Sunext Technology

SC2120

Single Chip CD-R/RW Controller

This product is not recommended for new designs.

The Sunext SC2120 is a single-chip CD-R/RW controller capable of 52X CD-R write, 32X CD-RW write and 52X CD read speeds. CAV and CLV read and write methods are supported. The SC2120 provides a high level of integration that includes an ARM7 microprocessor, Ultra DMA ATA/ATAPI-5 interface, Analog Front End (AFE), CD Decoder/Encoder, CD Servo, Wobble Processor and integrated Write Strategy.

An advanced architecture affords reduced error rates, greater seek accuracy, and improved seek access time. Power management is provided to reduce power consumption and increase power efficiency.

Features	Benefits
Drive Speed, Write Capability 52X/32X/52X speed All writing modes Focus disturbance detection Flexible write strategies ExacWrite™ buffer underrun protection	Industry-leading speed with choice of write modes (CLV, ZCLV, PCAV, CAV with embedded PLL). Write media of widely varying quality using conventional (CD-R/RW) and 2T (CD-RW Ultra-Speed) write strategies with 1/32T resolution, plus dynamic write strategy for adaptive pulse control. Firmware can reduce write speed on detection of focus disturbance. Optimum laser control is achieved via automated OPC and running OPC (ROPC). Underrun detection and exact restart means smaller buffers and lower cost.
Interface Flexibility ATAPI-5 compliant interface with optional interface mirroring 16, 64 and 128 Mb SDRAM buffer configurations DC and Stepper motor support	Host-side interface supports Ultra DMA Mode 5, PIO Mode 4 and Multi-word DMA Mode 2. Interface mirroring eases PCB layout. Flexible SDRAM configurations enable low-cost drives. Stepper motor allows fine sled positioning.
Firmware Mt. Rainier (CD-MRW) support Runtime FW updates	Mt. Rainier improves the CD-RW user experience. Embedded ARM7 processor supports easy firmware updates for recognition of new media.
Ease of Design All major tracking schemes Runout compensation Advanced C1/C2 error correction Focus drop protection Multiple power control options	Supports all major OPUs: one-beam, three-beam, DPP, DPD. High eccentricity (210um at 6000rpm) runout compensation and flexible C1/C2 error correction for reading poor quality media. OPU protection against focus drop and multiple power control options save PCB components.
High Integration Value Integrated high-performance AFE Embedded ARM7 Processor Integrated 12kB SRAM 216 LQFP Package	Integrated AFE tightly coupled to controller core, reduces PCB space. 32-bit ARM7 accessing internal 32-bit SRAM bus at 45 Mips with no wait states for time-critical code execution. High density low-cost LQFP package, with larger package available for firmware development.

Sunext Products - CD-R/RW Controller