The DARTdsp
is designed for audio signal processing applications
using a laptop or standard PC computer with a type 3
PCMCIA slot. The DARTdsp has a 33mflops Lucent
DSP3210 digital signal processor, stereo CD quality audio
input/output channels, 256k bytes of zero wait-state
SRAM, 512k bytes of flash memory, and DRAM options.
PCMCIA Interface
The DARTdsp conforms to type 3 PCMCIA Release
2.1, July 1993. Host program and board communications are
performed using C-callable functions provided as part of
the CAC software libraries.
Audio Channels
A Crystal Semiconductor CS4216 16-bit codec provides
stereo CD quality audio line-in and line-out channels.
On-board amplifiers accept microphone input and provide
adequate headphone output. The CS4216 features 64X
oversampling, sigma-delta modulation, 16-bit resolution,
and auto-tracking anti-aliasing/reconstruction filters.
Serial Port
A 15-pin receptacle on the exterior edge of the board
can accept either our adaptor with two 3.5mm female
stereo jacks or a custom connector for direct interface
to the DSP's 10 mbps serial port.
Options
The DARTdsp may be configured with the DRAM,
flash memory and zero wait-state SRAM shown below. Call
for availability of combinations.
Option
|
Description
|
S2*
|
256k bytes SRAM
|
S1
|
1M bytes SRAM
|
D0*
|
0M bytes DRAM
|
D4
|
4M bytes DRAM
|
F5*
|
521k bytes
FLASH
|
* default
Programmable Features
Both the DSP and the host may control the following:
| Sample Rate - standard: |
8, 9.6, 12, 16, 19.2, 24, 32,
& 48 kHz |
| Sample Rate - optional: |
7.35, 8.82, 11.025, 14.7, 17.64, 22.05, 29.4
& 44.1 kHz |
| Input Gain: |
0 to 22.5 dB |
| Output Attenuation: |
0 to -46.5 dB |
Software Programmers writing dedicated DSP3210
application software can use the Lucent C compiler,
assembler, and applications library package for the
DSP3210. We provide MSDOS and Windows 3.1 libraries
of C-callable functions for host communications and
control, as well as our DSP3210 program debugger, D32Bug,
to assist developers.
For developers of real-time, multi-tasking
applications running under Windows 3.1, Lucent's VCOS
Software Developer's Kit (sdk) and VCOS Module
Developer's Kit (mdk) are included in the DSP3210-VDS
software package. We provide a VCOS-compatible DSP3210
program debugger, VBUG.
Power Requirements
Fully populated, the DARTdsp consumes a maximum
of 2.75 watts at 5v, 1.4 watts when reset and .3 watts
while in the powered down mode.
| Input
Specifications |
| Dynamic Range: |
84 dB
|
| Interchannel isolation: |
80 dB
|
| Interchannel gain mismatch: |
0.1 dB
|
| Frequency response: |
-0.5 to +0.2 dB
|
| Gain step: |
1.5 dB
|
| Gain drift: |
100 ppm/°C
|
Output Specifications |
| Dynamic Range: |
85 dB
|
| Interchannel isolation: |
80 dB
|
| Interchannel gain mismatch: |
0.2 dB
|
| Frequency response: |
-0.5 to 0.2 dB
|
| Gain step: |
1.5 dB
|
| Gain drift: |
110 ppm/°C
|
| Deviation from linear phase: |
1°
|
THD+N @ 1kHz, .75v rms: |
-78.2dB
|
(Measured with Audio Precision ATS-1 with IEC
A-weighting filter and reflect cascade of A/D and
D/A.) |
|
|
