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1-14
Architecture Overview
PCMCIA Controller
FIFOs allow burst data transfers to be performed on the Sbus. Large
amounts of ISDN or audio information can be moved to and from the Sbus
with a minimum of processor overhead. The data is formatted by the ISDN
controller into a composite digital serial stream (the Concentration
Highway Interface). This connects to additional on-chip ISDN support
circuitry, and to the external audio CODEC. The ISDN interface is
implemented as a 2B+D Terminal Endpoint.
The Concentration Highway Interface of the ISDN circuitry provides a
variety of different serial digital framing standards and data rates to the
Audio CODEC. This supports a majority of the world standard Digital
Audio formats. Typical configurations include high-quality stereo 16-bit
44.1KHz (CD), and telephony quality mono 8-bit 8KHz (ISDN).
The CS4215 Audio CODEC has the following major features:
•
Stereo analog-to-digital and digital-to-analog conversion
•
4KHz to 48KHz sample rates
•
16-bit linear and 8-bit u-law or A-law coding
•
Serial digital interface, compatible with AT&T CHI Concentration
Highway Interface
•
Microphone and line analog outputs
1.12
PCMCIA Controller
The PCMCIA controller is the Tadpole TS102. This device provides an
interface between the SBus and the PCMCIA bus. It performs the
additional function of providing a serial link between the CPU and
microcontroller. The TS102 supports two PCMCIA Type I, II, and III cards
or devices at a time. However, due to space constraints, the SPARCbook 3
unit is able to support one or two Type I and II cards, but only one Type III
device.
1.13
Modem Interface
The modem interface consists of a microcontroller, a DSP device and a
DAA. The microcontroller is the high-level controlling element and
interfaces to the system bus. The DSP device performs all of the high speed
data manipulation and data conversion. The DAA provides the line
interconnect to the telephone network.
S3GX_TRMBook Page 14 Friday, September 19, 1997 11:39 am
Summary of Contents for SPARCbook 3 series
Page 8: ...viii S3GX_TRMBook Page viii Friday September 19 1997 11 39 am...
Page 44: ...2 16 The SPARC CPU SBus Controller S3GX_TRMBook Page 16 Friday September 19 1997 11 39 am...
Page 76: ...5 8 SCSI Controller DMA Support S3GX_TRMBook Page 8 Friday September 19 1997 11 39 am...
Page 146: ...9 28 MODEM Class 2 Fax Command Set S3GX_TRMBook Page 28 Friday September 19 1997 11 39 am...
Page 180: ...11 30 Display Interface RAMDAC S3GX_TRMBook Page 30 Friday September 19 1997 11 39 am...
Page 216: ...Index vi S3GX_TRMBook Page vi Friday September 19 1997 11 39 am...