Features • • • • • • • • • Preprogrammed for All Current DVD and CD Write Strategies Five 10-bit DACs for Controlling a Laser Power Amplifier Separate DVD and CD APC Provided On-board Bandgap Reference Timing Programmable by User Adaptive Pulse Shift Programmable End Pulses Serial Interface for Programming Device Small Die Size Enables Inclusion on OPU DVD/CD ALPC Description AT78C1504 is a preprogrammed automatic device for controlling the write, read and erase pulses to a laser diode power amplifier. All of the present DVD and CD write strategies are provided in the device. Automatic power control (APC) and optimum power control (OPC) are also included. Though the device is preprogrammed to provide signal conditioning of the NRZI data stream, it is possible through a serial interface to adjust pulse timing, width and amplitude. Five DACs are provided to individually control the laser diode power amplifier. The device is particularly suited to controlling the laser diode power amplifiers from Atmel’s RF Division. Packaging for inclusion on the PCBA or on the optical pickup unit (OPU) is available. AT78C1504 Figure 1. DVD System Block Diagram DRAM Flash AT78C1501 ATAPI I/F Controller DBM ECC SRAM ARM7TDMI AT78C1502 Servo Control System Power Drivers Sled Focus AT78C1503 Read Channel AT78C1507 Read Channel Adj. Spindle Laser AT78C1504 Laser Power Controller T08XX Laser Amp AT78C1505 Pre-amp Rev. 2051A–DVD–07/02 1 64 SVDD3 HFON LDON WR ER OVF SRF0 DVSS3 SRF1 DVDD3 SERINT DTEST0 DTEST1 DTEST2 WBCLK WDATA WCLK Figure 2. Pin-out 49 1 48 NDT_RD WCLK_N NDT_ER WCLK_P NDT_WR1 FSFILT DVDD5 FSIS DVSS5 NDT_WR2 SVDD3 NDT_WR3 SVSS3 AT78C1504 ALPC 64-lead TQFP AVSS3 RDI DVDD3 DVSS3 ERI SDATA WR1I SDEN AVDD3 SCLK WR2I MIRROR WR3I GAP VREF WEG 16 33 ERASE READ NRST AVSS5 AT/SGA_OUT MON_PD A_IS CDLD CDPD CDPD_GND TSETR RSETE RSETW 32 AVDD5 RCONR 17 G_L WRITE REXTOTC Table 1. DC Parameters Symbol Parameter Min Nom Max Units VCC Supply Voltage 3.0 3.3 3.6 V VDD Supply Voltage 4.5 5.0 5.5 V ICC Operating Current 300 mA Note: 2 Notes Note 1 1. Values listed are advance information and are likely to change as production silicon is characterized. AT78C1504 2051A–DVD–07/02 AT78C1504 External Pin Definition P = Power or ground, B = Bidirectional, I = Digital Input, O = Digital Output AI = Analog Input, AO = Analog Output Table 1. External Pin Definition Pin # Symbol Type Pad Types Description 1 SVDD3 P Ana_VDD 3.3V Synthesizer Power 2 WCLK_N AO Ana_HighI PECL WCLK Negative Output 3 WCLK_P AO Ana_HighI PECL WCLK Positive Output 4 FSFILT AO Ana_HighI Frequency Synthesizer Filter 5 FSIS AI Ana_HighI Frequency Synthesizer CP Iset Resistor 6 SVDD3 P Ana_VDD 3.3V Synthesizer Power 7 SVSS3 P Ana_GND 3.3V Synthesizer Ground 8 AVSS3 P Ana_GND 3.3V Analog Ground 9 RDI AO Ana_HighI Read Level Current DAC Output 10 ERI AO Ana_HighI Erase Level Current DAC Output 11 WR1I AO Ana_HighI Write1 Level Current DAC Output 12 AVDD3 P Ana_VDD 3.3V Analog Power 13 WR2I AO Ana_HighI Write2 Level Current DAC Output 14 WR3I AO Ana_HighI Write3 Level Current DAC Output 15 VREF AO Ana_HighI 2.5V Output Reference Voltage 16 REXTOTC AI Ana_HighI External Current Setting Resistor 17 RCONR AI Ana_HighI Laser Diode Constant Current Setting R 18 AVDD5 P Ana_VDD 5V Analog Power 19 RSETW AI Ana_HighI Write DACs Current Setting R 20 RSETE AI Ana_HighI Erase DACs Current Setting R 21 RSETR AI Ana_HighI Read DACs Current Setting R 22 CDPD_GND AI Ana_HighI Ground Return for CDPD 23 CDPD AI Ana_HighI CD Photo Diode Input 24 CDLD AO Ana_HighI CD Laser Diode Output 25 A_IS P Ana Analog Isolation – Ground 26 MON_PD AI Ana_HighI Monitor Photo Diode Input 27 AT/SGA_OUT AO Ana_HighI Analog Test Monitor/SGA_OUT 28 AVSS5 P Ana_GND 5V Analog Ground 29 NRST I PIC Chip Reset 30 READ I PIC Read Input from Controller 31 ERASE I PIC Read Input from Controller 32 WRITE I PIC Read Input from Controller 33 G_L I PIC Grove (High)/Land Input from Controller 34 WEG I PIC Write or Erase Gate Input from Controller 3 2051A–DVD–07/02 Table 1. External Pin Definition (Continued) 4 Pin # Symbol Type Pad Types 35 Description GAP I PIC Gap Input 36 MIRROR I PIC Mirror Input 37 SCLK I PIC Serial Interface Clock 38 SDEN I PIC Serial Data Enable 39 SDATA B PB2C Serial Data 40 DVSS3 P PP0I 3.3V Digital Ground 41 DVDD3 P PP3I 3.3V Digital Power 42 NDT_WR3 O PO2 Laser Diode Driver Output for Write3 43 NDT_WR2 O PO2 Laser Diode Driver Output for Write2 44 DVSS5 P PP0E 5V Digital Ground 45 DVDD5 P PP5E 5V Digital Power 46 NDT_WR1 O PO2 Laser Diode Driver Output for Write1 47 NDT_ER O PO2 Laser Diode Driver Output for Erase 48 NDT_RD O PO2 Laser Diode Driver Output for Read 49 HFON O PO2 High Frequency Module Enable 50 LDON O PO2 Laser Diode Enable 51 WR O PO2 Write Mode Monitor Output 52 ER O PO2 Erase Mode Monitor Output 53 OVF O PO2 Overflow Interrupt to Controller 54 SRF0 O PO2 I/V Gain Control Output to Pickup 55 SRF1 O PO2 I/V Gain Control Output to Pickup 56 DVSS3 P PP0I 3.3V Digital Ground 57 DVDD3 P PP3I 3.3V Digital Power 58 SERINT I PIC Servo Interrupt 59 DTEST0 O PO2 Digital Test Output 60 DTEST1 O PO2 Digital Test Output 61 DTEST2 O PO2 Digital Test Output 62 WBCLK I PIC Wobble Clock or Oscillator Input 63 WDATA I PIC Write Data Input from Controller 64 WCLK O PO2 Write Channel Clock Output AT78C1504 2051A–DVD–07/02 AT78C1504 Figure 3. AT78C1504 Block Diagram VREF MONPD SGA SGAOUT BCB GCB ATEST 7 COMP FILT_ENA 8 SDATA SCLK 4 SDEN 4 REF DAC NRST CMODE READ HPON LDON WRITE ERASE G_L WR ER PWREN SRF1P SRF2P WEGO Control Logic WEG GAP MIRROR ALPC_INT RCONR INDEX WDATA SERVO-INT READ IDAC WBCLK RSETR READI RSETE ERASE IDAC ERASEI WRITEI2 RSETW WRITE IDAC WRITEI1 WRITEI3 WCHCLK-T Pulse width control CDAPC WCHCLKP-E WCHCLKN-E NDTRD Synthesizer NDTER NDTWR1 PD780 LD780 NDTWR2 NDTWR3 5 2051A–DVD–07/02 Atmel Headquarters Atmel Operations Corporate Headquarters Memory 2325 Orchard Parkway San Jose, CA 95131 TEL 1(408) 441-0311 FAX 1(408) 487-2600 Europe Atmel Sarl Route des Arsenaux 41 Case Postale 80 CH-1705 Fribourg Switzerland TEL (41) 26-426-5555 FAX (41) 26-426-5500 Asia Room 1219 Chinachem Golden Plaza 77 Mody Road Tsimhatsui East Kowloon Hong Kong TEL (852) 2721-9778 FAX (852) 2722-1369 Japan 9F, Tonetsu Shinkawa Bldg. 1-24-8 Shinkawa Chuo-ku, Tokyo 104-0033 Japan TEL (81) 3-3523-3551 FAX (81) 3-3523-7581 2325 Orchard Parkway San Jose, CA 95131 TEL 1(408) 441-0311 FAX 1(408) 436-4314 RF/Automotive Theresienstrasse 2 Postfach 3535 74025 Heilbronn, Germany TEL (49) 71-31-67-0 FAX (49) 71-31-67-2340 Microcontrollers 2325 Orchard Parkway San Jose, CA 95131 TEL 1(408) 441-0311 FAX 1(408) 436-4314 La Chantrerie BP 70602 44306 Nantes Cedex 3, France TEL (33) 2-40-18-18-18 FAX (33) 2-40-18-19-60 ASIC/ASSP/Smart Cards 1150 East Cheyenne Mtn. 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