ESS Technology, Inc.
DESCRIPTION
The ESS Technology ES2898/ES2828
TeleDrive
®
chipset
is a highly integrated solution that brings advanced
modem functionality to notebooks, desktops, and add-in-
cards. The ES2898/ES2828 chipset provides an efficient
56k (V.90) data/fax solution and adds both a telephone
answering machine (TAM) feature and a full-duplex
speakerphone feature.
The data pump algorithms run on the ES2898 DSP, along
with the echo cancellation required for implementing a full-
duplex speakerphone feature. The host CPU is utilized to
run the modem controller functions, including the standard
AT command set, V.42bis data compression features,
Classes 1 and 2 fax, and ITU-T V.80 sync access to
support H.324 video conferencing applications. The
ES2898 DSP offers an integrated PCI bus interface.
The ES2828 is the companion analog-front-end (AFE)
chip to the ES2898. It integrates a low-pass, continuous-
time anti-aliasing filter, a 16-bit resolution ADC, a 16-bit
DAC, a low-pass output-reconstruction filter, and a CHI
bus interface to interface to the ES2898. The ES2828
includes two signal processing channels that operate
synchronously so that data reception at the ADC channel
and data transmission from the DAC channel occur during
the same time interval. The ES2828 also incorporates an
AC-Link to interface to core logic chipsets to provide a
standalone MC‘97 host-based V.90/V.92 modem solution.
The ES2898 DSP is available in an industry-standard 100-
pin low-profile quad flat pack (LQFP) package. The
ES2828 is available in an industry-standard 48-pin low-
profile quad flat pack (LQFP) package.
ES2898/ES2828
V.90 PCI DSP Modem Solution
Product Brief
MODEM FEATURES
•
Data mode capabilities:
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—–
—–
—–
—–
—–
—–
—–
—–
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V.90 56 kbps
V.34 33.6 kbps and fallbacks
Standard AT command set
V.42 (LAPM) and MNP error correction
V.42bis/MNP 5 data compression
3.3V power supply, 5V input tolerant
ITU-T V.17, V.21 ch2, V.27ter, and V.29
Group 3 (TIA/EIA 578 Class 1 and Class 2)
Telephone answering machine
Full duplex speakerphone
Caller ID
•
Fax mode capabilities:
•
Telephony capabilities:
•
Sigma-delta modulation codec
•
Programmable downsampling frequency for modem and
voice applications
•
•
•
•
•
ACPI power management support
TIES escape sequence
V.80 (H.324 software stack compatible)
Fully ACPI-compliant
Microsoft Windows
™
98/SE/ME/2000:
—–
—–
UNIMODEM V
TAPI
•
Microsoft Windows NT 4.0
SYSTEM BLOCK DIAGRAM
Figure 1 Shows the ES2898/ES2828 system block
diagram.
CHI BUS I/F
PCI BUS
INTERFACE
ES2898
TeleDrive
4
ES2828
Modem AFE
DAA
18.816 MHz
Figure 1 ES2898/ES2828 System Block Diagram
ESS Technology, Inc.
SAM0402-050301
1
ETC [ ETC ]
