SAA7811HL

Host interface

` Enhanced Integrated Drive Electronics (IDE) Advanced Technology Attachment Program Interface (ATAPI) host interface
` Built-in 12-byte ATAPI Packet command First-In, First-Out (FIFO)
` Supports Advanced Technology Attachment (ATA) and ATA-2 PIO and multi-word Direct Memory Access (DMA) data transfer modes
` Supports ATA/ATAPI-4 Ultra DMA transfer modes with data rate up to 33 MBytes/s
` Configurable as generic DMA interface, for use with external host interface devices
` Automatic sequencing of ATAPI packet command protocol; including command termination
` Automatic determination of block length for mode2, form 1 and form 2 sectors (block length transferred is programmable).

Block decoder

` Supports CD-ROM, CD-R and CD-R/W; CD-DA and DVD-ROM formats
` Supports real time error detection and correction in hardware for CD-ROM mode
` CD-ROM error corrector switchable between single or dual pass (both with Error Detection/Correction [EDC])
` Internal registers are memory-mapped
` Embedded DVD-video authentication module.

Buffer memory controller

` Supports up to 2 MBytes of DRAM buffer
` Block based sector addressing.

Channel decoder

` Selectable differential and single-ended HF inputs; compatible with TZA1033 (DVDalas2plus) and TZA1020A (Aeger2); single-ended input has bypassable AGC
` Internal 6-bit ADC
` Digital PLL and slicer for HF clock regeneration
` Supports Eight-to-Fourteen Modulation (EFM) and EFM+ demodulation
` Full CD error correction strategy; t = 2 and e = 4
` On-chip CD error corrector memory with ±8 frame jitter margin
` Built-in hardware for double pass DVD error corrector; (can correct 5 errors in C1 frame and 16 errors in C2 frame)
` Error corrector monitor signal available
` I2C-bus output available via programmable vampire pins.

Spindle motor control

` Advanced motor control loop allows Constant Angular Velocity (CAV), Constant Linear Velocity (CLV) and pseudo-CLV playback
` Support for 3-pin and 1-pin tacho control
` Motor control via incoming bit stream or tacho.

Speed operation

` Supports up to 56 * CD-ROM playback
` Supports up to 10 * DVD-ROM playback.

Multimedia functions and built-in DAC

` Supports audio playback via DRAM buffer; allows audio discs to be played at higher speeds
` IEC958 (SPDIF, AES/EBU and DOBM) output with Q to W subcode bits and programmable category code, output at n = 1 rate
` Built-in digital audio DAC including: -4 * oversampling filter
` Built-in digital volume control, attenuator and single-sample interpolator
` Separate left and right channel routing and mute control.

Microcontroller interface

` Embedded microcontroller can operate as 33 MHz or 67 MHz equivalent 80C51
` Embedded co-processor for fast multiply, divide, shift, and normalize instructions; supported by C-compilers
` Co-processor for MSF calculations
` Memory mapped interfaces to sub functions
` External microcontroller support
` Embedded SRAM (1.5 kbytes Xdata, 512 bytes Idata, 224 bytes data and registers)
` 4 banks: on Idata and registers; for better multi-tasking support
` External flash EPROM programming support
   Serial boot possible with empty flash EPROM
   Internal program upload support.
` Code space support up to 1 Mbyte through built-in bank switching
` Debug interface for embedded microcontroller.

Servo processor

` Switched current analog-to-digital converters for diode and error signal inputs
` Selectable servo error or servo diode inputs
` Focus and radial servo loops
` Automatic closed loop gain control available for focus and radial loops
` Built-in access procedure with fast track count input
` High-speed track crossing velocity measurement (>350 kHz) for CD and DVD
` Special DVD track crossing support
` Fast radial brake circuitry
` EFM actuator damping circuitry
` Sledge motor servo loop with enhanced Position Control Sledge (PCS) support
` Sledge stepper motor support
` Adaptive Repetitive Control (ARC)
` Debug interface for servo.

Clock multiplier

` On-chip clock multipliers allows the use of 8.4672 MHz crystal.

Pinout




Description

The SAA7811 is a single-chip device for high speed DVD-ROM applications. The device contains the following blocks previously contained in separate ICs:
· channel decoder
· block decoder
· servo processor
· microcontroller.