LMH0030VS

LMH0030 SMPTE 292M/259M Digital Video Serializer with Video and Ancillary Data FIFOs and Integrated Cable Driver August 2006 LMH0030 SMPTE 292M/259M Digital Video Serializer with Video and Ancillary Data FIFOs and Integrated Cable Driver General Description The LMH0030 SMPTE 292M/259M Digital Video Serializer with Ancillary Data FIFO and Integrated Cable Driver is a monolithic integrated circuit that encodes, serializes and transmits bit-parallel digital video data conforming to SMPTE 125M and 267M standard definition, 10-bit wide component video and SMPTE 260M, 274M, 295M and 296M highdefinition, 20-bit wide component video standards. The LMH0030 operates at SMPTE 259M serial data rates of 270 Mbps, 360 Mbps, the SMPTE 344M serial data rate of 540 Mbps, and the SMPTE 292M serial data rates of 1483.5 and 1.485 Gbps. The serial data clock frequency is internally generated and requires no external frequency setting, trimming or filtering components. The LMH0030 performs functions which include: parallel-toserial data conversion, SMPTE standard data encoding, NRZ to NRZI data format conversion, serial data clock generation and encoding with the serial data, automatic video rate and format detection, ancillary data packet management and insertion, and serial data output driving. The LMH0030 has circuitry for automatic EDH/CRC character and flag generation and insertion per SMPTE RP-165 (standard definition) or SMPTE 292M (high definition). Optional LSB dithering is implemented which prevents pathological pattern generation. Unique to the LMH0030 are its video and ancillary data FIFOs. The video FIFO allows the video data to be delayed from 0 to 4 parallel data clock periods for video timing purposes. The ancillary data port and on-chip FIFO and control circuitry store and insert ancillary flags, data packets and checksums into the ancillary data space. The LMH0030 also has an exclusive built-in self-test (BIST) and video test pattern generator (TPG) with SD and HD component video test patterns: reference black, PLL and EQ pathologicals and color bars in 4:3 and 16:9 raster formats for NTSC and PAL standards*. The color bar patterns feature optional bandwidth limiting coding in the chroma and luma transitions. The LMH0030 has a unique multi-function I/O port for immediate access to control and configuration settings. This port may be programmed to provide external access to control functions and indicators as inputs and outputs. The designer can thus customize the LMH0030 to fit the desired application. At power-up or after a reset command, the LMH0030 is auto-configured to a default operating condition. Separate power pins for the output driver, PLL and the serializer improve power supply rejection, output jitter and noise performance. The LMH0030’s internal circuitry is powered from +2.5V and the I/O circuitry from a +3.3V supply. Power dissipation is typically 430mW at 1.485 Gbps including two 75Ω ACcoupled and back-matched output loads. The device is packaged in a 64-pin TQFP. Features n SDTV/HDTV serial digital video standard compliant n Supports 270 Mbps, 360 Mbps, 540 Mbps, 1.4835Gbps and 1.485 Gbps SDV data rates with auto-detection n Low output jitter: 125ps max, 85ps typical n Low power: typically 430mW n No external serial data rate setting or VCO filtering components required* n Fast PLL lock time: < 150µs typical at 1.485 Gbps n Adjustable depth video FIFO for timing alignment n Built-in self-test (BIST) and video test pattern generator (TPG)* n Automatic EDH/CRC word and flag generation and insertion n On-chip ancillary data FIFO and insertion control circuitry n Flexible control and configuration I/O port n LVCMOS compatible data and control inputs and outputs n 75Ω ECL-compatible, differential, serial cable-driver outputs n 3.3V I/O power supply and 2.5V logic power supply operation n 64-pin TQFP package * Patent applications made or pending. Applications n SDTV/HDTV parallel-to-serial digital video interfaces for: — Video cameras — VTRs — Telecines — Digital video routers and switchers — Digital video processing and editing equipment — Video test pattern generators and digital video test equipment — Video signal generators Order Number LMH0030VS 64-Pin TQFP NS Package Number VEC-64A © 2006 National Semiconductor Corporation DS201803 www.national.com LMH0030 Typical Application 20180301 www.national.com 2 LMH0030 Block Diagram 20180302 3 www.national.com LMH0030 Connection Diagram 20180303 64-Pin TQFP Order Number LMH0030VS See NS Package Number VEC-64A www.national.com 4 LMH0030 Absolute Maximum Ratings (Note 1) It is anticipated that this device will not be offered in a military qualified version. If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office / Distributors for availability and specifications. CMOS I/O Supply Voltage (VDDIO–VSSIO): SDO Supply Voltage (VDDSD–VSSSD): Digital Logic Supply Voltage (VDDD–VSSD): PLL Digital Supply Voltage (VDDPLL–VSSPLL): PLL Analog Supply Voltage (VDDPLLA–VSSPLLA), (VDDZ −VSSD ) : CMOS Input Voltage (Vi): 4.0V 4.0V 3.0V 3.0V 3.0V VSSIO −0.15V to VDDIO +0.15V CMOS Output Voltage (Vo): CMOS Input Current (single input): Vi = VSSIO −0.15V: Vi = VDDIO +0.15V: CMOS Output Source/Sink Current: SDO Output Sink Current: Package Thermal Resistance θJA @ 0 LFM Airflow θJA @ 500 LFM Airflow θJC Storage Temp. Range: Junction Temperature: Lead Temperature (Soldering 4 Sec): ESD Rating (HBM): ESD Rating (MM): VSSIO −0.15V to VDDIO +0.15V −5 mA +5 mA ± 10 mA 40 mA 47˚C/W 27˚C/W 6.5˚C/W −65˚C to +150˚C +150˚C +260˚C 2 kV 250V Recommended Operating Conditions Symbol VDDIO VDDSD VDDD VDDPLL VDDZ VIL VIH TA tJIT Parameter CMOS I/O Supply Voltage SDO Supply Voltage Digital Logic Supply Voltage PLL Supply Voltage Analog Supply Voltage CMOS Input Voltage, Low Level CMOS Input Voltage High Level Operating Free Air Temperature Video Clock Jitter VCLK 0 30 Conditions VDDIO−VSSIO VDDSD−VSSSD VDDD–VSSD VDDPLL–VSSPLL VDDZ–VSSD Reference Min 3.150 3.150 2.375 2.375 2.375 VSSIO VDDIO +70 Typ 3.300 3.300 2.500 2.500 2.500 Max 3.450 3.450 2.625 2.625 2.625 Units V V V V V V V ˚C psP-P DC Electrical Characteristics Over Supply Voltage and Operating Temperature ranges, unless otherwise specified (Notes 2, 3). Symbol VIH VIL IIH IIL VOH VOL VSDO Parameter Input Voltage High Level Input Voltage Low Level Input Current High Level Input Current Low Level CMOS Output Voltage High Level CMOS Output Voltage Low Level Serial Driver Output Voltage VIH = VDDIO VIL = VSSIO IOH = −6.6 mA IOL = +6.6 mA Test Circuit, Test Loads Shall Apply VCLK = 27 MHz, NTSC color Bar Pattern, Test Circuit, Test Loads Shall Apply SDO, SDO VDDIO, VDDSD 48 65 mA All LVCMOS Outputs 2.4 VSSIO 720 Conditions Reference All LVCMOS Inputs Min 2.0 VSSIO +90 −1 2.7 VSSIO +0.3 800 Typ Max VDDIO 0.8 +150 −20 VDDIO VSSIO +0.5V 880 Units V V µA µA V V mVP-P IDD (3.3V) Power Supply Current, 3.3V Supply, Total 5 www.national.com LMH0030 DC Electrical Characteristics Symbol Parameter IDD (3.3V) Power Supply Current, 3.3V Supply, Total (Continued) Over Supply Voltage and Operating Temperature ranges, unless otherwise specified (Notes 2, 3). Conditions VCLK = 74.25 MHz, NTSC color Bar Pattern, Test Circuit, Test Loads Shall Apply VCLK = 27 MHz, NTSC color Bar Pattern, Test Circuit, Test Loads Shall Apply VCLK = 74.25 MHz, NTSC color Bar Pattern, Test Circuit, Test Loads Shall Apply Reference VDDIO, VDDSD 66 90 mA Min Typ Max Units IDD (2.5V) Power Supply Current, 2.5V Supply, Total VDDD, VDDZ, VDDPLL 66 85 mA IDD (2.5V) Power Supply Current, 2.5V Supply, Total VDDD, VDDZ, VDDPLL 85 110 mA AC Electrical Characteristics Over Supply Voltage and Operating Temperature ranges, unless otherwise specified (Note 3). Symbol fVCLK DCV fACLK DCA tr, tf BRSDO tr, tf tr, tf tj tj tLOCK tLOCK tS tH tS tH Parameter Parallel Video Clock Frequency Video Clock Duty Cycle Ancillary Clock Frequency Ancillary Clock Duty Cycle Input Clock and Data Rise Time, Fall Time Serial Data Rate Rise Time, Fall Time Rise Time, Fall Time Output Overshoot Serial Output Jitter, Intrinsic Serial Output Jitter, Intrinsic Lock Time Lock Time Setup Time, Video Data Hold Time, Video Data Setup Time, Anc. Data Port Hold Time, Anc. Data Port 10%–90% (Notes 5, 6) 20%–80%, (Note 6) 20%–80%, (Note 5) (Note 4) 270 Mbps, (Notes 5, 9, 10, 11) 1,485 Mbps, (Notes 6, 9, 10, 11) (Notes 5, 7) (SD Rates) (Notes 6, 7) (HD Rates) Timing Diagram, (Note 4) Timing Diagram, (Note 4) Timing Diagram, (Note 4) Timing Diagram, (Note 4) DVN to VCLK VCLK to DVN ADN to ACLK ACLK to ADN Conditions Reference VCLK VCLK ACLK ACLK VCLK, ACLK, DVN, ADN SDO, SDO SDO, SDO SDO, SDO SDO, SDO SDO, SDO SDO, SDO 500 5 270 85 15 15 1.5 1.5 1.5 1.5 2.0 2.0 2.0 2.0 350 125 Min 27 45 50 Typ Max 74.25 55 VCLK 45 1.0 270 50 1.5 55 3.0 1,485 270 Units MHz % MHz % ns Mbps ps ps % psP-P psP-P ms ms ns ns ns ns Note 1: “Absolute Maximum Ratings” are those parameter values beyond which the life and operation of the device cannot be guaranteed. The stating herein of these maximums shall not be construed to imply that the device can or should be operated at or beyond these values. The table of “Electrical Characteristics” specifies acceptable device operating conditions. Note 2: Current flow into device pins is defined as positive. Current flow out of device pins is defined as negative. All voltages are referenced to VSS = 0V. Note 3: Typical values are stated for VDDIO = VDDSD = +3.3V, VDDD = VDDPLL = +2.5V and TA = +25˚C. Note 4: Specification is guaranteed by design. Note 5: RL = 75Ω, AC-coupled @ 270 Mbps, RREFLVL = RREFPRE = 4.75 kΩ 1%, See Test Loads and Test Circuit. Note 6: RL = 75Ω, AC-coupled @ 1,485 Mbps, RREFLVL = RREFPRE = 4.75 kΩ 1%, See Test Loads and Test Circuit. Note 7: Measured from rising-edge of first DVCLK cycle until Lock Detect output goes high (true). Lock time includes format detection time plus PLL lock time. www.national.com 6 LMH0030 AC Electrical Characteristics (Continued) Note 8: Average value measured between rising edges computed over at least one video field. Note 9: Intrinsic timing jitter is measured in accordance with SMPTE RP 184-1996, SMPTE RP 192-1996 and the applicable serial data transmission standard, SMPTE 259M-1997 or SMPTE 292M-1998. A color bar test pattern is used. The value of fSCLK is 270 MHz or 360 MHz for SMPTE 259M, 540MHz for SMPTE 344M, or 1485 MHz for SMPTE 292M serial data rates. See Timing Jitter Bandpass section. Note 10: Intrinsic jitter is defined in accordance with SMPTE RP 184-1996 as: jitter at an equipment output in the absence of input jitter. As applied to this device, the input port is VCLK and the output port is SDO or SDO. Note 11: Specification is guaranteed by characterization. Test Loads 20180304 Timing Jitter Bandpass 20180306 7 www.national.com LMH0030 Test Circuit 20180307 www.national.com 8 LMH0030 Timing Diagram 20180308 Device Operation The LMH0030 SDTV/HDTV Serializer is used in digital video signal origination equipment: cameras, video tape recorders, telecines and video test and other equipment. It converts parallel SDTV or HDTV component digital video signals into serial format. Logic levels within this equipment are normally produced by LVCMOS logic devices. The encoder produces serial digital video (SDV) signals conforming to SMPTE 259M, SMPTE 344M, or SMPTE 292M. The LMH0030 operates at parallel data rates of 27.0 MHz, 36.0 MHz, 54.0 MHz, 74.176MHz and 74.25 MHz. Corresponding serial data rates are 270 Mbps, 360 Mbps, 540 Mbps, 1.4835 Gbps and 1.485 Gbps. VIDEO DATA PATH The input data register accepts 10-bit standard definition or 20-bit high definition parallel data and associated parallel clock signals having LVCMOS-compatible levels. All parallel video data inputs, DV[19:0], have internal pull-down devices. VCLK does not have an internal pull-down device. Parallel video data may conform to any of several SMPTE standards: 125M, 267M, 260M, 274M, 295M or 296M. Some segmented frame formats are not supported. For HDTV data, the upper 10 bits of the DV input are luminance (luma) information and the lower 10 bits are color difference (chrominance or chroma) information. For SDTV data, the lower order 10 bits contain both luma and chroma information. Output from this register feeds the video FIFO, video format detection circuit, TRS character detector, SMPTE scrambler, EDH/CRC generators, serializer/NRZI converter and the device control system. Data from the input data register passes into a 4-register deep video FIFO prior to encoding and other processing. The depth of this FIFO is set by the VIDEO FIFO Depth[2:0] bits of the ANC 0 control register. The video format detector automatically determines the raster characteristics (video data format) of the parallel input data and configures the LMH0030 to properly handle the data. This assures that the data will be properly formatted, that the correct data rate is selected and that ancillary data, line numbers (HD) and CRC/EDH data are correctly inserted. Indication of the standard being processed is stored in the FORMAT[4:0] bits in the FORMAT 1 control data register. This format data can be programmed for output on the multi-function I/O port. The LMH0030 normally operates in an auto-format-detection mode. It may optionally be configured to process only a single video format by writing the appropriate FORMAT SET[4:0] control data into the FORMAT 0 control register. The default state of FORMAT SET[4:0] is 0000b. Also, the 9 LMH0030 may be configured to handle only the standarddefinition data formats by setting the SD ONLY bit or only the high-definition data formats by setting the HD ONLY bit in the FORMAT 0 control register. When both of these bits are reset the part automatically selects the data rate. The TRS character detector processes the timing reference signals which control raster framing. The TRS detector supplies control signals to the system controller to identify the presence of the valid video data. The system controller supplies necessary control signals to the EDH/CRC control block. TRS character LSB-clipping as prescribed in ITU-R BT.601 is used. LSB-clipping causes all TRS characters with a value between 000h and 003h to be forced to 000h and all TRS characters with a value between 3FCh and 3FFh to be forced to 3FFh. Clipping is done prior to scrambling and EDH/CRC character generation. The LMH0030 incorporates circuitry for LSB dithering. The Dither Enable bit in the VIDEO INFO 0 register when set enables dithering. The V Dither Enable bit in the VIDEO INFO 0 control register when set enables dithering during the vertical blanking interval. The initial condition of Dither Enable and V Dither Enable is OFF. The SMPTE scrambler accepts 10-bit standard definition or 20-bit high definition parallel video data and encodes it using the polynomial X9 + X4 + 1 as specified in the respective standard: SMPTE 259M, SMPTE 344M, or SMPTE 292M. The data is then serialized and sent to the NRZ-to-NRZI converter before being output. The transmission bit order is LSB-first. The NRZ-to-NRZI converter accepts NRZ serial data from the SMPTE scrambler. The data is converted to NRZI format using the polynomial (X + 1). The converter’s output goes to the output cable driver amplifier. ANCILLARY/CONTROL DATA PATH The 10-bit, bi-directional Ancillary and Control Data Port performs two distinct functions in the LMH0030. First, it is used to selectively load ancillary data into the Ancillary Data FIFO for insertion into the video data stream. The utilization and flow of ancillary data within the device is managed by a system of control bits, masks and IDs in the control data registers. Second, this port provides read/write access to contents of the configuration and control registers. Ancillary and control data are input via the 10-bit Ancillary/ Control Data Port, AD[9:0]. The state of the RD/WR control input determines whether data is read or written to the registers or written to the Ancillary Data FIFO. The state of the ANC/CTRL control input selects which of the ancillary data or control data sub-systems is accessed through the port. www.national.com LMH0030 Device Operation (Continued) The ACLK input controls data flow through the port. The operation and frequency of ACLK is independent of the video data clock, VCLK. However, the frequency of ACLK must be less than or equal to VCLK. There is no low frequency limit for ACLK when it is being used for control register access. When theANC/CTRL input is a logic-high, ACLK affects only the ancillary data FIFO operation. When the ANC/CTRL input is a logic-low, ACLK affects only the control register operation. Inputs AD[9:0], RD/WR and ANC/CTRL have internal pull down devices. ACLK does not have an internal pull down device. CONTROL DATA READ FUNCTIONS Control data is written to and read from the LMH0030 using the lower-order 8 bits AD[7:0] of the Ancillary/Control Data Port. This control data initializes, monitors and controls operation of the LMH0030. The upper two bits AD[9:8] of the port are handshaking signals with the device accessing the port. AD[9:8] must be driven as 00b (0XXh, where XX are AD[7:0]) when either a control register read or write address is being written to the port. AD[9:8] must be driven as 11b (3XXh, where XX are AD[7:0]) when control data is being written to the port. When control data is being read from the port, the LMH0030 will output AD[9:8] as 10b (2XXh, where XX are output data AD[7:0]) and may be ignored by the monitoring system. Note: When power is first applied to the device or after it is reset, the Ancillary and Control Data Port must be initialized to receive data. This is done by toggling ACLK three (3) times. Figure 1 shows the sequence of clock and control signals for reading control data from the ancillary/control data port. The Control Data Read mode is entered by making the ANC/CTRL input low and the RD/WR input high. Next, the 8-bit address of the control register set to be accessed is placed on port bits AD[7:0]. When a control register read address is being written to the port, AD[9:8] must be driven as 00b (0XXh, where XX are AD[7:0]). ACLK is then toggled. The address is captured on the rising edge of ACLK. Observe the port input hold timing specification. Data from the selected register is driven by the port within a few nanoseconds immediately following the rising edge of ACLK. To avoid contention with the port, the address driver should be turned off or tri-stated immediately after the address is clocked into the device. Data may be read by external devices at any time after the removal of the address signal. Output data will be driven until the next rising edge of ACLK. When the host system finishes reading the data, toggle ACLK again. This second clock resets the port from drive to receive mode and readies the port for another access cycle. When control data is being read from the port, the LMH0030 will output AD[9:8] as 10b (2XXh, where XX are output data AD[7:0]) and may be ignored by the monitoring system. Example: Read the Full-field Flags via the AD port. 1. Set ANC/CTRL to a logic-low. 2. Set RD/WR to a logic-high. 3. Present 001h to AD[9:0] as the register address. 4. Toggle ACLK. 5. Release the bus driving the AD port. 6. Read the data present on the AD port. The Full-field Flags are bits AD[4:0]. 7. Toggle ACLK to release the AD port. 20180309 FIGURE 1. Control Data Read Timing (2 read and 1 write cycle shown) www.national.com 10 LMH0030 Device Operation (Continued) CONTROL DATA WRITE FUNCTIONS Figure 2 shows the sequence of clock and control signals for writing control data to the ancillary/control data port. The control data write mode is similar to the read mode. The control data write mode is started by making both the ANC/ CTRL input low and the RD/WR input low. Next, the 8-bit address of the control register set to be accessed is placed on port bits AD[7:0]. When a control register write address is being written to the port, AD[9:8] must be driven as 00b (0XXh, where XX are AD[7:0]). Toggle ACLK. The address is captured on the rising edge of ACLK. Remove the address after clocking it into the device on or before the falling edge of ACLK. Observe the port input hold timing specification. Next, the control register data is placed on the AD[7:0] port. ACLK is again toggled. The data is written to the selected register on the rising edge of ACLK. When control data is being written to the port, AD[9:8] must be driven as 11b (3XXh, where XX are AD[7:0]). Remove the register data after clocking it into the device on or before the falling edge of ACLK. Observe the port input hold timing specification. Example: Setup (without enabling) the TPG Mode via the AD port using the 1125 line, 30 frame, 74.25MHz, interlaced component (SMPTE 274M) color bars as test pattern. The TPG may be enabled after setup using the Multi-function I/O port or by the control registers. 1. Set ANC/CTRL to a logic-low. 2. Set RD/WR to a logic-low. 3. Present 00Dh to AD[9:0] as the Test 0 register address. 4. Toggle ACLK. 5. Present 327h to AD[9:0] as the register data. 6. Toggle ACLK. 20180310 FIGURE 2. Control Data Write Timing ANCILLARY DATA FUNCTIONS The LMH0030 can multiplex Ancillary Data into the serial component video data stream. The ancillary data packet structure, formatting and control words are given in standard SMPTE 291M. The data may reside in portions of the horizontal and vertical blanking intervals. The data can consist of different types of message packets including audio data. The LMH0030 supports ancillary data in the HANC and VANC areas of standard definition component video and in the chrominance channel (C’r/C’b) only for high-definition operation. As it applies to embedded (multiplexed) audio data, this function follows the recommended practice for AES/EBU default Level A data handling. Figure 3 shows the sequence of clock, data and control signals for writing Ancillary Data to the port. In ancillary data write mode, 10-bit ancillary data is written into the AD[9:0] port and subsequently into the ancillary data FIFO. From the FIFO, the ancillary data can be inserted into the ancillary data areas in the serial video data stream. Ancillary data may be written to the FIFO only when in the ancillary data mode. Ancillary data cannot be read from the FIFO through the AD Port. The process of loading ancillary data into the FIFO is done during the active video portion of the video line. Occurrence 11 of the active video line interval is indicated by the H-bit in the fourth word of the TRS sequence. The H-bit is available on I/O Port bit-2. The ancillary data write process begins by making the ANC/ CTRL input high and the RD/WR input low. Next, the data words are presented to the port in sequence as specified in SMPTE 291M beginning with the DID word. Data presented to the port within the required setup and hold time parameters will be written into the FIFO on the rising edge of ACLK. The user has the option of including a checksum in the ANC input data or of having the LMH0030 calculate and append the checksum. The LMH0030 will append the Ancillary Data Flag to each packet automatically before multiplexing with the video data. The process of writing ancillary data to the FIFO is effectively a double-buffered write operation. Therefore, in order to properly write the last word of the data packet, the CRC, whether supplied with the ANC data packet or internally generated, to the FIFO, ACLK must be toggled two additional times after the last data word is clocked into the port (or when the CRC is being generated internally and appended). In the case where multiple packets are being loaded to the FIFO, the additional clocks are issued after the last word of the final packet is received by the port. www.national.com LMH0030 Device Operation (Continued) Writing of ancillary data to the FIFO, packet handling and insertion into the video data stream are controlled by a system of masking and control bits in the control registers. These and other ancillary data control functions such as CHKSUM ATTACH IN are explained in detail later in this data sheet. 20180311 FIGURE 3. Ancillary Data Write Timing MULTI-FUNCTION I/O PORT The Multi-function I/O port can be configured to provide immediate access to many control and indicator functions within the LMH0030 configuration and control registers. The individual pins comprising this port may be assigned as input or output for selected bits in the control data registers. The multi-function I/O port is configured by way of an 8x6-bit register bank, I/O pin 0 CONFIG through I/O pin 7 CONFIG. The pin configuration registers contain codes which assign a control register bit to a particular I/O pin. Controls and indicators that are accessible by the port and their corresponding selection addresses are given in the I/O Pin Configuration Register Addresses, Table 6. Table 2 gives the control register bit assignments. Caution: When writing data into the control registers via the multi-function I/O port, ACLK must be toggled to register the data as shown in Figure 4. It is not necessary to toggle ACLK when reading data from the multi-function I/O port. Example: Program multi-function I/O port bit-0 as the CRC Luma Error bit output. 1. Set ANC/CTRL to a logic-low. 2. Set RD/WR to a logic-low. 3. Present 00Fh to AD[9:0] as the I/O PIN 0 CONFIG register address. 4. Toggle ACLK. 5. Present 310h to AD[9:0] as the register data. 6. Toggle ACLK. EDH/CRC SYSTEM The LMH0030 has EDH and CRC character generation and insertion circuitry. The EDH system functions as described in SMPTE Recommended Practice RP-165. The CRC system functions as specified in SMPTE 292M. The EDH/CRC polynomial generators accept parallel data from the input register and generate the EDH and CRC check words for insertion in the serial data. Incoming parallel data is checked for errors and the EDH flags are updated automatically. EDH check words and status flags for SDTV data are generated using the polynomial X16 + X12 + X6 + 1 per SMPTE RP165. EDH check words are inserted in the serial data stream at the correct positions in the ancillary data space and formatted per SMPTE 291M. Generation and automatic insertion of the EDH check words is controlled by EDH Force and EDH Enable bits in the control registers. After a reset, the initial state of all EDH and CRC check characters is 00h. The SMPTE 292M high definition video standard employs CRC (cyclic redundancy check codes) error checking instead of EDH. The CRC consists of two 18-bit words generated using the polynomial X18 + X5 + X4 + 1 per SMPTE 292M. One CRC is used for luminance and one for chrominance data. CRC data is inserted at the required place in the video data according to SMPTE 292M. The CRCs appear in the data stream following the EAV and line number characters. EDH and CRC errors are reported in the EDH0, EDH1, and EDH2 register sets of the configuration and control registers. PHASE-LOCKED LOOP SYSTEM The phase-locked loop (PLL) system generates the output serial data clock at 10x (standard definition) or 20x (high definition) the parallel data clock frequency. This system consists of a VCO, dividers, phase-frequency detector and internal loop filter. The VCO free-running frequency is internally set. The parallel data clock VCLK is the reference for the PLL. The PLL automatically generates the appropriate frequency for the serial clock rate. Loop filtering is internal to the LMH0030. The VCO has separate analog and digital power supply feeds: VDDPLLA pin 62, VSSPLLA pin 61, VDDPLLD pin 1, and VSSPLLD pin 2. These may be separately 20180312 FIGURE 4. I/O Port Data Write Timing www.national.com 12 LMH0030 Device Operation (Continued) supplied power via external low-pass filters, if desired. PLL acquisition time is less than 200µs @ 1485 Mbps. The VCO halts when the VCLK signal is not present or is inactive. A LOCK DETECT indicator function is available as a bit in the VIDEO INFO 0 control registers. LOCK DETECT is a logic-1 when the PLL is locked and a valid format has been detected. It can be assigned as an output on the multifunction I/O port. By default LOCK DETECT is assigned as I/O Port bit 4 after power-on or reset . This function also includes logic to check the stability of the device after the digital logic reset is released following PLL lock. If the system is not fully stable, the logic is automatically reset. LOCK DETECT also combines the function of indicating that the LMH0030 has detected the video format being received. This format detect function involves determination of the major raster parameters such as line length, number of video lines in a frame, and so forth. This is done so that information like line numbering can be correctly inserted. The PLL itself will have locked in 200 microseconds (HD rates) or less. However, resolution of all raster parameters may take the majority of a frame. SERIAL DATA OUTPUT DRIVER The serial data outputs provide low-skew complimentary or differential signals. The output buffer is a current-mode design and is intended to drive AC-coupled and terminated, 75Ω coaxial cables. The driver automatically adjusts its output slew rate depending upon the data rate being processed. Output levels are 800 mVP-P ± 10% into 75Ω AC-coupled loads. The 75Ω resistors connected to the SDO outputs function both as drain-load and back-matching resistors. Series back-matching resistors are not used with this output type. The serial output level is controlled by the value of RREFLVL and RREFPRE connected to pin 53 and pin 52, respectively. The RREFLVL resistor sets the peak-to-peak level of the output signal to the required SMPTE nominal level. The RREFPRE resistor sets the value of a pre-emphasis current which is active during the transition times of the HD-rate output signal. The value of RREFLVL is normally 4.75 KΩ, ± 1%. The value of RREFPRE is normally 4.75 KΩ, ± 1%. The voltage present at these pins is approximately +1.3Vdc. The transition times of this output buffer design automatically adjust and are different for the HD and SD data rate conditions. The output buffer is quiescent when the device is in an out-of-lock condition. The output will become active after the PLL is locked and a valid format has been detected. Separate power feeds are provided for the serial output driver: VSSSD, pins 54, 55, and 59; VDDSD, pin 51; and VDDLS, pin 57. CAUTION: This output buffer is not designed or specified for driving 50Ω or other impedance loads. POWER SUPPLIES, POWER-ON-RESET AND RESET INPUT The LMH0030 requires two power supplies, 2.5V for the core logic functions and 3.3V for the I/O functions. The supplies must be applied to the device in proper sequence. The 3.3V supply must be applied prior to or coincident with the 2.5V supply. Application of the 2.5V supply must not precede the 3.3V supply. It is recommended that the 3.3V supply be configured or designed so as to control application of the 2.5V supply in order to satisfy this sequencing requirement. The LMH0030 has an automatic, power-on-reset circuit. Reset initializes the device and clears TRS detection circuitry, all latches, registers, counters and polynomial generators, sets the EDH/CRC characters to 00h and disables the serial output. Table 1 lists the initial conditions of the configuration and control registers. An active-HIGH-true, manual reset input is available at pin 64. The reset input has an internal pull-down device and may be considered inactive when unconnected. Important: When power is first applied to the device or following a reset, the Ancillary and Control Data Port must be initialized to receive data. This is done by toggling ACLK three times. TEST PATTERN GENERATOR (TPG) AND BUILT-IN SELF-TEST (BIST) The LMH0030 includes a built-in test pattern generator (TPG). Four test pattern types are available for all data rates, all HD and SD formats, NTSC and PAL standards, and 4x3 and 16x9 raster sizes. The test patterns are: flat-field black, PLL pathological, equalizer (EQ) pathological and a 75%, 8-color vertical bar pattern. The pathologicals follow the recommendations of SMPTE RP 178-1996 regarding the test data used. The color bar pattern has optional bandwidth limiting coding in the chroma and luma data transitions between bars. The VPG FILTER ENABLE bit in the VIDEO INFO 0 control register enables the color bar filter function. The default condition of VPG FILTER ENABLE is OFF. The TPG also functions as a built-in self-test (BIST) which can verify device functionality. The BIST function performs a comprehensive go/no-go test of the device. The test may be run using any of the HD color bar test patterns or one of two SD test patterns, either a 270 Mbps NTSC full-field color bar or a PAL PLL pathological, as the test data pattern. Data is supplied internally in the input data register, processed through the device and tested for errors using either the EDH system for SD or the CRC system for HD. A go/no-go indication is logged in the Pass/Fail bit of the TEST 0 control register set. This bit may be assigned as an output on the multifunction I/O port. TPG and BIST operation is initiated by loading the code for the desired test pattern into the Test Pattern Select [5:0] bits of the TEST 0 register. Table 5 gives the available test patterns and codes. (Recall also the requirement to initialize the ancillary data port control logic by clocking ACLK at least three (3) complete cycles before attempting to load the first register address). In the default power-on state, TPG Enable appears as bit 7 on the multi-function I/O port. The TPG is run by applying the appropriate frequency at the VCLK input for the format and rate selected and then setting the TPG Enable input on the multi-function I/O port, or by setting the TPG Enable bit in the TEST 0 register. Important: If the TPG Enable input of the I/O port is in its default mapping and is not being used to enable the TPG mode, attempting to enable TPG operation by setting bit 6 of the TEST 0 register will not cause the TPG to operate. This is because the low logic level at the I/O port input pulldown overrides the high level being written to the register. The result is the TPG does not run. The Pass/Fail bit in the TEST 0 control register indicates the test status. If no errors have been detected, this bit will be set to logic-1 approximately 2 field intervals after TPG Enable is set. If errors have been detected in the internal circuitry of the LMH0030, Pass/Fail will remain reset to a 13 www.national.com LMH0030 Device Operation (Continued) 1. 2. 3. Set ANC/CTRL to a logic-low. Set RD/WR to a logic-low. Present 00Dh to AD[9:0] as the TEST 0 register address. logic-0. The TPG or BIST is halted by resetting TPG Enable. The serial output data is present at the SDO outputs during TPG or BIST operation. Caution ! When attempting to use the TPG or BIST immediately after applying power or resetting the device, the TPG defaults to the 270 Mbps SD rate and expects a VCLK clock frequency of 27MHz as input. This is because the code for the test pattern in the TEST 0 register is set to 00h (525 line, 30 frame, 27MHz, NTSC 4x3 reference black). Attempting to apply a VCLK frequency higher than the device expects, according to the setting in the TEST 0 register, may result in the PLL locking up while attempting to slew to its maximum possible frequency. This situation is not recoverable by the use of the device RESET input. To recover from this condition, power must be removed and re-applied to the device. Proper conditioning of the VCLK input, which does not have an internal pull down device, is mandatory to prevent admission of noise or unwanted signals at any time, especially during power-up or reset sequences. It is strongly recommended that VCLK not be applied until device initialization and configuration is completed. Example: Enable the TPG Mode to use the NTSC 270 Mbps color bars as the BIST and TPG pattern. Enable TPG operation using the I/O port. 4. Toggle ACLK. 5. Present 303h to AD[9:0] as the register data (525 line, 30 frame, 27MHz, NTSC 4x3, color bars (SMPTE 125M)). 6. Toggle ACLK. 7. Set TPG ENABLE (I/O Port, bit 7) to a logic-high. 8. Toggle ACLK. 9. The PASS/FAIL indicator (I/O Port, bit 6) is monitored for the result of the test. Alternatively, the TEST 0 register may be read. Bit 7 is the Pass/Fail indicator bit. CONFIGURATION AND CONTROL REGISTERS The configuration and control registers store data which configures the operational modes of the LMH0030 or which result from its operation. Many of these registers can be mapped to the multi-function I/O bus to make them available as external I/O functions. These functions and initial values are summarized in Table 1 and detailed in Table 2. The power-on default condition for the multi-function I/O port is indicated in Table 1 and detailed in Table 6. www.national.com 14 LMH0030 Device Operation Register Function EDH Error (SD) Full-Field Flags Active Picture Flags ANC Flags EDH Force EDH Enable F/F Flag Error A/P Flag Error ANC Flag Error ANC Checksum Force ANC Checksum Error FIFO Empty FIFO Full FIFO Overrun Video FIFO Depth ANC ID ANC Mask FIFO Flush Static Chksum Attach In FIFO Insert Enable ANC Parity Mask Disable VANC Switch Point 0 Switch Point 1 Switch Point 2 Switch Point 3 Format Set SD Only HD Only Format H V F Test Pattern Select TPG Enable Pass/Fail New Sync Position (NSP) SAV EAV Lock Detect VPG Filter Enable Dither_Enable Vert. Dither Enable (Continued) TABLE 1. Configuration and Control Data Register Summary Bits 1 5 5 5 1 1 1 1 1 1 1 1 1 1 3 16 16 1 1 1 1 1 8 8 8 8 5 1 1 5 1 1 1 6 1 1 1 1 1 1 1 1 1 Read or Write R R R R R/W R/W R R R R/W R R R R R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R R R R R/W R/W R R R R R R/W R/W R/W Initial Condition (Note 13) Reset Reset Reset OFF ON Reset Reset Reset OFF Reset Set Reset Reset 000b 0000h FFFFh OFF OFF OFF OFF OFF 00h 00h 00h 00h OFF OFF OFF Assignable to I/O Bus as Output No No No Input Input Output Output Output Input Output Output Output Output No No No No Input Input No No No No No No No No No Output Output Output Output Notes (Note 13) Format [4] (Note 12) (Note 12) (Note 12) (Note 12) 525/27 MHz/Black (Note 12) (Note 12) 00000b OFF Input Input Output Output Output Output Output (Note 12) OFF OFF OFF Input Input No 15 www.national.com LMH0030 Device Operation Register Function Scrambler_ Enable NRZI_Enable LSB_Clipping SYNC_Detect_Enable I/O Bus Pin Config. (Continued) TABLE 1. Configuration and Control Data Register Summary (Continued) Bits 1 1 1 1 48 Read or Write R/W R/W R/W R/W R/W Initial Condition (Note 13) ON ON ON ON See Table 6 Assignable to I/O Bus as No No No No No Notes Note 12: Connected to multifunction I/O port at power-on. Note 13: ON = logic-1, OFF = logic-0 (positive logic). TABLE 2. Control Register Bit Assignments Bit 7 EDH ERROR (SD) reserved F/F FLAG ERROR VIDEO FIFO DEPTH(2) ANC ID(7) ANC ID(15) Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 EDH 0 (register address 01h) EDH FORCE EDH ENABLE F/F FLAGS(4) F/F FLAGS(3) F/F FLAGS(2) F/F FLAGS(1) F/F FLAGS(0) EDH 1 (register address 02h) reserved A/P FLAG ERROR VIDEO FIFO DEPTH(1) ANC ID(6) ANC ID(14) reserved ANC FLAG ERROR VIDEO FIFO DEPTH(0) ANC ID(5) ANC ID(13) A/P FLAGS(4) A/P FLAGS(3) A/P FLAGS(2) A/P FLAGS(1) A/P FLAGS(0) ANC FLAGS(4) FIFO OVERRUN ANC ID(4) ANC ID(12) ANC FLAGS(3) FIFO EMPTY ANC ID(3) ANC ID(11) ANC FLAGS(2) FIFO FULL ANC ID(2) ANC ID(10) ANC FLAGS(1) ANC CHECKSUM ERROR ANC ID(1) ANC ID(9) ANC FLAGS(0) ANC CHECKSUM FORCE ANC ID(0) ANC ID(8) EDH 2 (register address 03h) ANC 0 (register address 04h) ANC 1 (register address 05h) DID ANC 2 (register address 06h) SDID/DBN ANC 3 (register address 07h) DID ANC MASK(7) ANC MASK(6) ANC MASK(5) ANC MASK(4) ANC MASK(3) ANC MASK(2) ANC MASK(1) ANC MASK(0) ANC 4 (register address 08h) SDID/DBN ANC MASK(15) FIFO INSERT ENABLE ANC MASK(14) CHSUM ATTACH IN ANC MASK(13) ANC MASK(12) ANC MASK(11) FIFO FLUSH STATIC ANC MASK(10) ANC MASK(9) ANC MASK(8) ANC 5 (register address 17h) reserved reserved reserved reserved reserved ANC 6 (register address 18h) reserved reserved ANC PARITY MASK LINE(5) PROTECT(2) LINE(5) PROTECT(2) reserved reserved reserved reserved VANC SWITCH POINT 0 (register address 09h) LINE(7) PROTECT(4) LINE(7) PROTECT(4) LINE(6) PROTECT(3) LINE(6) PROTECT(3) LINE(4) PROTECT(1) LINE(4) PROTECT(1) FORMAT SET(4) LINE(3) PROTECT(0) LINE(3) PROTECT(0) FORMAT SET(3) LINE(2) LINE(10) LINE(2) LINE(10) FORMAT SET(2) LINE(1) LINE(9) LINE(1) LINE(9) FORMAT SET(1) LINE(0) LINE(8) LINE(0) LINE(8) FORMAT SET(0) SWITCH POINT 1 (register address 0Ah) SWITCH POINT 2 (register address 19h) SWITCH POINT 3 (register address 1Ah) FORMAT 0 (register address 0Bh) reserved SD ONLY HD ONLY FORMAT 1 (register address 0Ch) www.national.com 16 LMH0030 Device Operation Bit 7 F Bit 6 V (Continued) TABLE 2. Control Register Bit Assignments (Continued) Bit 5 H TEST PATTERN SELECT(5) Bit 4 FORMAT(4) TEST PATTERN SELECT(4) Bit 3 FORMAT(3) TEST PATTERN SELECT(3) Bit 2 FORMAT(2) TEST PATTERN SELECT(2) Bit 1 FORMAT(1) TEST PATTERN SELECT(1) Bit 0 FORMAT(0) TEST PATTERN SELECT(0) TEST 0 (register address 0Dh) PASS/FAIL TPG ENABLE VIDEO INFO 0 (register address 0Eh) DITHER ENABLE VERT. DITHER ENABLE VPG FILTER ENABLE LOCK DETECT EAV SAV NSP reserved MULTI-FUNCTION I/O BUS PIN CONFIGURATION I/O PIN 0 CONFIG (register address 0Fh) reserved reserved reserved reserved reserved reserved reserved reserved reserved reserved reserved reserved reserved reserved reserved reserved PIN 0 SEL[5] PIN 1 SEL[5] PIN 2 SEL[5] PIN 3 SEL[5] PIN 4 SEL[5] PIN 5 SEL[5] PIN 6 SEL[5] PIN 7 SEL[5] SYNC DETECT ENABLE PIN 0 SEL[4] PIN 1 SEL[4] PIN 2 SEL[4] PIN 3 SEL[4] PIN 4 SEL[4] PIN 5 SEL[4] PIN 6 SEL[4] PIN 7 SEL[4] PIN 0 SEL[3] PIN 1 SEL[3] PIN 2 SEL[3] PIN 3 SEL[3] PIN 4 SEL[3] PIN 5 SEL[3] PIN 6 SEL[3] PIN 7 SEL[3] PIN 0 SEL[2] PIN 1 SEL[2] PIN 2 SEL[2] PIN 3 SEL[2] PIN 4 SEL[2] PIN 5 SEL[2] PIN 6 SEL[2] PIN 7 SEL[2] PIN 0 SEL[1] PIN 1 SEL[1] PIN 2 SEL[1] PIN 3 SEL[1] PIN 4 SEL[1] PIN 5 SEL[1] PIN 6 SEL[1] PIN 7 SEL[1] PIN 0 SEL[0] PIN 1 SEL[0] PIN 2 SEL[0] PIN 3 SEL[0] PIN 4 SEL[0] PIN 5 SEL[0] PIN 6 SEL[0] PIN 7 SEL[0] I/O PIN 1 CONFIG (register address 10h) I/O PIN 2 CONFIG (register address 11h) I/O PIN 3 CONFIG (register address 12h) I/O PIN 4 CONFIG (register address 13h) I/P PIN 5 CONFIG (register address 14h) I/O PIN 6 CONFIG (register address 15h) I/O PIN 7 CONFIG (register address 16h) TEST MODE 0 (register address 55h) reserved reserved LSB CLIPPING reserved NRZI ENABLE SCRAMBLER ENABLE reserved 17 www.national.com LMH0030 Device Operation Register Name EDH 0 EDH 1 EDH 2 ANC 0 ANC 1 ANC 2 ANC 3 ANC 4 ANC 5 ANC 6 SWITCH POINT 0 SWITCH POINT 1 SWITCH POINT 2 SWITCH POINT 3 FORMAT 0 FORMAT 1 TEST 0 VIDEO INFO 0 I/O PIN 0 CONFIG I/O PIN 1 CONFIG I/O PIN 2 CONFIG I/O PIN 3 CONFIG I/O PIN 4 CONFIG I/O PIN 5 CONFIG I/O PIN 6 CONFIG I/O PIN 7 CONFIG TEST MODE 0 (Continued) TABLE 3. Control Register Addresses Address Decimal 1 2 3 4 5 6 7 8 23 24 9 10 25 26 11 12 13 14 15 16 17 18 19 20 21 22 85 Address Hexadecimal 01 02 03 04 05 06 07 08 17 18 09 0A 19 1A 0B 0C 0D 0E 0F 10 11 12 13 14 15 16 55 The EDH Enable bit enables operation of the EDH generator function. The EDH ERROR (SD) bit when set indicates that EDH error conditions are being reported in EDH ancillary data packets present in the parallel input data. Details of the specific error conditions contained in the EDH packets are reported via the full field, active picture and ancillary flag error bits and the specific flag bits in these registers. The EDH flags F/F FLAGS[4:0] (full field), A/P FLAGS[4:0] (active picture) and ANC FLAGS[4:0] (ancillary data) are defined in SMPTE RP 165. The EDH flags are stored in the control registers. The flags are updated automatically when the EDH function is enabled and data is being received. The status of EDH flag errors in incoming SD parallel data are reported in the ffFlagError, apFlagError and ancFlagError bits. The ffFlagError, apFlagError and ancFlagError bits are the logical-OR of the corresponding EDH and EDA flags of the EDH checkwords. ANC REGISTER 0 (Address 04h) The V FIFO Depth[2:0] bits control the depth of the video FIFO which follows the input data latches. The depth can be set from 0 to 4 stages deep by writing the corresponding binary code into these bits. For example: to set the Video FIFO depth at two registers, load 11010XXXXXb into the ANC 0 control register (where X represents the other functional bits of this register). To retain other data previously stored in a register, read the register’s contents and logically-OR this with the new data. Then write the composite data back into the register. Flags for FIFO EMPTY, FIFO FULL and FIFO OVERRUN are available in the configuration and control register set. These flags can also be assigned as inputs and outputs on the multi-function I/O port. The FIFO OVERRUN flag indicates that an attempt to write data into a full FIFO has occurred. The ANC Checksum Force bit, under certain conditions, enables the overwriting of ancillary data checksums received in the parallel ancillary data. Calculation and insertion of new ancillary data checksums is controlled by the ANC Checksum Force bit. If a checksum error is detected (calculated and received checksums do not match) and the ANC Checksum Force bit is set, a new checksum will be inserted in the ancillary data replacing the previous one. If a checksum error is detected and the ANC Checksum Force bit is not set, the checksum mismatch is reported via the ANC Checksum Error bit. Ancillary data checksums may be received in the incoming parallel ancillary data. Alternatively they may be calculated and inserted automatically by the LMH0030. The CHKSUM ATTACH IN bit in the control registers when set to a logic-1 indicates that the checksum is to be supplied in the incoming data. When the CHKSUM ATTACH IN bit is set, checksums for incoming data are calculated and checked against received checksums. Calculation and insertion of new ancillary data checksum is controlled by the ANC Checksum Force bit in the configuration and control registers. If a checksum error is detected (calculated and received checksums do not match) and the ANC Checksum Force bit is set, a new checksum will be inserted in the ancillary data replacing the previous one. If a checksum error is detected and the ANC Checksum Force bit is not set, the checksum mismatch is reported via the ANC CHECKSUM ERROR bit in the control registers. EDH REGISTERS 0, 1 AND 2 (Addresses 01h through 03h) Updated EDH packets may be inserted into the serial output data by setting the EDH Force bit in the control registers. The EDH Force control bit causes the insertion of new EDH checkwords and flags into the serial output regardless of the previous condition of EDH checkwords and flags in the input parallel data. This function may be used in situations where video content has been editted thus making the previous EDH information invalid. In the case of SMPTE 292M data, the CRC check characters are recalculated and inserted automatically regardless of the presence of CRC characters in the parallel data. After the LMH0030 is reset, the initial state of the CRC check characters is 00h. www.national.com 18 LMH0030 Device Operation (Continued) SWITCH POINT REGISTERS 0 THROUGH 3 (Addresses 09h, 0Ah, 19h and 1Ah) The Line[10:0] and Protect[4:0] bits define the vertical switching point line and number of protected lines following the switching point line for fields 0 and 1 (or fields 1 and 2 as these are sometimes referred to) of high-defination formats. The vertical switching point for component digital standard definition formats is defined in SMPTE RP 168-1993. The vertical switching point for high-definition formats has the same basic definition. However, since the vertical switching point lines are not necessarily standardized among the various high-definition rasters, these registers provide a convenient means whereby the vertical switching point line and subsequent protected lines may be specified by the user. The Switch Point registers do not operate for standard definition formats. The Line[10:0] bits of registers Switch Point 0 and 1 may be loaded with a line number ranging from 0 to 1023 which then specifies the switching point line for Field 0. The Protect[4:0] bits of register Switch Point 1 determine the number of lines from 0 to 15 after the vertical switching point line in which ancillary data may not be inserted. LINE(0) is the LSB and LINE(10) is the MSB for the Line[10:0] bits. Similar ordering holds for the Protect[4:0] bits. The Line[10:0] and Protect[4:0] bits of registers Switch Point 2 and 3 perform the same function as explained above for the vertical switching point line for Field 1. FORMAT REGISTERS 0 (Addresses 0Bh) The LMH0030 may be set to process a single video format by writing the appropriate data into the FORMAT 0 register. The Format Set[4:0] bits confine the LMH0030 to recognize and process only one of the fourteen specified types of standard or high definition formats. When the LMH0030 is set to process a single format, it will not recognize and therefore will not process other formats that it is capable of recognizing. The Format Set[4:0] bits may not be used to confine device operation to a range of standards. For normal operating situations, it is recommended that the LMH0030 be operated in automatic format detection mode, i.e. that the Format 0 register be set to 00h. The available formats and codes are detailed in Table 4. Generally speaking, the Format Set[4:0] codes indicate or group the formats as follows: Format Set[4] is set for the HD formats and reset for the SD formats. Format Set[3] when set indicates that PAL data is being processed. When reset NTSC data is being processed. Format Set[2:0] correspond to one of the sub-standards given in the table. Note that the LMH0030 makes no distinction in formats resulting from the processing of data at 74.25MHz or 74.176MHz. The HD Only bit when set to a logic-1 locks the LMH0030 into the high definition data range and frequency. In systems designed to handle only high definition signals, enabling HD Only reduces the time required for the LMH0030 to establish frequency lock and determine the HD format being processed. The SD Only bit when set to a logic-1 locks the LMH0030 into the standard definition data ranges and frequencies. In systems designed to handle only standard definition signals, enabling SD Only reduces the time required for the LMH0030 to establish frequency lock and determine the format being processed. When SD Only and HD Only are set to logic-0, the device operates in SD/HD mode. The ANC Checksum Error bit indicates that the received ancillary data checksum did not agree with the LMH0030’s internally generated checksum. This bit is available as an output on the multifunction I/O port. ANC REGISTERS 1 THROUGH 4 (Address 05h through 08h) Admission of ancillary data packets into the FIFO can be controlled by the ANC MASK[15:0] and ANC ID[15:0] bits in the control registers. The ANC ID[7:0] register can be set to a valid 8-bit Data Identification (DID) code used for component ancillary data packet identification as specified in SMPTE 291M. Similarly, theANC ID[15:8] register can be set to a valid 8-bit Secondary Data Identification (SDID) or Data Block Number (DBN) code. The ANC MASK[7:0] is an 8-bit word that can be used to selectively control loading of packets with specific DIDs (or DID ranges) into the FIFO. Similarly, the ANC MASK[15:8] is an 8-bit word that can be used to selectively control loading of packets with specific SDID or DBNs (or SDID or DBN ranges). When ANC MASK[7:0] or ANC MASK[15:8] is set to FFh, packets with any DID, SDID or DBN can be loaded into the FIFO. When any bit or bits of ANC MASK[7:0] or ANC MASK[15:8] are set to a logic-1, the corresponding bit or bits of ANC ID[7:0] or ANC ID[15:8], respectively are a don’tcare when matching IDs of incoming packets. When ANC MASK[7:0] or ANC MASK[15:8] is set to 00h, the DID, SDID or DBN of incoming packets must match exactly, bitfor-bit, the setting of ANC ID[7:0] or ANC ID[15:8] in the control register for the packets to be loaded into the FIFO. The initial value of ANC MASK[7:0] and ANC MASK[15:8] is FFh. The initial value of ANC ID[7:0] and ANC ID[15:8] is 00h. Bits 7 through 0 of Register ANC 1, ANC ID[7:0], and Register ANC3, ANC MASK[7:0], affect DID[7:0]. BIts 7 through 0 of Register ANC2, ANC ID[15:8], and Register ANC 4, ANC MASK[15:8], affect SDID[7:0] or DBN[7:0]. ANC REGISTER 5 (Address 17h) The FIFO INSERT ENABLE bit enables insertion of ancillary data stored in the FIFO into the serial data stream. Data insertion is enabled when this bit is set to a logic-1. This bit can be used to delay automatic insertion of data into the serial data stream. Setting the FIFO FLUSH STAT bit to a logic-1 flushes the FIFO. Data may not be loaded into the FIFO during FIFO FLUSH STAT execution. Similarly, FIFO FLUSH STAT may not be set when data is being input to the FIFO. FIFO FLUSH STAT is automatically reset after this operation is complete. Execution of these FIFO operations requires toggling of ACLK. ANC REGISTER 6 (Addresses 18h) The ANC PARITY MASK bit when set disables parity checking for the DATA ID (DID) and SECONDARY DATA ID (SDID) or Data Block Number (DBN) in the ANC data packet. When reset, parity checking is enabled, and, if a parity error occurs, the packet will not be loaded. The VANC bit in the control registers, when set to a logic-1, enables insertion of ancillary data during the vertical blanking interval. 19 www.national.com LMH0030 Device Operation Format Code [4,3,2,1,0] 00001 00010 00011 01001 01010 01011 10001 10010 10011 11001 11010 11100 11101 10100 (Continued) TABLE 4. Video Raster Format Parameters Format SDTV, 54 SDTV, 36 SDTV, 27 SDTV, 54 SDTV, 36 SDTV, 27 HDTV, 74.25 HDTV, 74.25 HDTV, 74.25 HDTV, 74.25 HDTV, 74.25 HDTV, 74.25 HDTV, 74.25 HDTV, 74.25 Specification SMPTE 344M SMPTE 267M SMPTE 125M ITU-R BT 601.5 ITU-R BT 601.5 ITU-R BT 601.5 SMPTE 260M SMPTE 274M SMPTE 274M SMPTE 274M SMPTE 274M SMPTE 295M SMPTE 274M SMPTE 296M Frame Rate 60I 60I 60I 50I 50I 50I 30I 30I 30P 25I 25P 25I 24P 60P Lines 525 525 525 625 625 625 1125 1125 1125 1125 1125 1250 1125 750 Active Lines 507/487 507/487 507/487 577 577 577 1035 1080 1080 1080 1080 1080 1080 720 Samples 3432 2288 1716 3456 2304 1728 2200 2200 2200 2640 2640 2376 2750 1650 Active Samples 2880 1920 1440 2880 1920 1440 1920 1920 1920 1920 1920 1920 1920 1280 FORMAT REGISTER 1 (Address 0Ch) The LMH0030 can automatically determine the format of the incoming parallel data. The result of this operation is stored in the FORMAT 1 register. The Format[4:0] bits identify which of the many possible video data standards that the LMH0030 can process is being received. These format codes follow the same arrangement as for the Format Set[4:0] bits. These formats and codes are given in Table 4. Bit Format[4] when set indicates that HD data is being processed. When reset, SD data is indicated. Format[3] when set indicates that PAL data is being processed. When reset NTSC data is being processed. Format[2:0] correspond with one of the sub-standards given in the table. The H, V, and F bits register correspond to input TRS data bits 6, 7 and 8, respectively. The meaning and function of this data is the same for both standard definition (SMPTE 125M) and high definition (SMPTE 292M luminance and color difference) video data. Polarity is logic-1 equals HIGHtrue. These bits are registered for the duration of the applicable field. TEST 0 REGISTER (Address 0Dh) The Test Pattern Select bits determine which test pattern is output when the Test Pattern Generator (TPG) mode or the Built-in Self-Test (BIST) mode is enabled. Table 5 gives the codes corresponding to the various test patterns. All HD color bars test patterns are BIST data. Standard Definition BIST test patterns are: NTSC, 27MHz, 4x3 color Bars and PAL, 27MHz, 4x3 PLL Pathological. The TPG Enable bit when set to a logic-1 enables the Test Pattern Generator function and built-in self-test (BIST). This bit is mapped to I/O port bit 7 in the default condition. Note that the input pulldown on the I/O port bit has the effect of overriding the logic level of data being written into the register via the ancillary/Control Data Port. In cases where it is desired to control the state of TPG Enable through the control register instead of the multi-function I/O port, bit 7, www.national.com 20 the I/O port bit must be remapped to another bit in the control registers. Remapping to a read-only function is recommended to avoid possible conflicting data being written into the remapped location. The Pass/Fail bit indicates the result of running the built-in self-test. This bit is a logic-1 for a pass condition. The bit is mapped to I/O port bit 6 in the default condition. VIDEO INFO 0 REGISTER (Address 0Eh) The NSP (New Sync Position) bit indicates that a new or out-of-place TRS character has been detected in the input data. This bit is set to a logic-1 and remains set for at least one horizontal line period or unless re-activated by a subsequent new or out-of-place TRS. It is reset by an EAV TRS character. The EAV (end of active video) and SAV (start of active video) bits track the occurrence of the corresponding TRS characters. Lock Detect is registered as a control signal and is a logic-1 when the PLL is locked and a valid format has been detected. This bit may be programmed as an output on the multi-function I/O port. This bit is mapped to I/O port bit 4 in the default condition. This function also includes logic to check the stability of the device after the digital logic reset is released following PLL lock. If the system is not fully stable, the logic is automatically reset. LOCK DETECT also combines the function of indicating that the LMH0030 has detected the video format being received. This format detect function involves determination of the major raster parameters such as line length, number of video lines in a frame, and so forth. This is done so that information like line numbering can be correctly inserted. The PLL itself will have locked in about 50 microseconds (HD rates, 150 microseconds for SD) or less; however, resolution of all raster parameters may take the majority of a frame. The VPG Filter Enable bit when set enables operation of the Video Pattern Generator filter. Operation of this filter causes LMH0030 Device Operation (Continued) the insertion of transition codes in the chroma and luma data of color bar test patterns where these patterns change from one bar to the next. This filter reduces the magnitude of out-of-band frequency products which can be produced by abrupt transitions in the chroma and luma data when fed to D-to-A converters and picture monitors. The default condition of this bit is reset (off). A method by which the occurrence of pathological data patterns can be prevented has been proposed for SD formats. The LMH0030 implements this process for SD formats. The Dither Enable and Vertical Dither Enable bits control operation of pseudo-random dithering applied to the two LSBs of the video data. Dithering is applied to active video data when the Dither Enable bit is set. When the Vertical Dither Enable bit is set, dithering is applied to that portion of the video line corresponding to active video for lines in the vertical blanking interval. I/O PIN 0 THROUGH 7 CONFIGURATION REGISTERS (Addresses 0Fh through 16h) The Multi-function I/O Bus Pin Configuration registers are used to map the bits of the multi-function I/O port to selected bits of the Configuration and Control Registers. Table 6 details the available Configuration and Control register bit functions that may be mapped to the port and their corresponding mapping addresses. Pin # SEL[5] in each register indicates whether the port pin is input or output. The port pin will be an input when this bit is set and an output when reset. Input-only functions may not be configured as outputs and vice versa. The remaining lower-order five address bits distinguish the particular function. Example: Program, via the AD port, I/O port bit 0 as output for the CRC Luma Error bit in the control registers. 1. Set ANC/CTRL to a logic-low. 2. Set RD/WR to a logic-low. 3. Present 00Fh to AD[9:0] as the I/O PIN 0 CONFIG register address. 4. Toggle ACLK. 5. Present 310h to AD[9:0] as the register data, the bit address of the CRC Luma Error bit in the control registers. 6. Toggle ACLK. TEST MODE 0 REGISTER (Address 55h) The four bits of this register are intended for use as test mode functions. They are not normal operating modes. The bits may be set (enabled) or reset (disabled) by writing to the register. Reading this register sets (enables) all bits to their default ON condition. The Scrambler_Enable bit enables operation of the SMPTE scrambler function. This bit is normally ON. The NRZI_Enable bit enables operation of the NRZ-to-NRZI conversion function. This bit is normally ON. The LSB_Clipping bit enables operation of the LSB clipping function. This bit is normally ON. The Sync_Detect_Enable bit enables operation of the TRS detector function. This bit is normally ON. 21 www.national.com LMH0030 Device Operation Test Pattern Select Word Bits > Video Raster Standard Bit 5 (Continued) TABLE 5. Test Pattern Selection Codes Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 1=HD 0=SD 1=Progressive 0=Interlaced 1=PAL 0=NTSC 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 00=Black 01=PLL Path. 10=EQ Path. 11=color Bars 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 1125 Line, 74.25 MHz, 30 Frame Interlaced Component (SMPTE 260M) Ref. Black PLL Path. EQ Path. color Bars Ref. Black PLL Path. EQ Path. color Bars Ref. Black PLL Path. EQ Path. color Bars Ref. Black PLL Path. EQ Path. color Bars Ref. Black PLL Path. EQ Path. color Bars Ref. Black PLL Path. EQ Path. color Bars Ref. Black PLL Path. EQ Path. color Bars Ref. Black PLL Path. EQ Path. color Bars 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1125 Line, 74.25 MHz, 30 Frame Interlaced Component (SMPTE 274M) 1125 Line, 74.25 MHz, 25 Frame Interlaced Component (SMPTE 274M) 1125 Line, 74.25 MHz, 25 Frame Interlaced Component (SMPTE 295M) 1125 Line, 74.25 MHz, 30 Frame Progressive Component (SMPTE 274M) 1125 Line, 74.25 MHz, 25 Frame Progressive Component (SMPTE 274M) 1125 Line, 74.25 MHz, 24 Frame Progressive Component (SMPTE 274M) 750 Line, 74.25 MHz, 60 Frame Progressive Component (SMPTE 296M) www.national.com 22 LMH0030 Device Operation Test Pattern Select Word Bits > Ref. Black PLL Path. EQ Path. color Bars (SD BIST) Ref. Black PLL Path. (SD BIST) EQ Path. color Bars Ref. Black PLL Path. EQ Path. color Bars Ref. Black PLL Path. EQ Path. color Bars Ref. Black PLL Path. EQ Path. color Bars Ref. Black PLL Path. EQ Path. color Bars Bit 5 (Continued) TABLE 5. Test Pattern Selection Codes (Continued) Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 525 Line, 30 Frame, 27 MHz, NTSC 4x3 (SMPTE 125M) 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 1 0 1 625 Line, 25 Frame, 27 MHz, PAL 4x3 (ITU-T BT.601) 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 525 Line, 30 Frame, 36 MHz, NTSC 16x9 (SMPTE 125M) 625 Line, 25 Frame, 36 MHz, PAL 16x9 (ITU-T BT.601) 525 Line, 30 Frame, 54 MHz (NTSC) 625 Line, 25 Frame, 54 MHz (PAL) Note:SD BIST patterns are NTSC 4x3 color Bars and PAL 4x3 PLL Pathological. HD BIST patterns are color bars for each format. 23 www.national.com LMH0030 Device Operation Register Bit reserved FF Flag Error AP Flag Error ANC Flag Error CRC Error (SD/HD) SAV EAV NSP F V H Format[0] Format[1] Format[2] Format[3] Format[4] FIFO Full FIFO Empty Lock Detect Pass/Fail FIFO Overrun ANC Chksum Error EDH Force Test Pattern Select[0] Test Pattern Select[1] Test Pattern Select[2] Test Pattern Select[3] Test Pattern Select[4] Test Pattern Select[5] EDH Enable TPG Enable reserved (Continued) TABLE 6. I/O Configuration Register Addresses for Control Register Functions Bit Address Pin # SEL [n] [5] 0 0 0 0 0 [4] 0 0 0 0 0 [3] 0 0 0 0 0 [2] 0 0 0 0 1 [1] 0 0 1 1 0 [0] 0 1 0 1 0 Output Output Output Output I/O Port Bit 5 I/P or O/P Power-On Status Addresses x05h through x0Ch are reserved. 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 1 1 1 1 0 0 1 1 0 0 1 1 0 0 1 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 Output Output Output Output Output Output Output Output Output Output Output Output Output Output Output Output Output I/O Port Bit 4 I/O Port Bit 6 I/O Port Bit 3 (SD/HD) I/O Port Bit 0 I/O Port Bit 1 I/O Port Bit 2 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 0 0 1 1 0 0 0 1 0 1 0 1 0 1 0 1 Input Input Input Input Input Input Input Input Input I/O Port Bit 7 www.national.com 24 LMH0030 Device Operation Register Bit Chksum Attach In reserved VPG Filter Enable Dither Enable FIFO Insert Enable (Continued) TABLE 6. I/O Configuration Register Addresses for Control Register Functions (Continued) Bit Address Pin # SEL [n] [5] 1 1 1 1 1 [4] 0 0 0 0 0 [3] 1 1 1 1 1 [2] 0 0 1 1 1 [1] 1 1 0 0 1 [0] 0 1 0 1 1 Input Input Input I/P or O/P Input Power-On Status 25 www.national.com LMH0030 Pin Descriptions Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 VDDPLLD VSSPLLD IO0 IO1 DV0 DV1 DV2 DV3 DV4 VSSD DV5 DV6 DV7 DV8 DV9 VDDD VSSD DV10 DV11 DV12 DV13 DV14 VDDIO DV15 DV16 DV17 DV18 DV19 VSSIO IO2 IO3 IO4 IO5 IO6 IO7 ACLK VDDD AD0 AD1 AD2 AD3 AD4 VSSD AD5 AD6 AD7 AD8 AD9 RD/WR Name Description Positive Power Supply Input (2.5V supply, PLL Logic) Negative Power Supply Input (2.5V supply, PLL Logic) Multi-Function I/O Port Multi-Function I/O Port Parallel Video Input (HD=Chroma, SD=Luma & Chroma) Parallel Video Input (HD=Chroma, SD=Luma & Chroma) Parallel Video Input (HD=Chroma, SD=Luma & Chroma) Parallel Video Input (HD=Chroma, SD=Luma & Chroma) Parallel Video Input (HD=Chroma, SD=Luma & Chroma) Negative Power Supply Input (2.5V supply, Digital Logic) Parallel Video Input (HD=Chroma, SD=Luma & Chroma) Parallel Video Input (HD=Chroma, SD=Luma & Chroma) Parallel Video Input (HD=Chroma, SD=Luma & Chroma) Parallel Video Input (HD=Chroma, SD=Luma & Chroma) Parallel Video Input (HD=Chroma, SD=Luma & Chroma) Positive Power Supply Input (2.5V supply, Digital Logic) Negative Power Supply Input (2.5V supply, Digital Logic) Parallel Video Input (HD=Luma) Parallel Video Input (HD=Luma) Parallel Video Input (HD=Luma) Parallel Video Input (HD=Luma) Parallel Video Input (HD=Luma) Positive Power Supply Input (3.3V supply, I/O) Parallel Video Input (HD=Luma) Parallel Video Input (HD=Luma) Parallel Video Input (HD=Luma) Parallel Video Input (HD=Luma) Parallel Video Input (HD=Luma) Negative Power Supply Input (3.3V supply, I/O) Multi-Function I/O Port Multi-Function I/O Port Multi-Function I/O Port Multi-Function I/O Port Multi-Function I/O Port Multi-Function I/O Port Ancillary/Control Clock Input Positive Power Supply Input (2.5V supply, Digital Logic) Ancillary/Control Data I/O Port Ancillary/Control Data I/O Port Ancillary/Control Data I/O Port Ancillary/Control Data I/O Port Ancillary/Control Data I/O Port Negative Power Supply Input (2.5V supply, Digital Logic) Ancillary/Control Data I/O Port Ancillary/Control Data I/O Port Ancillary/Control Data I/O Port Ancillary/Control Data I/O Port Ancillary/Control Data I/O Port Ancillary/Control Data Port Read/Write Control Input www.national.com 26 LMH0030 Pin Descriptions Pin 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 VDDSD RREFPRE RREFLVL VSSSD VSSSD SDO VDDLS SDO VSSLS VDDZ VSSPLLA VDDPLLA VCLK Reset ANC/CTRL (Continued) Description Ancillary/Control Data Port Function Control Input Positive Power Supply Input (3.3V supply, Output Driver) Output Preemphasis Reference Resistor (4.75 KΩ, 1% Nom.) Output Level Reference Resistor (4.75 KΩ, 1% Nom.) Negative Power Supply Input (3.3V supply, Output Driver) Negative Power Supply Input (3.3V supply, Output Driver) Serial Data True Output Positive Power Supply Input (3.3V supply, Level Shift) Serial Data Complement Output Negative Power Supply Input (3.3V supply, Level Shift) Positive Power Supply Input (2.5V supply, Serializer) Negative Power Supply Input (2.5V supply, PLL Analog) Positive Power Supply Input (2.5V supply, PLL Analog) Video Data Clock Input Manual Reset Input (High True) Name Note: All LVCMOS inputs except VCLK and ACLK have internal pull-down devices. 27 www.national.com LMH0030 Application Information Complete details for the SD130ASM evaluation PCB are available on National’s WEB site. This circuit demonstrates the capabilities of the LMH0030 and allows its evaluation in a native configuration. An assembled demonstration board kit, part number SD130EVK, complete with operating instructions, drawing package and list of materials is available. Contact the Interface Products Group or the Serial Digital Video and Interface Applications Group for ordering information. Complete circuit board layouts, schematics and other information for the SD130EVK are also available on National’s WEB site in the application information for this device. For latest product details and availability information, please see: www.national.com/appinfo/interface. PCB LAYOUT AND POWER SYSTEM BYPASS RECOMMENDATIONS Circuit board layout and stack-up for the LMH0030 should be designed to provide noise-free power to the device. Good layout practice also will separate high frequency or high level inputs and outputs to minimize unwanted stray noise pickup, feedback and interference. Power system performance may be greatly improved by using thin dielectrics (4 to 10 mils) for power/ground sandwiches. This increases the intrinsic capacitance of the PCB power system which improves power supply filtering, especially at high frequencies, and makes the value and placement of external bypass capacitors less critical. External bypass capacitors should include both RF ceramic and tantalum electrolytic types. RF capacitors may use values in the range 0.01 µF to 0.1 µF. Tantalum capacitors may be in the range 2.2 µF to 10 µF. Voltage rating for tantalum capacitors should be at least 5X the power supply voltage being used. It is recommended practice to use two vias at each power pin of the LMH0030 as well as all RF bypass capacitor terminals. Dual vias reduce the interconnect inductance by up to half, thereby reducing interconnect inductance and extending the effective frequency range of the bypass components. The outer layers of the PCB may be flooded with additional VSS (ground) plane. These planes will improve shielding and isolation as well as increase the intrinsic capacitance of the power supply plane system. Naturally, to be effective, these planes must be tied to the VSS power supply plane at frequent intervals with vias. Frequent via placement also improves signal integrity on signal transmission lines by providing short paths for image currents which reduces signal distortion. The planes should be pulled back from all transmission lines and component mounting pads a distance equal to the width of the widest transmission line or the thickness of the dielectric separating the transmission line from the internal power or ground plane(s) whichever is greater. Doing so minimizes effects on transmission line impedances and reduces unwanted parasitic capacitances at component mounting pads. The LMH0030 uses two power supply voltages, 2.5 and 3.3 volts. These supplies connect to the device through seven sets of independent power input pins. The function and system supplied through these is given in the Pin Description Table. The power supply voltages normally share a common 0 volt or ground return system. Either a split plane or separate power planes can be used to supply the positive voltages to the device. In especially noisy power supply environments, such as is often the case when using switching power supplies, separate filtering may be used at the LMH0030’s PLL analog, PLL digital and serial output driver power pins. The LMH0030 was designed for this situation. The digital section, PLL and output driver power supply feeds are independent. See the Pin Description Table and the Connection Diagram for details. Supply filtering may take the form of L-section or pisection, L-C filters in series with these VDD inputs. Such filters are available in a single package from several manufacturers. Despite being independent feeds, all device power supplies should be applied simultaneously as from a common source. PROCESSING NON-SUPPORTED AND pSf RASTER FORMATS The number and type of HD raster formats has proliferated greatly since the LMH0030 was designed. Though not specifically capable of fully or automatically processing these new formats, the LMH0030 may still be capable of serializing them. The user is encouraged to experiment with processing of these formats keeping in mind that the LMH0030 has not been tested to handle raster formats other than those detailed in Table 4. Therefore, the results from attempts to process non-supported formats is not guaranteed. The following guidelines concerning device setup are provided to aid the user in configuring the LMH0030 to attempt limited processing of these other raster formats. In general, the device is configured to defeat its format and TRS detection function and to limit operation to a generic HD format type. (The user should consult Table 4 for guidance on the format groups similar to the non-supported one to be processed). Since these newer formats are in the HD realm, the LMH0030 should be configured to operate in HD-ONLY mode by setting bit-5 of the FORMAT 0 register (address 0Bh). Also, the device should be further configured by loading the FORMAT SET[4:0] bits of this register with a nonspecific HD sub-format code. The complete data word for this HD sub-format code with HD-ONLY bit set is 33Fh (all 10 bits of AD[9:0]). Since this format differs from those in the table, the EAV/SAV indicators are disabled. Without these indicators, line numbering and CRC insertion are disabled and ancillary data insertion will not function. Pre-processing of the parallel data ahead of the LMH0030 will be required to insert CRC data and line numbering. Among the specialized formats are so-called progressivesegmented frame formats (pSf). Refer to SMPTE 274M2003, Annex A. These formats are composed of the video lines of progressive scan rasters rearranged in the manner of an interlaced raster. The even numbered lines are arranged to form Field 1 and the odd numbered lines form Field 2. In other respects, the format is identical to the normal interlaced format. The LMH0030 can serialize these pSf formats provided that the lines of the original progressive raster are first rearranged externally to the LMH0030 before being presented to it for processing. www.national.com 28 LMH0030 SMPTE 292M/259M Digital Video Serializer with Video and Ancillary Data FIFOs and Integrated Cable Driver Physical Dimensions inches (millimeters) unless otherwise noted 64-Pin TQPF Order Number LMH0030VS NS Package Number VEC-64A 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. For the most current product information visit us at www.national.com. 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