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PNX7850
Datasheet
General description
The Nexperia PNX7850 processor handles all of the encoding and decoding functions required for industry-leading write and read performance in DVD/CD recorders. In addition to a 32-bit MIPS RISC core, it integrates channel and data-block codecs, a servo DSP, a buffer manager, and an audio processor. On its own, the PNX7850 can support write speeds of 8x DVD and 48x CD (early versions support 4x DVD), and read speeds of 16x DVD and 56x CD. When configured with the Philips DVD+RW chipset, the PNX7850 contributes to write performance of 8x DVD+R, 4x DVD+RW, 32x CD-R, and 12x CD-RW, and read performance of 16x DVD-ROM and 48x CD. Exceptional write speeds are due in part to a technology, developed in partnership with Intersil, that moves the writestrategy function off-chip onto the optical pickup unit (OPU).
Designed in accordance with the DVD+RW standard, the PNX7850 is compatible with other DVD and CD formats, including DVD-R/RW and DVD-ROM, as well as CD-ROM and CD-DA. It is manufactured using an advanced 0.18-µm CMOS process that reduces core voltage and power consumption. For portable applications, the PNX7850 offers clock gating and enhanced power-down features.
Features
- Delivers industry-leading performance as part of the Philips DVD+RW chipset:
- Writes 8x DVD+R, 4x DVD+RW, 32x CD-R, and 12x CD-RW
- Reads 16x DVD-ROM,DVD+R,DVD+RW,DVD-R,DVD-RW; and 48x CD-ROM, CD-DA, CD-R, CD-RW
- Integrated functions for lower cost, higher performance
- Channel and data-block codecs
- Buffer manager with ATAPI host interface
- Audio processor for digital audio data
- 32-bit MIPS processor with embedded memory
- Servo DSP with acceleration modules
- Analog front-end
- Power management features for portable applications
- 240-pin PGBA package
- Complete reference design with modular software available
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