LV0422 to attain lock to the active data stream during a live insertion event.

8.1.3 Alternate Color or Data Mapping

Color-mapped data pin names are provided to specify a recommended mapping for 24-bit and 18-bit applications. Seven (7) is assumed to be the MSB, and Zero (0) is assumed to be the LSB. While this is recommended, it is not required. When connecting to earlier generations of FPD-Link II serializer and deserializer devices, a color mapping review is recommended to ensure the correct connectivity is obtained. Table 14 provides examples for interfacing between DS92LV0421 and different deserializers. Table 15 provides examples for interfacing between DS92LV0422 and different serializers.

Table 14. Serializer Alternate Color or Data Mapping

CHANNEL LINK BIT NUMBER RGB (LSB EXAMPLE) DS92LV2422 DS90UR124 DS99R124Q-Q1 DS90C124
RXIN3 Bit 26 B1 B1 N/A N/A N/A
Bit 25 B0 B0
Bit 24 G1 G1
Bit 23 G0 G0
Bit 22 R1 R1
Bit 21 R0 R0
RXIN2 Bit 20 DE DE ROUT20 TXOUT2 ROUT20
Bit 19 VS VS ROUT19 ROUT19
Bit 18 HS HS ROUT18 ROUT18
Bit 17 B7 B7 ROUT17 ROUT17
Bit 16 B6 B6 ROUT16 ROUT16
Bit 15 B5 B5 ROUT15 ROUT15
Bit 14 B4 B4 ROUT14 ROUT14
RXIN1 Bit 13 B3 B3 ROUT13 TXOUT1 ROUT13
Bit 12 B2 B2 ROUT12 ROUT12
Bit 11 G7 G7 ROUT11 ROUT11
Bit 10 G6 G6 ROUT10 ROUT10
Bit 9 G5 G5 ROUT9 ROUT9
Bit 8 G4 G4 ROUT8 ROUT8
Bit 7 G3 G3 ROUT7 ROUT7
RXIN0 Bit 6 G2 G2 ROUT6 TXOUT0 ROUT6
Bit 5 R7 R7 ROUT5 ROUT5
Bit 4 R6 R6 ROUT4 ROUT4
Bit 3 R5 R5 ROUT3 ROUT3
Bit 2 R4 R4 ROUT2 ROUT2
Bit 1 R3 R3 ROUT1 ROUT1
Bit 0 R2 R2 ROUT0 ROUT0
N/A N/A N/A N/A ROUT23(1) OS2(1) ROUT23(1)
ROUT22(1) OS1(1) ROUT22(1)
ROUT21(1) OS0(1) ROUT21(1)
DS92LV0421 SETTINGS MAPSEL = 0 CONFIG[1:0] = 00 CONFIG[1:0] = 10 CONFIG[1:0] = 11
(1) These bits are not supported by the DS92LV0421.

Table 15. Deserializer Alternate Color or Data Mapping

CHANNEL LINK BIT NUMBER RGB (LSB EXAMPLE) DS92LV2421 DS90UR241 DS99R421 DS90C241
TXOUT3 Bit 26 B1 B1 N/A N/A N/A
Bit 25 B0 B0
Bit 24 G1 G1
Bit 23 G0 G0
Bit 22 R1 R1
Bit 21 R0 R0
TXOUT2 Bit 20 DE DE DIN20 RXIN2 DIN20
Bit 19 VS VS DIN19 DIN19
Bit 18 HS HS DIN18 DIN18
Bit 17 B7 B7 DIN17 DIN17
Bit 16 B6 B6 DIN16 DIN16
Bit 15 B5 B5 DIN15 DIN15
Bit 14 B4 B4 DIN14 DIN14
TXOUT1 Bit 13 B3 B3 DIN13 RXIN1 DIN13
Bit 12 B2 B2 DIN12 DIN12
Bit 11 G7 G7 DIN11 DIN11
Bit 10 G6 G6 DIN10 DIN10
Bit 9 G5 G5 DIN9 DIN9
Bit 8 G4 G4 DIN8 DIN8
Bit 7 G3 G3 DIN7 DIN7
TXOUT0 Bit 6 G2 G2 DIN6 RXIN0 DIN6
Bit 5 R7 R7 DIN5 DIN5
Bit 4 R6 R6 DIN4 DIN4
Bit 3 R5 R5 DIN3 DIN3
Bit 2 R4 R4 DIN2 DIN2
Bit 1 R3 R3 DIN1 DIN1
Bit 0 R2 R2 DIN0 DIN0
N/A N/A N/A N/A DIN23(1) OS2(1) DIN23(1)
DIN22(1) OS1(1) DIN22(1)
DIN21(1) OS0(1) DIN21(1)
DS92LV0422 SETTINGS MAPSEL = 0 CONFIG[1:0] = 00 CONFIG[1:0] = 10 CONFIG[1:0] = 11
(1) These bits are not supported by the DS92LV0422.

8.2 Typical Application

8.2.1 DS92LV0421 Typical Connection

Figure 36 shows a typical application of the DS92LV0421 serializer in pin control mode for a 24-bit application. The LVDS inputs require external 100-Ω differential termination resistors. The CML outputs require 0.1-µF, AC-coupling capacitors to the line. The line driver includes internal termination. Bypass capacitors are placed near the power supply pins. At a minimum, four 0.1-µF capacitors and a 4.7-µF capacitor must be used for local device bypassing. Ferrite beads are placed on the power lines for effective noise suppression. System GPO (General Purpose Output) signals control the PDB and BISTEN pins. A delay cap is placed on the PDB signal to delay the enabling of the device until power is stable.

The application assumes connection to the companion deserializer (DS92LV0422), and therefore the configuration pins CONFIG[1:0] are also both tied low. In this example, the cable is long, and therefore the VODSEL pin is tied high and a De-Emphasis value is selected by the resistor R1. The interface to the host is with 1.8-V LVCMOS levels, thus the VDDIO pin is connected also to the 1.8-V rail. The optional serial bus control is not used in this example, thus the SCL, SDA and ID[X] pins can be left open.

DS92LV0421 DS92LV0422 30120944.gif Figure 36. DS92LV0421 Typical Connection Diagram

8.2.1.1 Design Requirements

For this design example, use the parameters listed in Table 16 as the input parameters.

Table 16. Design Parameters

PARAMETER VALUE
VDDIO 1.8 V or 3.3 V
VDDL, VDDP, VDDHS, VDDTX, VDDRX 1.8 V
AC Coupling Capacitor for DOUT± 100 nF

8.2.1.2 Detailed Design Procedure

The DOUT± outputs require 100-nF, AC-coupling capacitors to the line. Channel-Link data input pairs require an external 100-Ω termination for standard LVDS levels. The power supply filter capacitors are placed near the power supply pins. A smaller capacitance capacitor must be placed closer to the power supply pins. Adding a ferrite bead is optional, and if used, TI recommends using a ferrite bead with 1-kΩ impedance and low DC resistance (less than 1 Ω). The VODSEL pin is tied to VDDIO for long cable applications. The de-emphasis pin may connect a resistor to Ground (see Table 2). The PDB and BISTEN pins are assumed to be controlled by a microprocessor. The PDB must remain in a low state until all power supply voltages reach the final voltage. The CONFIG[1:0] pins are set depending on operating modes and backward compatibility (see Table 10). The MAPSEL pin sets the mapping scheme (see Figure 23 and Figure 24). The SCL, SDA, and ID[X] pins can be left open when these serial bus control pins are unused. The RES[7:0] pins and DAP must be tied to Ground.

8.2.1.3 Application Curves

DS92LV0421 DS92LV0422 Ser_65MHz_DOUT_VODSEL_L.gif
Figure 37. Serializer CML Output Stream,
RXCLKIN = 65 MHz, VODSEL = L
DS92LV0421 DS92LV0422 Ser_65MHz_DOUT_VODSEL_H.gif
Figure 38. Serializer CML Output Stream,
RXCLKIN = 65 MHz, VODSEL = H

8.2.2 DS92LV0422 Typical Application

Figure 39 shows a typical application of the DS92LV0422 for a 24-bit application. The CML inputs require 0.1-µF, AC-coupling capacitors to the line, and the receiver provides internal termination. Bypass capacitors are placed near the power supply pins. At a minimum, four 0.1-µF capacitors and a 4.7-µF capacitor must be used for local device bypassing. Ferrite beads are placed on the power lines for effective noise suppression. System GPO (General Purpose Output) signals control the PDB and BISTEN pins. A delay cap is placed on the PDB signal to delay the enabling of the device until power is stable.

The application assumes connection to the companion serializer (DS92LV0421), and therefore the configuration pins CONFIG[1:0] are also both tied low. The interface to the host is with 1.8-V LVCMOS levels, thus the VDDIO pin is connected also to the 1.8-V rail. The optional serial bus control is not used in this example, thus the SCL, SDA, and ID[X] pins can be left open.

DS92LV0421 DS92LV0422 30120974.gif Figure 39. DS92LV0422 Typical Connection Diagram

8.2.2.1 Design Requirements

For this design example, use the parameters listed in Table 17 as the input parameters.

Table 17. Design Parameters

PARAMETER VALUE
VDDIO 1.8 V or 3.3 V
VDDL, VDDP, VDDSC, VDDA 1.8 V
VDDTX 3.3 V
AC Coupling Capacitor for RIN± 100 nF

8.2.2.2 Detailed Design Procedure

The RIN± inputs require 100-nF, AC-coupling capacitors to the line. The power supply filter capacitors are placed near the power supply pins. A smaller capacitance capacitor must be placed closer to the power supply pins. The device has one configuration pin (EQ) called a strap pin, which is pulled down by default. For a high state, use a 10-kΩ resistor pullup to VDDIO. The PDB and BISTEN pins are assumed to be controlled by a microprocessor. The PDB must remain in a low state until all power supply voltages reach the final voltage. The SCL, SDA, and ID[X] pins can be left open when these serial bus control pins are unused. The RES pin and DAP must be tied to Ground.

8.2.2.3 Application Curves

DS92LV0421 DS92LV0422 75MHz_PRBS7_VODSEL_L.gif Figure 40. LVDS Parallel Output Data and Clock,
PRBS-7, TXCLKOUT = 75 MHz, VODSEL = L
DS92LV0421 DS92LV0422 75MHz_PRBS7_VODSEL_H.gif Figure 41. LVDS Parallel Output Data and Clock,
PRBS-7, TXCLKOUT = 75 MHz, VODSEL = H