
ESS Technology, Inc.
SAM0402-050301
1
ESS Technology, Inc.
ES2898/ES2828
V.90 PCI DSP Modem Solution
Product Brief
DESCRIPTION
The ESS Technology ES2898/ES2828
Tele
Drive
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.42
bis
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.
MODEM FEATURES
Data mode capabilities:
—–
V.90 56 kbps
—–
V.34 33.6 kbps and fallbacks
—–
Standard AT command set
—–
V.42 (LAPM) and MNP error correction
—–
V.42
bis
/MNP 5 data compression
—–
3.3V power supply, 5V input tolerant
Fax mode capabilities:
—–
ITU-T V.17, V.21 ch2, V.27ter, and V.29
—–
Group 3 (TIA/EIA 578 Class 1 and Class 2)
Telephony capabilities:
—–
Telephone answering machine
—–
Full duplex speakerphone
—–
Caller ID
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.
Figure 1 ES2898/ES2828 System Block Diagram
ES2898
Tele
Drive
ES2828
Modem AFE
DAA
18.816 MHz
PCI BUS
INTERFACE
4
CHI BUS I/F