Text preview for : ESS1938.pdf part of ESS ESS1938 ESS1938 PC audio
Back to : ESS1938.pdf | Home
ES1938 PCI AudioDrive® Solution Product Brief
DESCRIPTION
The ES1938 TM PCI AudioDrive® solution implements a single-chip PCI audio solution, providing high-quality audio processing while maintaining full legacy DOS game compatibility. With a dynamic range over 80 dB, the ES1938 complies with the Microsoft® PC 98 / PC 99 specifications and meets WHQL audio requirements. The ES1938 forms a complete audio subsystem on a single chip for motherboard platforms. The ES1938 incorporates a microcontroller, ESFMTM music synthesizer, 16-bit stereo wave ADC and DAC, 16-bit stereo music DAC, MPU-401 UART mode serial port, dual game port, hardware master volume control, a serial port interface to external wavetable music synthesizer, DMA control logic with FIFO, and PCI bus interface logic. There are three stereo inputs (typically line-in, CD audio, and auxiliary line) and a mono microphone input. he ES1938 provides a serial EEPROM interface for ease of programming the Subsystem ID and Subsystem Vendor ID. The ES1938 integrates ESS' field-proven hardware design for DOS game compatibility with hardware FM synthesis (ESFMTM synthesis) and three methods for legacy audio control interface: PC/PCI, Distributed DMA, and Transparent DMA. Transparent DMA requires no sideband signals from PC core logic chipsets in addition to the standard PCI 2.2 bus. TDMA is compatible with the Intel® Pentium®, Pentium II®, and CeleronTM chipsets as well as standard PCI add-in cards. The ES1938 can record, compress, and play back voice, sound, and music with built-in mixer controls. It supports stereo full-duplex operation for simultaneous record and playback. The ESFMTM synthesizer has extended capabilities within native mode operation providing superior sound and power-down capabilities. The ES1938 also incorporates Spatializer® VBXTM technology, provided by Desper Products, Inc., a subsidiary of Spatializer Audio Laboratories, Inc. This processor expands the stereo sound field emitted by two speakers to create a resonant 3-D sound environment. The ES1938 is compliant with Advanced Power Management (APM) 1.2, Advanced Configuration and Power Interface (ACPI) 1.0, and PCI Power Management Interface (PPMI) 1.0. It is available in an industry-standard 100-pin Thin Quad Flat Pack (TQFP) package.
FEATURES
· Single, high-performance, mixed-signal, 16-bit stereo VLSI chip · PCI parallel bus interface, revision 2.2 · Full native DOS games compatibility, via three technologies:
TDMA DDMA PC/PCI High-quality ESFMTM music synthesizer
· · Dynamic range (SNR) over 80 dB · Integrated Spatializer® 3-D VBXTM stereo audio effects
processor provided by Desper Products, Inc. a subsidiary of Spatializer Audio Laboratories, Inc.
Record and Playback Features
· Record, compress, and play back voice, sound, and music · 16-bit stereo ADC and DAC · Programmable independent sample rates from 6 kHz up to
48 kHz for record and playback
· Full-duplex operation for simultaneous record and playback · 2-wire hardware volume control for up, down, and mute
Inputs and Outputs
· Stereo inputs for line-in, auxiliary A (CD audio), and auxiliary B,
and a mono input for microphone
· MPU-401 (UART mode) interface for wavetable synthesizers
and MIDI devices
· Integrated dual game port · Separate mono input (MONO_IN) and mono output
(MONO_OUT) for speakerphone
Mixer Features
· 7-channel mixer with stereo inputs for line, CD audio, auxiliary
line, music synthesizer, digital audio (wave files), and mono inputs for microphone and speakerphone
· Programmable 6-bit logarithmic master volume control
Power
· Advanced power management meets APM 1.2, ACPI 1.0, and
PPMI 1.0 standards
Compatibility
· Supports PC games and applications for Sound BlasterTM and
Sound BlasterTM Pro
· Supports Microsoft® WindowsTM Sound System® · Meets PC 98 / PC 99 and WHQL specifications
ESS Technology, Inc.
SAM0290-122399
1
ES1938 PRODUCT BRIEF
BLOCK DIAGRAM
MIC LINE_L LINE_R AUXA_L AUXA_R AUXB_L AUXB_R MONO_IN CMR VDDA GNDA CAP3D PCSPKI PCSPKO ANALOG SUBSYSTEMS RECORDING SOURCE AND INPUT VOLUME CONTROL STEREO PROGRAMMABLE MIXER OUTPUT VOLUME AND MUTE CONTROL RECORD MONITOR AOUT_L AOUT_R MONO_OUT
SWITCHED CAPACITOR LOW-PASS FILTER
16-BIT STEREO GAME DAC/ADC 16-BIT STEREO MUSIC DAC 16-BIT STEREO SYSTEM DAC HARDWARE VOLUME CONTROL ESFMTM FM MUSIC SYNTHESIZER
REF GEN
FOUT_L FOUT_R CIN_L CIN_R
3-D PROCESSOR* PC SPEAKER VOLUME CTRL
DATA BUFFER WITH 256 BYTE FIFO AD[31:0] INTAB SIRQ PCLK PRSTB CBE[3:0]B PAR FRAMEB IRDYB TRDYB STOPB IDSEL DEVSELB REQB GNTB LOCKB CLKRUNB PCPCIREQB PCPCIGNTB
VOLDN VOLUP
SID AND SVID CONFIGURATION PCI BUS INTERFACE WAVETABLE SERIAL PORT MPU-401 SERIAL PORT AND FIFOs DUAL GAME PORT ROM AND RAM CLOCK GENERATOR AND TIMER MCLK MSD MSI MSO SW(A-D) T(A-D) XI XO
MICROCONTROLLER
* 3-D Processor uses Spatializer® VBXTM 3-D technology provided by Desper Products, Inc. a subsidiary of Spatializer Audio Laboratories, Inc.
PINOUT
AD25 AD26 AD27 AD28 AD29 AD30 AD31 REQB GNTB PCLK PRSTB VDDD CLKRUNB PCPCIGNTB PCPCIREQB I N TA B NC NC SIRQ MSI MSO PCSPKI PCSPKO GNDD AOUT_R
AD24 CBE3B I DSEL AD23 VDDD GNDD AD22 AD21 AD20 AD19 AD18 AD17 AD16 CBE2B FRAMEB IRDYB TRDYB DEVSELB STOPB L OCKB PA R CBE1B AD15 AD14 GNDD
75 76 51 50
ES1938S
100 1
26 25
AOUT_L LINE_R LINE_L CIN_R CIN_L FOUT_L FOUT_R VDDA CAP3D GNDA MIC CMR AUXA_R AUXA_L AUXB_R AUXB_L SWA SWB SWC SWD TA TB TC TD MONO_IN
2
SAM0290-122399
VDDD AD13 AD12 A D 11 AD10 AD9 AD8 CBE0B AD7 AD6 AD5 AD4 AD3 AD2 AD1 AD0 VDDD XO XI VOLDN VOLUP MCLK MSD GNDD MONO_OUT
ESS Technology, Inc.
ES1938 PRODUCT BRIEF
PIN DESCRIPTION
Name VDDD AD[31:0] Number 1, 17, 64, 80 I/O Description I Digital supply voltage (5 V ± 5%).
6976, 79, I/O Address and data lines from the PCI bus. 8288, 9899, 27, 916 77, 89, 97, 8 18 19 20 21 22 23 24, 52, 81, 100 25 26 30:27 34:31 35, 36 37, 38 39 40 41 42 43 44, 45 46, 47 48, 49 50, 51 53 54 55 56 57 60 61 62 63 65 66 67 68 78 90 91 92 93 94 95 96 58,59 I/O PCI command/byte enable. O Oscillator output. Connect to external 14.318 MHz crystal. I I I I I I I I I I Oscillator/external clock input. Connect to external 14.318 MHz crystal or clock source (must be CMOS levels). Active-low volume decrease button input with internal pull-up. Active-low volume increase button input with internal pull-up. Input with internal pull-down. Music serial clock from external wavetable music synthesizer (ES692). Input with internal pull-down. Music serial data from external wavetable music synthesizer (ES692). Digital ground. Mono input to mixer and ADC. This pin has an internal pull-up to CMR. Active-low joystick switch setting inputs. These SW pins have an internal pull-up resistor. Auxiliary B inputs, left and right. AUXB_L and AUXB_R have internal pull-up resistors to CMR. Auxiliary A inputs, left and right. AUXA_L and AUXA_R have internal pull-up resistors to CMR. Normally intended for connection to an internal or external CD-ROM analog output.
CBE[3:0]B XO XI VOLDN VOLUP MCLK MSD GNDD MONO_OUT MONO_IN T(A-D) SW(A-D) AUXB_L, AUXB_R AUXA_L, AUXA_R CMR MIC GNDA CAP3D VDDA FOUT_R, FOUT_L CIN_L, CIN_R LINE_L, LINE_R AOUT_L, AOUT_R PCSPKO PCSPKI MSO MSI SIRQ INTAB PCPCIREQB PCPCIGNTB CLKRUNB PRSTB PCLK GNTB REQB IDSEL FRAMEB IRDYB TRDYB DEVSELB STOPB LOCKB PAR NC
O Mono output with source select and volume control (including mute). This pin can drive an external 5k AC load. I/O Joystick timer pins. These pins connect to the X-Y positioning variable resistors for the two joysticks.
O Common mode reference voltage (2.25 V ± 5%). Bypass this pin to analog ground with 47 µF electrolytic in parallel with a .1 µF capacitor. I I I I I I Microphone input. MIC has an internal pull-up resistor to CMR. Analog ground. Bypass capacitor to analog ground for 3-D effects. Analog supply voltage (5 V ± 5%). Must be greater than or equal to VDDD-0.3 V. ADC and first channel DAC mixer inputs. These pins have internal 50k pull-up resistors to CMR. Line inputs, left and right. LINE_L and LINE_R have internal pull-up resistors to CMR.
O Filter outputs, left and right. AC-coupled externally to CIN_L and CIN_R to remove DC offsets.
O Line-level stereo outputs, left and right. These pins can drive a 5k ohm AC load. O Analog output of PCSPKI with volume control. I Normally low digital PC speaker signal input. This signal is converted to an analog signal with volume control and appears on analog output PCSPKO. MIDI serial input. Schmitt trigger input with internal pull-up resistor. Either MPU-401 or Sound Blaster formats.
O MIDI serial data output. I I/O Serialized IRQ. (Optional motherboard implementation.) O PCI interrupt request. O PC/PCI serialized DREQ output. (Optional motherboard implementation.) I I I I I PC/PCI serialized DACK input. (Optional motherboard implementation.) PCI reset. PCI clock. This clock times all PCI transactions. PCI busmaster grant. PCI device select for configuration. I/O PCI clock state for power management.
O PCI busmaster request, tristate output. I/O PCI cycle frame. I/O PCI initiator ready. I/O PCI target ready. I/O PCI device select. I/O PCI stop transaction. I/O PCI lock. I/O PCI parity. Reserved.
ESS Technology, Inc.
SAM0290-122399
3
ES1938 PRODUCT BRIEF
MAXIMUM RATINGS
Rating Analog supply voltage Digital supply voltage Input voltage Operating temperature range Storage temperature range Symbol VDDA VDDD VIN TA TSTG Value -0.3 to 7.0 V -0.3 to 7.0 V -0.3 to 7.0 V 0 to 70 °C -50 to 125 °C
TYPICAL APPLICATION
PCI Bus
+12 V +5 V GND VDDA GNDA AUXA_L AUXA_R AUXB_L AUXB_R LINE_L LINE_R MONO_IN CD In Left CD In Right AuxB In Left AuxB In Right Line In Left Line In Right Mono In Mic In
ES1938
78L05 Regulator VDDD GNDD PRSTB PCLK GNTB IDSEL FRAMEB TRDYB STOPB + +
ANALOG CHARACTERISTICS
Parameter Analog supply voltage Reference voltage Input impedance Pins VDDA CMR LINE_L, LINE_R, AUXA_ L, AUXA_R, AUXB_L, AUXB_R, MIC CIN_L, CIN_R FOUT_L, FOUT_R Output impedance AOUT_L, AOUT_R max load for full-scale output MIC preamp ON preamp OFF Input voltage LINE_L, LINE_R, AUXA_L, AUXA_R, AUXB_L, AUXB_R 3.4 26 35 3.5 10 Min 4.75 Typ 5.0 2.25 125 Max 5.25 Unit V V
4 32
k
50 5
65 6.5
k k k
PAR MIC LOCKB REQB AOUT_L DEVSELB AOUT_R IRDYB AD[31:0] MONO_OUT PCSPKO CEB[3:0]B CLKRUNB INTAB FOUT_L CIN_L FOUT_R CIN_R SIRQ PCPCIGNTB PCPCIREQB
To Stereo Amplifier
MSI MSO SWA SWB SWC SWD
150 2.8 3.4
mVp-p Vp-p Vp-p
Sideband Connector
PC/PCI MB Implementation UP
Hardware Volume
VOLUP VOLDN TA TB TC XI XO TD
DOWN
AOUT_L, AOUT_R Output voltage full-scale output Gain Mic preamp
Vp-p
From Timer Chip PCSPKI
dB
14.31818 MHz
DIGITAL CHARACTERISTICS
Symbol Parameters VDDD VIH1 Digital supply voltage Input high voltage: All inputs except MSD, MCLK, SW(A-D), VOLUP, VOLDN Input high voltage: MSD, MCLK Input high voltage: SW(A-D), VOLUP, VOLDN Input low voltage: All inputs except MSD, MCLK, SW(A-D), VOLUP, VOLDN Input low voltage: MSD, MCLK Input low voltage: SW(A-D), VOLUP, VOLDN Output high voltage Output low voltage Min 4.75 2.2 Max 5.25 VDDD + 0.5 VDDD + 0.5 VDDD + 0.5 1.0 Unit Conditions V V VDDD = max
+ CMR Game Port CAP3D
BUNDLED SOFTWARE AND DRIVERS
2.6 4.1 -0.5 V V V VDDD = max VDDD = max VDDD = min
VIH2 VIH3 VIL1
· AudioRackTM · Device Drivers for:
Microsoft Windows®95 / Windows®98 Microsoft WindowsTM NT 4.0
VIL2 VIL3 VOH VOL
-0.5 -0.5 2.4
1.0 1.1
V V V
VDDD = min VDDD = min VDDD = max IOH = -3 mA VDDD = min IOL = 6 mA
SERVICE AND SUPPORT
· Evaluation Kit · Manufacturing Kit · Reference Design
(P) U.S. Patent 4,384,169 and others, other patents pending. AudioDrive® is a registered trademark of ESS Technology, Inc. ESFMTM, and AudioRackTM are trademarks of ESS Technology, Inc. Certain audio features of this product manufactured under a license from Desper Products, Inc., Spatializer® and the circle-in-square device are trademarks owned by Desper Products, Inc. U. S. Patent numbers #4,308,423, #4,355,203, #5,412,731. All other trademarks are owned by their respective holders and are used for identification purposes only.
0.4
V
No part of this publication may be reproduced, stored in a retrieval system, transmitted, or translated in any form or by any means, electronic, mechanical, manual, optical, or otherwise, without the prior written permission of ESS Technology, Inc. ESS Technology, Inc. makes no representations or warranties regarding the content of this document. All specifications are subject to change without prior notice. ESS Technology, Inc. assumes no responsibility for any errors contained herein.
4
© 1999 ESS Technology, Inc. All rights reserved.
SAM0290-122399