DS90C387RVJD NSC [National Semiconductor], DS90C387RVJD Datasheet

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DS90C387RVJD

Manufacturer Part Number
DS90C387RVJD
Description
85MHz Dual 12-Bit Double Pumped Input LDI Transmitter - VGA/UXGA
Manufacturer
NSC [National Semiconductor]
Datasheet

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© 2003 National Semiconductor Corporation
DS90C387R
85MHz Dual 12-Bit Double Pumped Input LDI Transmitter
- VGA/UXGA
General Description
The DS90C387R transmitter is designed to support pixel
data transmission from a Host to a Flat Panel Display up to
UXGA resolution. It is designed to be compatible with Graph-
ics Memory Controller Hub( GMCH) by implementing two
data per clock and can be controlled by a two-wire serial
communication interface. Two input modes are supported:
one port of 12-bit( two data per clock) input for 24-bit RGB,
and two ports of 12-bit( two data per clock) input for dual
24-bit RGB( 48-bit total). In both modes, input data will be
clocked on both rising and falling edges in LVTTL level
operation, or clocked on the cross over of differential clock
signals in the low swing operation. Each input data width will
be 1/2 of clock cycle. With an input clock at 85MHz and input
data at 170Mbps, the maximum transmission rate of each
LVDS line is 595Mbps, for a aggregate throughput rate of
2.38Gbps/4.76Gbps. It converts 24/48 bits (Single/Dual
Pixel 24-bit color) of data into 4/8 LVDS (Low Voltage Differ-
ential Signaling) data streams. DS90C387R can be pro-
grammed via the two-wire serial communication interface.
The LVDS output pin-out is identical to DS90C387. Thus,
this transmitter can be paired up with DS90CF388, receiver
of the 112MHz LDI chipset or FPD-Link Receivers in non-DC
Balance mode operation which provides GUI/LCD panel/
mother board vendors a wide choice of inter-operation with
LVDS based TFT panels.
DS90C387R also comes with features that can be found on
DS90C387. Cable drive is enhanced with a user selectable
pre-emphasis feature that provides additional output current
during transitions to counteract cable loading effects. DC
Balancing on a cycle-to-cycle basis is also provided to re-
duce ISI( Inter-Symbol Interference), control signals (
VSYNC, HSYNC, DE) are sent during blanking intervals.
With pre-emphasis and DC Balancing, a low distortion eye-
pattern is provided at the receiver end of the cable. These
enhancements allow cables 5 to 15+ meters in length to be
driven depending on media characteristic and pixel clock
speed. Pre-emphasis is available in both the DC Balanced
TRI-STATE
®
is a registered trademark of National Semiconductor Corporation.
DS101288
and Non-DC Balanced modes. In the Non-DC Balanced
mode backward compatibility with FPD-Link Receivers is
obtained.
This chip is an ideal solution to solve EMI and cable size
problems for high-resolution flat panel display applications. It
provides a reliable industry standard interface based on
LVDS technology that delivers the bandwidth needed for
high-resolution panels while maximizing bit times, and keep-
ing clock rates low to reduce EMI and shielding require-
ments. For more details, please refer to the “Applications
Information” section of this datasheet.
Features
n Complies with Open LDI specification for digital display
n 25 to 85MHz clock support
n Supports VGA through UXGA panel resolution
n Up to 4.76Gbps bandwidth in dual 24-bit RGB in-to-dual
n Dual 12-bit Double Pumped Input DVO port.
n Pre-emphasis reduces cable loading effects.
n Drives long, low cost cables
n DC Balance data transmission provided by transmitter
n Transmitter rejects cycle-to-cycle jitter.(+/− 2ns of input
n Support both LVTTL and low voltage level input(capable
n Two-wire serial communication interface up to 400 KHz
n Programmable input clock and control strobe select
n Backward compatible configuration with 112MHz LDI
n Optional second LVDS clock for backward compatibility
n Compatible with TIA/EIA-644
interfaces
pixel out application.
reduces ISI distortion
bit period)
of 1.0 to 1.8V)
and FPD-Link.
w/ FPD-Link Receivers
December 2003
www.national.com

Related parts for DS90C387RVJD

DS90C387RVJD Summary of contents

Page 1

DS90C387R 85MHz Dual 12-Bit Double Pumped Input LDI Transmitter - VGA/UXGA General Description The DS90C387R transmitter is designed to support pixel data transmission from a Host to a Flat Panel Display up to UXGA resolution designed to be ...

Page 2

Mode Configuration / PerformanceTable Mode Mode (GUI Out/Cable) Input Clock Rate (MHz) Input Data Rate (Mbps) LVDS data Pairs Out Ouput Clock Rate (MHz) Data Rate Out (Mbps) per LVDS channel Throughput Data Rate Out Generalized Block Diagrams www.national.com one ...

Page 3

Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage ( LVCMOS/LVTTL Output Voltage −0. LVDS Driver Output Voltage −0. LVDS ...

Page 4

Electrical Characteristics Over recommended operating supply and temperature ranges unless otherwise specified.(Note 2) Symbol Parameter TRANSMITTER SUPPLY CURRENT ICCTW Transmitter Supply Current Worst Case ICCTG Transmitter Supply Current 16 Grayscale Case ICCTZ Transmitter Supply Current Power Down Note 1: “Absolute ...

Page 5

Recommended Transmitter Input Characteristics Over recommended operating supply and temperature ranges unless otherwise specified. Device driving the transmitter inputs should comply to this table of recommendations. Symbol TCIT TxCLK IN Transition Time (Figure 5) TCIP TxCLK IN Period (Figure 6) ...

Page 6

Transmitter Switching Characteristics Note 5: The limits are based on bench characterization of the device’s jitter response over the power supply voltage range. Output clock jitter is measured with a ± cycle-to-cycle jitter of 2ns applied to the input clock ...

Page 7

AC Timing Diagrams (Continued) FIGURE 2. “16 Grayscale” Test Pattern (Note 11) Note 10: The worst case test pattern produces a maximum toggling of digital circuits, LVDS I/O and CMOS/TTL I/O. Note 11: The 16 grayscale test pattern tests device ...

Page 8

AC Timing Diagrams FIGURE 4. DS90C387R LVDS Output Load and Transition Times FIGURE 6. DS90C387R TxCLK IN Period, and High/Low Time (Falling Edge Strobe) FIGURE 7. DS90C387R Setup/Hold (Falling Edge Strobe First) www.national.com (Continued) FIGURE 3. “Worst Case” Test Pattern ...

Page 9

AC Timing Diagrams (Continued) FIGURE 8. DS90C387R Phase Lock Loop Set Time FIGURE 10. DS90C387R Input to Output Latency(Note 9) FIGURE 9. DS90C387R Power Down Delay 9 10128819 10128821 10128837 www.national.com ...

Page 10

AC Timing Diagrams C — Setup and Hold Time (Internal data sampling window) defined by Rspos (receiver input strobe position) min and max Tppos — Transmitter output pulse position (min and max) RSKM = Cable Skew (type, length) + Source ...

Page 11

DS90C387R Pin Description—LDI Transmitter Pin Name I/O No. D0-D23 HSYNC I 1 VSYNC I 1 AnP O 8 AnM O 8 CLKINP I 1 CLKINM I 1 R_FB I 1 R_FDE I 1 CLK1P O ...

Page 12

DS90C387R Pin Description—LDI Transmitter Pin Name I/O PLLV I CC PLLGND I LVDSV I CC LVDSGND I CLK2P/NC O CLK2M/ REF I2CSEL I DDREN/I2Cclk I DSEL/I2Cdat I MSEN O TST1 TST2 ...

Page 13

DS90C387R Pin Description—LDI Transmitter TABLE 1. Control Settings for mode selection (Continued) Mode CLKIN,single-ended/ differentail Description (Continued) 12bit Two 12-bit DSEL DSEL 12-bit in, 24-bit pixel out, Two 12-bit in, two 24-bit non-DC Balanced or pixels out, non-DC DC-Balanced Balanced ...

Page 14

DS90C387R Pin Description—LDI Transmitter TABLE 2. Relationship between R_FB, DE, HSYNC and VSYNC pins R_FB Primary Edge VCC Falling GND Rising Two-Wire Serial Communication Interface Description The DS90C387R operates as a slave on the Serial Bus, so the SCL line ...

Page 15

Two-Wire Serial Communication Interface Description TABLE 4. Register Field Definitions(’ * " = features not implemented on DS90C387R) Field Access VND_IDL RO Vendor ID low byte, value is 05h. VND_IDH RO Vendor ID high byte, value is 13h. DEV_IDL RO ...

Page 16

Two-Wire Serial Communication Interface Description TABLE 4. Register Field Definitions(’ * " = features not implemented on DS90C387R) (Continued) Field Access *VDJK [7:0] RW *DK [3:1] RW *DKEN RW Communicating with the DS90C387R through Registers There are 31 data registers ...

Page 17

Two-Wire Serial Communication Interface for Slave (Continued) The master must generate a “ Start ”, by sending the 7-bit slave address plus a 0 and wait for acknowledge from DS90C387R. When DS90C387R acknowledges (the 1st LVDS Interface ...

Page 18

LVDS Interface (Continued) TABLE 7. Two 12-bit (two data per clock) data mapping (DUAL=Vcc, BAL=Vcc/GND, A0-A7 are used). VGA - TFT Data Transmitter input pin names Signals Color Bits 24-bit LSB MSB R7 ...

Page 19

LVDS Interface (Continued) TABLE 7. Two 12-bit (two data per clock) data mapping (DUAL=Vcc, BAL=Vcc/GND, A0-A7 are used). (Continued) VGA - TFT Data Transmitter input pin names Signals Color Bits MSB B7 Note 16: The lower half ...

Page 20

LVDS Interface (Continued) TABLE 8. 12-bit (two data per clock) input application data mapping with GMCH. P0L Pin Name Low D11 G0[3] D10 G0[2] D9 G0[1] D8 G0[0] D7 B0[7] D6 B0[6] D5 B0[5] D4 B0[4] D3 B0[3] D2 B0[2] ...

Page 21

LVDS Interface (Continued) FIGURE 17. TTL Data Inputs Mapped to LVDS Outputs Non-DC Balanced Mode (Backward Compatible, BAL=Low for Port1 for Port2) 21 10128826 www.national.com ...

Page 22

LVDS Interface (Continued) FIGURE 18. 48 Parallel TTL Data Inputs Mapped to LVDS Outputs DC Balanced Mode (Data Enabled, BAL=High for Port1 for Port2) www.national.com 22 10128804 ...

Page 23

LVDS Interface (Continued) FIGURE 19. Control Signals Transmitted During Blanking in DC-Balance mode TABLE 9. Control Signals Transmitted During Blanking in DC-Balance mode Control Signal Signal Level DE HIGH LOW HSYNC HIGH LOW VSYNC HIGH LOW Note 22: The control ...

Page 24

Applications Information How to configure the DS90C387R to work with DS90CF384/DS90CF384A/DS90CF386 or DS90CF388 for most common application configure for single pixel application using the DS90C387R to interface with GMCH host, please see table below for reference pin connection ...

Page 25

Applications Information integrated LVDS transmitter without DC balance data trans- mission. In this case, the receivers “BAL” pin must be tied low (DC balance disabled). Features Description: 1. Pre-emphasis: adds extra current during LVDS logic transition to reduce the cable ...

Page 26

Applications Information feature supports backward compatibility with the previous generation of devices - the second clock allows the transmit- ter to interface to panels using a ’dual pixel’ configuration of two 24-bit or 18-bit ’notebook’ receivers. Pre-emphasis feature is available ...

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Pin Diagram Transmitter-DS90C387R 27 10128806 www.national.com ...

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... National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications. inches (millimeters) Dimensions show in millimeters Order Number DS90C387RVJD NS Package Number VJD100A 2. A critical component is any component of a life ...

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