DS92LX2122SQE National Semiconductor, DS92LX2122SQE Datasheet

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DS92LX2122SQE

Manufacturer Part Number
DS92LX2122SQE
Description
SERDES, 10-50MHZ, 48LLP
Manufacturer
National Semiconductor
Datasheet

Specifications of DS92LX2122SQE

Data Rate
1.05Gbps
No. Of Inputs
1
No. Of Outputs
21
Supply Voltage Range
1.71V To 1.89V
Driver Case Style
LLP
No. Of Pins
48
Base Number
2122
Operating Temperature Range
-40°C To +85°C
Serdes Function
Deserializer
Ic Input Type
LVCMOS
Ic Output Type
LVCMOS
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
DS92LX2122SQE/NOPB
Manufacturer:
TI/德州仪器
Quantity:
20 000
© 2011 National Semiconductor Corporation
10 - 50 MHz DC-Balanced Channel Link III Bi-Directional
Control Serializer and Deserializer
General Description
The DS92LX2121/DS92LX2122 chipset offers a Channel
Link III interface with a high-speed forward channel and a full-
duplex control channel for data transmission over a single
differential pair. The DS92LX2121/DS92LX2122 incorpo-
rates differential signaling on both the high-speed and bi-
directional back channel control data paths. The Serializer/
Deserializer pair is targeted for direct connections between
graphics host controller and displays modules. This chipset is
ideally suited for driving video data to displays requiring 18-
bit color depth (RGB666 + HS, VS, and DE) along with a bi-
directional back channel control bus. The primary transport
converts 21 bit data over a single high-speed serial stream,
along with a separate low latency bi-directional back channel
transport that accepts control information from an I2C port.
Using National’s embedded clock technology allows trans-
parent full-duplex communication over a single differential
pair, carrying asymmetrical bi-directional back channel con-
trol information in both directions. This single serial stream
simplifies transferring a wide data bus over PCB traces and
cable by eliminating the skew problems between parallel data
and clock paths. This significantly saves system cost by nar-
rowing data paths that in turn cable width, connector size and
pins.
In addition, the Deserializer provides input equalization to
compensate for loss from the media over longer distances.
Internal DC balanced encoding/decoding is used to support
AC-Coupled interconnects.
A sleep function provides a power-savings mode when the
high speed forward channel and embedded bi-directional
control channel are not needed.
The Serializer is offered in a 40-pin lead in LLP and Deseri-
alizer is offered in a 48-pin LLP packages.
Typical Application Diagram
TRI-STATE® is a registered trademark of National Semiconductor Corporation.
DS92LX2121 / DS92LX2122
301251
Features
DESERIALIZER — DS92LX2122
Applications
Up to 1050 Mbits/sec data throughput
10 MHz to 50 MHz input clock support
Supports 18-bit color depth (RGB666 + HS, VS, DE)
Embedded clock with DC Balanced coding to support AC-
coupled interconnects
Capable to drive up to 10 meters shielded twisted-pair
Bi-directional control interface channel with I
I
addressing
Up to 4 GPI on DES and GPO on SER
AT-SPEED BIST diagnosis feature to validate link integrity
Individual power-down controls for both SER and DES
User-selectable clock edge for parallel data on both SER
and DES
Integrated termination resistors
1.8V- or 3.3V-compatible parallel bus interface
Single power supply at 1.8V
IEC 61000–4–2 ESD compliant
Temperature range −40°C to +85°C
No reference clock required on Deserializer
Programmable Receive Equalization
LOCK output reporting pin to ensure
EMI/EMC Mitigation
Programmable Spread Spectrum (SSCG) outputs
Receiver Output Drive Strength control (RDS)
Receiver staggered outputs
Industrial Displays, Touch Screens
Medical Imaging
2
C interface for device configuration. Single-pin ID
January 14, 2011
www.national.com
2
C support
30125127

Related parts for DS92LX2122SQE

DS92LX2122SQE Summary of contents

Page 1

... The Serializer is offered in a 40-pin lead in LLP and Deseri- alizer is offered in a 48-pin LLP packages. Typical Application Diagram TRI-STATE® registered trademark of National Semiconductor Corporation. © 2011 National Semiconductor Corporation DS92LX2121 / DS92LX2122 Features ■ ...

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Block Diagrams www.national.com FIGURE 1. Block Diagram FIGURE 2. Application Block Diagram 2 30125128 30125129 ...

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... LLP, 6.0 X 6.0 X 0.8 mm, 0.5 mm pitch DS92LX2121SQ 40-pin LLP, 6.0 X 6.0 X 0.8 mm, 0.5 mm pitch DS92LX2121SQX 40-pin LLP, 6.0 X 6.0 X 0.8 mm, 0.5 mm pitch DS92LX2122SQE 48-pin LLP, 7.0 X 7.0 X 0.8 mm, 0.5 mm pitch DS92LX2122SQ 48-pin LLP, 7.0 X 7.0 X 0.8 mm, 0.5 mm pitch DS92LX2122SQX 48-pin LLP, 7.0 X 7.0 X 0.8 mm, 0.5 mm pitch DS92LX2121 Pin Diagram Serializer - DS92LX2121 — ...

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DS92LX2121 Serializer Pin Descriptions Pin Name Pin No. LVCMOS PARALLEL INTERFACE DIN[20: 40, Inputs, LVCMOS w/ 39, 38, 37, 36, 35, 33, 32, 30, 29, 28, 27, 26, 25, 24, 23 PCLK 6 Input, LVCMOS ...

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DS92LX2122 Pin Diagram Deserializer - DS92LX2122 — Top View 5 30125120 www.national.com ...

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DS92LX2122 Deserializer Pin Descriptions Pin Name Pin No. LVCMOS PARALLEL INTERFACE ROUT[20: 10, 11, Outputs, LVCMOS 12, 13, 14, 15, 16, 18, 19, 21, 22, 23, 24, 25, 26, 27, 28 PCLK 4 Output, LVCMOS General ...

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Pin Name Pin No. RIN+ 41 Input/Output, CML RIN- 42 Input/Output, CML POWER AND GROUND VDDSSCG 3 Digital Power VDDOR1/2/3 29, 20, 7 Digital Power VDDD 17 Digital Power VDDR 36 Analog Power VDDCML 40 Analog Power VDDPLL 45 Analog ...

Page 8

... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage ( V ) DD1V8 Supply Voltage (V ) DD3V3 LVCMOS Input Voltage (V ) −0.3V to +(V DD1V8 LVCMOS Input Voltage (V ) −0.3V to +(V DD3V3 LVCMOS Output Voltage (V ...

Page 9

Symbol Parameter I Output Short Circuit Current OS I TRI-STATE® Output Current RPWDNB = 0V, OZ CML DRIVER DC SPECIFICATIONS (DOUT+, DOUT Output Differential Voltage OD Output Differential Voltage ΔV OD Unbalance Output Differential Offset V OS Voltage ...

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Symbol Parameter Deserializer (Rx) I VDDn Supply Current DDR (includes load current) I Deserializer (Rx) DDIOR VDDIO Supply Current (includes load current) I Deserializer (Rx) Supply DDRZ Current Power-down I DDIORZ Recommended Serializer Timing for PCLK Over recommended operating supply ...

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Symbol Parameter Peak-to-peak Serializer t JINT Output Jitter Serializer Jitter Transfer λ STXBW Function -3 dB Bandwidth Serializer Jitter Transfer δ STX Function (Peaking Serializer Jitter Transfer δ Function (Peaking STXf Frequency) Deserializer Switching Characteristics Over recommended operating supply and ...

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Bi-Directional Control Bus AC Timing Specifications (SCL, SDA Compliant (Figure 3) Over recommended operating supply and temperature ranges unless otherwise specified. Symbol Parameter RECOMMENDED INPUT TIMING REQUIREMENTS () f SCL Clock Frequency SCL f SCL Low Period LOW ...

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Bi-Directional Control Bus DC Characteristics (SCL, SDA Symbol Parameter V Input High Level IH V Input Low Level Voltage IL V Input Hysteresis HY I TRI-STATE® Output OZ Current I Input Current IN C Input Pin Capacitance IN ...

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AC Timing Diagrams and Test Circuits FIGURE 5. Serializer CML Output Load and Transition Times www.national.com FIGURE 4. “Worst Case” Test Pattern 14 30125152 30125146 30125147 ...

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FIGURE 6. Serializer VOD DC Diagram FIGURE 7. Low-Voltage Differential VTH/VTL Definition Diagram FIGURE 8. Serializer Input Clock Transition Times 15 30125148 30125130 30125116 www.national.com 30125134 ...

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FIGURE 9. Serializer Setup/Hold Times FIGURE 10. Serializer Data Lock Time FIGURE 11. Serializer Delay FIGURE 12. Deserializer Data Lock Time 16 30125149 30125132 30125150 30125113 ...

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FIGURE 13. Deserializer LVCMOS Output Load and Transition Times FIGURE 14. Deserializer Delay FIGURE 15. Deserializer Output Setup/Hold Times FIGURE 16. Spread Spectrum Clock Output Profile 17 30125114 30125111 30125131 30125135 www.national.com ...

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FIGURE 17. Typical Serializer Jitter Transfer Function Curve at 43 MHz FIGURE 18. Typical Deserializer Input Jitter Tolerance Curve at 43 MHz www.national.com 30125162 30125159 18 ...

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TABLE 1. DS92LX2121 Control Registers Addr Name Bits Field (Hex) 7:1 DEVICE Device SER ID 7:3 RESERVED 2 STANDBY 1 Reset DIGITAL 1 RESET0 0 DIGITAL RESET1 2 Reserved 7:0 RESERVED Reserved 7:6 ...

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Addr Name Bits Field (Hex) B Reserved 7:0 RESERVED Reserved 7:3 RESERVED PCLK Detect 2 PCLK DETECT C Reserved 1 RESERVED Cable Link 0 LINK DETECT Detect Status D Reserved 7:0 RESERVED E Reserved 7:0 RESERVED F Reserved 7:0 RESERVED ...

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TABLE 2. DS92LX2122 Control Registers Addr Name Bits (Hex) 7:1 DEVICE Device DES ID 7:3 RESERVED 2 REM_WAKEUP 1 Reset 1 DIGITALRESET0 0 DIGITALRESET1 Reserved 7:6 RESERVED Auto Clock 5 AUTO_CLOCK OSS Select ...

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Addr Name Bits (Hex) Reserved 7:6 RESERVED VDDIO VDDIO Control 5 CONTROL VDDIO Mode 4 VDDIO MODE Pass-Through 3 THROUGH Auto ACK 2 AUTO ACK Reserved 1 RESERVED RRFB 0 RRFB 4 EQ Control ...

Page 23

Addr Name Bits (Hex) 7:1 SER DEV ID 7 SER ID 0 RESERVED ID[0] Index 7:1 ID[0] INDEX 8 0 RESERVED 7:1 ID[1] INDEX 9 ID[1] Index 0 RESERVED 7:1 ID[2] INDEX A ID[2] Index 0 RESERVED 7:1 ID[3] INDEX ...

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Addr Name Bits (Hex) 22 Reserved 7:0 RESERVED GPCR[7] GPCR[6] GPCR[5] General Purpose GPCR[4] 23 7:00 Control Reg GPCR[3] GPCR[2] GPCR[1] GPCR[0] Reserved 7:1 RESERVED BIST 0 BIST_EN 24 25 BIST_ERR 7:0 BIST_ERR REM_WAKEUP_ 7:6 Remote Wake EN 26 Enable ...

Page 25

Functional Description The DS92LX2121 / DS92LX2122 Channel Link III chipset is intended for camera applications. The Serializer/ Deserializer chipset operates from a 10 MHz to 50 MHz pixel clock fre- quency. The DS92LX2121 transforms a 21-bit wide parallel LVCMOS data ...

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FIGURE 20. Write Byte FIGURE 21. Read Byte FIGURE 22. Basic Operation FIGURE 23. START and STOP Conditions 26 30125160 30125110 30125141 30125142 ...

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SLAVE CLOCK STRETCHING In order to communicate and synchronize with remote de- vices on the bus through the bi-directional control channel, slave clock stretching must be supported by the I controller/host device. The chipset utilizes bus clock ...

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CAMERA MODE OPERATION In Camera mode transactions originate from the Deseri- alizer from the host controller. The I Deserializer will detect if a transaction is intended for the Se- rializer or a slave at the Serializer. Commands ...

Page 29

GENERAL PURPOSE I/O (GPIO) The DS92LX2121 / DS92LX2122 has GPO and 4 GPI on the Serializer and Deserializer respectively. The GPI/GPO maximum switching rate kHz for communication between Deserializer GPI to Serializer GPO. ...

Page 30

Step 1: Place the Deserializer in BIST Mode. Serializer and Deserializer power supply must be supplied. Set the Serializer M/S pin to LOW and the Deserializer M/S pin to HIGH. Enable the AT SPEED BIST mode on the De- Freq ...

Page 31

Step 3: Stop at SPEED BIST by turning off BIST mode in the Deserializer to determine Pass/Fail. To end BIST, the system must pull BISTEN pin of the Dese- rializer LOW. The BIST duration is fully defined by the BIS- ...

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LOCK pin and confirm LOCK = H before performing any I communication across the link. For Remote Wakeup to function properly: • The chipset needs to be configured in Camera mode: Serializer M and Deserializer M ...

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Applications Information AC COUPLING The SER/DES supports only AC-coupled interconnects through an integrated DC balanced decoding scheme. Exter- For high-speed Channel Link III transmissions, the smallest available package should be used for the AC coupling ca- pacitor. This will help ...

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FIGURE 31. DS92LX2121 Typical Connection Diagram 34 30125155 ...

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Figure 32 shows a typical connection of the DS92LX2122 Deserializer. FIGURE 32. DS92LX2122 Typical Connection Diagram 35 30125156 www.national.com ...

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TRANSMISSION MEDIA The Ser/Des chipset is intended to be used over a wide variety of balanced cables depending on distance and signal quality requirements. The Ser/Des employ internal termination pro- viding a clean signaling environment. The interconnect for Channel Link ...

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Physical Dimensions inches (millimeters) unless otherwise noted DS92LX2121 Serializer NS Package Number SQA40A DS92LX2122 Deserializer NS Package Number SQA48A 37 www.national.com ...

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