Crystal CS-4215
The CS-4215 was an audio codec and DAC (digital to analog converter) IC produced by Crystal for the ISA bus.
|
Released | Early 1993 |
| Bus | ISA 16-bit | |
| FM Synth | None | |
| Sample Range | 4 - 50 kHz | |
| Packages | 44-pin PLCC (-KL variant) or 100-pin TQFP (-KQ) | |
| Standards | None | |
| Plug & Play | No | |
| See Also |
CS4215 is an MwaveTM audio codec from Cirrus Logic/Crystal, designed to take multiple analogue audio inputs, convert them into a digital signal, apply filtering and then convert them back into a combined/mixed analogue audio signal.
MwaveTM MDSP1020 and MDSP2780 was a line of DSP chips created by IBM in joint partnership with Texas Instruments in late 1993/early 1994, and was used on IBM's own sound card of the early 90s, the IBM Mwave Dolphin (MC27803B) and its successor, IBM Mwave Stingray. These were sold in their Aptiva range of desktop PCs.
It was not only designed for gaming audio, but also for voice/fax/modem use, so don't be surprised if a sound card with an Mwave chip also includes an onboard modem.
Revisions
C (Rev.0), D (Rev.1), E (Rev.2), F (Rev.3)
The chip's revision is the letter immediately preceeding the date code.
Competition
In the Media
The Mwave subsystem, which is likely to reduce the cost of supporting desktop multimedia, includes TI's Digital Signal Processor and Intermetrics' DSP operating system, and will be included in future IBM Ultimedia systems later this year, company officials said.
The Mwave subsystem will be capable of simultaneously playing stereo sound, decompressing and displaying images, sending a fax, and managing a telecommunications session.
"Mwave adds another cornerstone to our vision of a future where multimedia computing is pervasive," said Michael A. Braun, assistant general manager of multimedia at IBM.
The initiative, announced here during last week's International Conference on Multimedia and CD-ROM, was just one in a series of announcements from major players that suggested these technologies are about to become more commonplace on the desktop.
"The CD-ROM industry has turned a corner - it's not only games and entertainment anymore," said Steve Barlow, product manager for multimedia at Lotus Development Corp.
Lotus demonstrated a CD-ROM-based version of its 1-2-3 for Windows spreadsheet, which will include a multimedia application called SmartHelp.
Sony Corp. of America showed a prototype portable computer designed to read and display CD ROM and CD ROM XA disks (XA disks include digitized sound, in addition to text and images).
Microsoft Corp. said it is developing a run-time version of Viewer for the Sony device. Viewer is Microsoft's CD ROM-based multimedia search-and-retrieval software that plays animation and sound, said Christine Doerr, director of multimedia authoring tools at Microsoft.
Microsoft also announced with Intel Corp. a Media Control Interface (MCI) specification that will allow Windows users to access future digital video applications. MCI will also let DVI (digital video interactive) be played from within Windows. Software to support distribution and access of multimedia from CD ROMs across a network was introduced by Lotus and Meridian Technology.
Other products debuted will fuel support for desktop multimedia, including double-speed CD ROM drives with 300K-per-second transfer rates; recorders for CD ROM masters prices as low as $6,000; and SCSI interfaces that use the parallel printer port for audio output or CD ROM drive controls."
Byte, 16th March 1992
Setting it Up
There is no configuration required for the CS-4215.
Downloads
Datasheet |
