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부품번호 ES1988 기능
기능 PCI Audio-Modem Accelerator Product Brief
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ES1988 데이터시트, 핀배열, 회로
ESS Technology, Inc.
ES1988 Allegro
PCI Audio-Modem Accelerator
Product Brief
DESCRIPTION
The ES1988 AllegroPCI audio-modem accelerator combines
advanced audio and modem functionality in a highly integrated
PCI solution. Utilizing one PCI load, the ES1988 provides a two-
chip audio-modem solution with digital interface capability to an
AC‘97 codec in the dock (a.k.a. digital docking). The ES1988 is
designed to provide a low-cost, high-performance solution for
notebook PC applications.
The high-bandwidth PCI bus and an integrated high-fidelity
codec are utilized to deliver advanced PC audio features, such
as DirectSoundacceleration and HRTF 3D positional audio.
The ES1988 implements multistream DirectSound and
DirectSound3D acceleration with digital mixing, sample rate
conversion, and HRTF 3D filtering for two-speaker 3D positional
audio.
The programmable audio signal processor provides support for
multiple audio streams. With its built-in DSP core, the ES1988
uses its dedicated direct memory access (DMA) engine to handle
complex signal processing tasks with a bus-mastering PCI
interface. The support functions ensure efficient transfer of audio
data streams to and from system memory buffers, providing a
system solution with maximum performance and minimal host
CPU loading. The architecture enables implementation of
communications over the Internet from multiple sources.
The ES1988 maintains full DOS legacy audio compatibility over
the standard PCI 2.1 and PCI 2.2 bus. Full DOS game
compatibility is ensured through either PC/PCI, distributed DMA
(DDMA), or transparent DMA (TDMA).
The ES1988 includes an HSP modem interface via its secondary
AC-Link connecting with the ES2828 MC‘97 codec. The MC‘97
is used as the analog front end for the modem and DAA control.
The V.90 modem runs on the host while the ES1988 serves as
the bidirectional buffer for data transmission and reception. The
modem functions include the standard AT command set, V.42bis
and Group 3 fax.
The ES1988 provides a high-quality docking solution through
proven AC-link-based digital docking. This is accomplished by
using only a five-wire digital connection. The secondary AC‘97
link (extension 2.1 compliant) of the ES1988 interfaces to a
secondary AC‘97 codec in the dock to provide high-quality audio
in the dock.
The ES1988, which operates at 3.3V digitally and 5.0V in analog,
is compliant with the Advanced Power Management (APM) 1.2,
Advanced Configuration and Power Interface (ACPI) 1.0, and
PCI Power Management Interface (PPMI) 1.0. The ES1988
supports D0, D1, D2, and D3 (hot and cold) power-saving modes
for power efficiency when the audio system is both active and
idle. CLKRUN# support is also available.
The ES1988 is available in an industry-standard 100-pin low-
profile quad flat pack (LQFP) package.
AUDIO FEATURES
High-performance single-chip PCI audio acceleration
Integrated high-fidelity AC‘97 codec
Multistream DirectSound and DirectSound 3D acceleration
Sensaura® CRL positional 3D
High-quality sample rate conversion and digital mixing
Direct music support
Realtime effects processing
S/PDIF output for PCM or AC-3 content
Full legacy DOS game support, using TDMA, PC/PCI, or DDMA
hardware implementation methods
Supports one additional PCI bus master devices
HSP modem interface via MC‘97 link
Digital docking via secondary AC-Link
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.42bis/MNP 5 data compression
—– 3.3V power supply with 5V-tolerant inputs
Fax mode capabilities:
—– ITU-T V.17, V.21 ch2, V.27ter, V.29
—– Group 3 (TIA/EIA 578 Class 1 and Class 2)
Supports wake-on-ring from D3hot and D3cold states
POWER MANAGEMENT
Compliance with APM 1.2, ACPI 1.0, and PPMI 1.1
Compliance with Intel’s Mobile Power Guidelines ‘99
3.3V digital operation with 5V-tolerant inputs
5.0V analog operation
COMPATIBILITY
Supports PC DOS games and applications for Sound Blaster
and SoundBlaster Pro
Meets PC99 /PC2001and WHQL specifications
Compliant with Intel’s audio-modem riser card and mini-PCI
specifications
ESS Technology, Inc.
SAM0368-030601
1




ES1988 pdf, 반도체, 판매, 대치품
ES1988 PRODUCT BRIEF
Table 1 ES1988 Pin Descriptions (Continued)
Names
Pin Numbers
I/O
GD[3]
I/O
ECLK
VOLDN#
O
45
I
GD[4]
GD[5:7]
GPIO[13:15]
I2SCLK
SIRQ#
GPIO4
I2SLR
GTO#
GSO
46
47:49
50
51
I
I
I/O
I
I/O
I/O
I
O
O
GPIO5
I2SDATA
R0#
GPIO6
MC_97DI
PCREQ#
VOLUP#
I/O
I
I
52
I/O
I
O
53
I
GPIO7
PME#
SPDIFO
PCGNT#
VOLDN#
I/O
O
O
54 I
I
VAUX
I
55
Descriptions
Game port data input/output.
Clock output to EEPROM clock input. ECLK goes active after power-on reset and goes inactive
automatically after EEPROM cycle is complete.
Hardware volume control (volume down). Used in combination with pin 44 (VOLUP#). Hardware
volume control is enabled by setting PCI 52 [7] = 1. Pins 44:45 are selected for hardware volume
control by setting PCI 52h [5] = 1. Pins 53:54 may also be used for hardware volume control.
Game port data input.
Game port data input.
General-purpose input/output.
I2S serial clock input. I2S input is enabled by setting Allegro_Base+37h [15] = 1.
Serial interrupt request. Optional PC/PCI system implementation. Serial IRQ is enabled by
setting PCI 40h [14] = 1.
General-purpose input/output.
I2S frame sync input. I2S input is enabled by setting Allegro_Base+37h [15] = 1.
Grant to PCI master. GTO# is enabled by setting PCIx2 arbiter bits PCI 58h [0] = 1 and PCI 58h
[11] = 1. Select GT0#/GSO from pin 51 by enabling PCI 58h [10] = 0. Pin 63 may also be used as
GT0#/GSO.
Grant select 0 output to control external quick switch to grant PCI master phase. GSO is enabled
by setting PCIx2 arbiter bit PCI 58h [0] = 1 and PCI 58h [11] = 0. Select GS0/GT0# from pin 51
by enabling PCI 58h [10] = 0. Pin 63 may also be used as GT0#/GSO.
General-purpose input/output.
I2S data input. I2S input is enabled by setting Allegro_Base+37h [15] = 1.
PCI bus request 0 input from external PCI master device. RO# is enabled by setting the PCIx2
arbiter bit PCI 58h [0] = 1. Select R0# from pin 52 by enabling PCI 58h [10] = 0. Either pin 2 or
pin 52 may be used for R0#.
General-purpose input/output.
Modem codec data input. Enabled by setting Allegro_Base+38h [3] = 1.
PC/PCI request output. Enable PCREQ# by setting PCI 50h [10:8] = 010. Pin 53 is used as
PCREQ# when configured as an audio-only device. PCREQ# can only be used from pin 2 when
configured as a multifunction device (see pin 60 note).
Hardware volume control (volume up). Used in combination with pin 54 (VOLDN#). Hardware
volume control is enabled by setting PCI 52 [7] = 1. Pins 53:54 are selected for hardware volume
control by setting PCI 52h [5] = 0. Pins 44:45 may also be used for hardware volume control.
General-purpose input/output.
PME# output to wake the system. PME is enabled by setting the PME_EN bit (PCI C5h [0] = 1).
S/PDIF output. Enable SPDIFO by setting PCI 53h [0] = 1. Select SPDIFO from pin 54 by setting
PCI 58h [1] = 0. Either pin 2 or pin 54 may be used for SPDIFO.
PC/PCI grant input. Enable PC/PCI by setting PCI 50h [10:8] = 010. Select PCGNT# from pin 54
by setting Allegro_Base+58h [6] = 1. Either pin 54 or pin 63 may be used for PCGNT#.
Hardware volume control (volume down). Used in combination with pin 53 (VOLUP#). Hardware
volume control is enabled by setting PCI 52 [7] = 1. Pins 53:54 are selected for hardware volume
control by setting PCI 52h [5] = 0. Pins 44:45 may also be used for hardware volume control.
3.3V VAUX voltage supply input. If VAUX is not supported, then VAUX (pin 55) should be con-
nected to VCC and VAUXD (pin 62) should be pulled down.
4 SAM0368-030601
ESS Technology, Inc.

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