DS90UR908Q-EVK/NOPB National Semiconductor, DS90UR908Q-EVK/NOPB Datasheet
DS90UR908Q-EVK/NOPB
Specifications of DS90UR908Q-EVK/NOPB
Related parts for DS90UR908Q-EVK/NOPB
DS90UR908Q-EVK/NOPB Summary of contents
Page 1
... With fewer wires to the physical interface of the display, FPD- Link output with LVDS technology is ideal for high speed, low power and low EMI data transfer. The DS90UR908Q is offered in a 48-pin LLP package and is specified over the automotive AEC-Q100 grade 2 tempera- ture range of -40˚C to +105˚C. ...
Page 2
... DS90UR908Q Pin Diagram Pin Descriptions Pin Name Pin # I/O, Type FPD-Link II Input Interface RIN LVDS RIN LVDS CMF 42 I, Analog FPD-Link Output Interface TxOUT[3:0]+ 15,19, 21, O, LVDS 23 TxOUT[3:0]- 16,20, 22, O, LVDS 24 TxCLKOUT LVDS TxCLKOUT LVDS www.national.com Description True input The input must be AC coupled with a 100 nF capacitor. Internal termination. ...
Page 3
Pin Name Pin # I/O, Type LVCMOS Outputs LOCK 27 O, LVMOS Control and Configuration PDB 1 I, LVCMOS w/ pull-down VODSEL 33 I, LVCMOS w/ pull-down OEN 30 I, LVCMOS w/ pull-down OSS_SEL 35 I, LVCMOS w/ pull-down LFMODE ...
Page 4
Pin Name Pin # I/O, Type Optional Serial Bus Control Interface SCL 5 I, LVCMOS SDA 4 I/O, LVCMOS Open Drain ID[ Analog Power and Ground VDDL 6, 31 Power VDDA 38, 43 Power VDDP 8 Power VDDSC ...
Page 5
... LLP, 7.0 X 7.0 X 0.8 mm, 0.5 mm pitch DS90UR908QSQ 48–pin LLP, 7.0 X 7.0 X 0.8 mm, 0.5 mm pitch DS90UR908QSQX 48–pin LLP, 7.0 X 7.0 X 0.8 mm, 0.5 mm pitch Note: Automotive Grade (Q) product incorporates enhanced manufacturing and support processes for the automotive market, including defect detection methodologies. Reliability qualification is compliant with the requirements and temperature grades defined in the AEC Q100 standard ...
Page 6
... 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 (1.8V) DDn Supply Voltage – V (3.3V) DDTX Supply Voltage – V DDIO LVCMOS I/O Voltage −0.3V to +(VDDIO + 0.3V) Receiver Input Voltage LVDS Output Voltage − ...
Page 7
Symbol Parameter V High Level Output Voltage OH V Low Level Output Voltage OL I Output Short Circuit Current OS I TRI-STATE ® Output Current OZ 1.8 V I/O LVCMOS DC SPECIFICATIONS – High Level Input Voltage IH ...
Page 8
Switching Characteristics Over recommended operating supply and temperature ranges unless otherwise specified. Symbol Parameter FPD-Link II Lock Time t DDLT Figure 6 Input Jitter Tolerance t IJIT Figure 9 FPD-Link Output t Low to High Transition Time TLHT t High ...
Page 9
Recommended Timing for the Serial Control Bus Over 3.3V operating supply and temperature ranges unless otherwise specified. Symbol Parameter f SCL Clock Frequency SCL t SCL Low Period LOW t SCL High Period HIGH t Hold time for a start ...
Page 10
Note 1: “Absolute Maximum Ratings” indicate limits beyond which damage to the device may occur, including inoperability and degradation of device reliability and/or performance. Functional operation of the device and/or non-degradation at the Absolute Maximum Ratings or other conditions beyond ...
Page 11
FIGURE 4. FPD-Link & LVCMOS Powerdown Delay FIGURE 5. FPD-Link Outputs Enable Delay FIGURE 6. PLL Lock Times 11 30105188 30105189 30105114 www.national.com ...
Page 12
FIGURE 7. FPD-Link (LVDS) Single-ended and Differential Waveforms www.national.com FIGURE 8. FPD-Link Transmitter Pulse Positions FIGURE 9. Receiver Input Jitter Tolerance 12 30105106 30105117 30105116 ...
Page 13
FIGURE 10. BIST PASS Waveform FIGURE 11. Serial Control Bus Timing Diagram 13 30105190 30105136 www.national.com ...
Page 14
... HS, VS and DE video control signals and up to three over-sampled low-speed (general purpose) data bits. DATA TRANSFER The DS90UR908Q will receive a pixel of data in the following format: C1 and C0 represent the embedded clock in the serial stream always HIGH and C0 is always LOW. b[23:0] contain the scrambled data ...
Page 15
... Glitches of a control signal can cause FIGURE 13. Video Control Signal Filter Wavefrom COLOR BIT MAPPING SELECT The DS90UR908Q can be configured to accept 24-bit color (8-bit RGB) with 2 different mapping schemes: LSBs on Tx- FIGURE 14. 8–bit FPD-LInk Mapping: LSB's on TxOUT3 a visual display error ...
Page 16
... L H POWER SAVING FEATURES PowerDown Feature (PDB) The DS90UR908Q has a PDB input pin to ENABLE or POW- ER DOWN the device. This pin can be controlled by the system to save power, disabling the Des when the display is not needed. An auto detect mode is also available. In this mode, the PDB pin is tied High and the Des will enter POWER DOWN when the serial stream stops ...
Page 17
INPUTS PDB OEN OSS_SEL LVCMOS 1.8V / 3.3V VDDIO Operation The LVCMOS outputs can operate with 1 3.3 V levels (V ) for target (Display) compatibility. ...
Page 18
... H ±1.7 OSCILLATOR OUTPUT — OPTIONAL The DS90UR908Q provides an optional TxCLKOUT when the input clock (serial stream) has been lost. This is based on an internal oscillator. The frequency of the oscillator may be selected. This feature may be controlled by the external pin and the register. See Tables 3, ...
Page 19
... DCB code) the RGB and control signal outputs are shut off. Step 2: Place the DS90UR908Q in BIST mode by setting the BISTEN = H. The Device is now in the BIST mode and checks the incoming serial payloads for errors error in the pay- load (1 to 24) is detected, the PASS pin will switch low for one half of the clock period ...
Page 20
FIGURE 19. BIST Waveforms 20 30105164 ...
Page 21
... Serial Bus Control — Optional The DS90UR908Q may also be configured by the use of a serial control bus that is I2C protocol compatible. By default, the I2C reg_0x00'h is set to 00'h and all configuration is set by control/strap pins. A write of 01'h to reg_0x00'h will enable/ allow configuration by registers; this will override the control/ strap pins ...
Page 22
ADD ADD Register Name Bit(s) (dec) (hex Des Config 1 3 Slave ID 6:0 www.national.com FIGURE 22. Serial Control Bus — READ FIGURE 23. Serial Control Bus — WRITE TABLE 8. Serial Bus Control Registers R/W ...
Page 23
ADD ADD Register Name Bit(s) (dec) (hex Des Features 5 Des Features 2 7 2:0 R/W Defa Function Description ult (bin) R/W 0 OEN Output Enable Input Table 3 ...
Page 24
... Applications Information DISPLAY APPLICATION The DS90UR908Q, in conjunction with the DS90UR907Q or DS90UR905Q, is intended for interfacing between a host (graphics processor) and a Display. It supports an 24-bit color depth (RGB888) and up to 1024 X 768 display formats RGB888 application, 24 color bits (R[7:0], G[7:0], B[7:0]), Pix- el Clock (PCLK) and three control bits (VS, HS and DE) are supported across the serial link with PCLK rates from MHz ...
Page 25
... LIVE LINK INSERTION The serializer and deserializer devices support live pluggable applications. The automatic receiver lock to random data “plug & go” hot insertion capability allows the DS90UR908Q to attain lock to the active data stream during a live insertion rail which would then event. ...
Page 26
PCB LAYOUT AND POWER SYSTEM CONSIDERATIONS Circuit board layout and stack-up for the LVDS devices should be designed to provide low-noise power feed to the device. Good layout practice will also separate high frequency or high-level inputs and outputs to ...
Page 27
Revision History • 03/30/2010 — Initial Release • 07/26/2010 — Update all final AC and DC parameter limits • 08/09/2010 — Update Pin Description of VODSEL 27 www.national.com ...
Page 28
Physical Dimensions 48–pin LLP Package (7 7 0.8 mm, 0.5 mm pitch) www.national.com inches (millimeters) unless otherwise noted NS Package Number SQA48A 28 ...
Page 29
Notes 29 www.national.com ...
Page 30
... For more National Semiconductor product information and proven design tools, visit the following Web sites at: www.national.com Products Amplifiers www.national.com/amplifiers Audio www.national.com/audio Clock and Timing www.national.com/timing Data Converters www.national.com/adc Interface www.national.com/interface LVDS www.national.com/lvds Power Management www.national.com/power Switching Regulators www.national.com/switchers LDOs www.national.com/ldo LED Lighting www ...