ETC ES1938

ES1938
PCI AudioDrive® Solution
Product Brief
ESS Technology, Inc.
DESCRIPTION
FEATURES
The ES1938 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.
• 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:
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.
•
• Dynamic range (SNR) over 80 dB
• Integrated Spatializer 3D VBX stereo audio effects processor
The ES1938 provides a serial EEPROM interface for ease of
programming the Subsystem ID and Subsystem Vendor ID.
The ES1938 integrates the ESS Technology field-proven
hardware design for DOS game compatibility with hardware FM
synthesis (ESFM 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.
Transparent DMA (TDMA) is compatible with the
IntelPentium, Pentium II, and Celeron™ 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
ESFM synthesizer has extended capabilities within native mode
operation providing superior sound and power-down capabilities.
The ES1938 also incorporates Spatializer VBX 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 3D
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 low-profile quad flat
pack (LQFP) package.
–– TDMA
–– DDMA
–– PC/PCI
High-quality ESFM music synthesizer
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 SoundBlasterTM and
SoundBlaster ProTM
• Meets PC 98 / PC 99 and WHQL specifications
ESS Technology, Inc.
SAM0290-030601
1
ES1938 PRODUCT BRIEF
BLOCK DIAGRAM
Figure 1 shows the ES1938 block diagram.
MIC
LINE_L
LINE_R
AUXA_L
AUXA_R
AUXB_L
AUXB_R
MONO_IN
ANALOG SUBSYSTEMS
RECORDING
SOURCE
AND INPUT
VOLUME
CONTROL
STEREO
PROGRAMMABLE
MIXER
REF GEN
CAP3D
3D PROCESSOR*
FOUT_L
FOUT_R
16-BIT STEREO
GAME DAC/ADC
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
AOUT_L
AOUT_R
MONO_OUT
SWITCHED
CAPACITOR
LOW-PASS FILTER
CMR
VDDA
GNDA
PCSPKI
PCSPKO
OUTPUT VOLUME
AND MUTE CONTROL
RECORD MONITOR
CIN_L
CIN_R
16-BIT STEREO
MUSIC DAC
16-BIT STEREO
SYSTEM DAC
HARDWARE
VOLUME
CONTROL
VOLDN
VOLUP
ESFM FM MUSIC
SYNTHESIZER
SID AND SVID
CONFIGURATION
PCI BUS
INTERFACE
WAVETABLE
SERIAL PORT
MCLK
MSD
MPU-401 SERIAL
PORT AND FIFOs
MSI
MSO
DUAL
GAME PORT
ROM
AND
RAM
MICROCONTROLLER
CLOCK
GENERATOR
AND TIMER
SW(A-D)
T(A-D)
* 3D Processor uses Spatializer VBX 3D
technology provided by Desper Products, Inc. a
subsidiary of Spatializer Audio Laboratories, Inc.
XI
XO
Figure 1 ES1938 Block Diagram
PINOUT
A D2 5
AD26
A D2 7
A D2 8
A D2 9
A D3 0
AD31
REQB
GN TB
P CL K
P RS T B
V DDD
CL K RUNB
PCPCIGNTB
P CP CI RE Q B
I NT A B
NC
NC
SIRQ
MSI
MSO
P CS P K I
P CS P K O
GN DD
A OU T_ R
Figure 2 shows the ES1938 pinout diagram.
AD24
CBE3B
IDSEL
AD23
VDDD
GNDD
AD22
AD21
AD20
AD19
AD18
AD17
AD16
CBE2B
FRAMEB
IRDYB
TRDYB
DEVSELB
STOPB
LOCKB
PAR
CBE1B
AD15
AD14
GNDD
75
76
51
50
ES 1938S
100-Pin LQFP
100
26
25
V DDD
A D1 3
A D1 2
A D1 1
A D1 0
A D9
A D8
CB E 0 B
A D7
A D6
A D5
A D4
A D3
A D2
A D1
A D0
V DDD
XO
XI
V OL DN
VOLUP
M CL K
MSD
G NDD
M O NO_ OU T
1
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
Figure 2 ES1938 Pinout Diagram
2
SAM0290-030601
ESS Technology, Inc.
ES1938 PRODUCT BRIEF
ES1938 PIN DESCRIPTIONS
Table 1 lists the ES1938 pin descriptions.
Table 1 ES1938 Pin Descriptions
Names
Pin Numbers
I/O
VDDD
1, 17, 64, 80
I
AD[31:0]
2:7, 9:16,
69:76, 79,
82:88, 98:99
I/O
Address and data lines from the PCI bus.
CBE[3:0]B
8, 77, 89, 97
I/O
PCI command/byte enable.
XO
18
O
Oscillator output. Connect to external 14.318-MHz crystal.
XI
19
I
Oscillator/external clock input. Connect to external 14.318-MHz crystal or clock source
(must be CMOS levels).
VOLDN
20
I
Active-low volume decrease button input with internal pull-up.
VOLUP
21
I
Active-low volume increase button input with internal pull-up.
MCLK
22
I
Input with internal pull-down. Music serial clock from external wavetable music synthesizer.
MSD
23
I
Input with internal pull-down. Music serial data from external wavetable music synthesizer.
24, 52, 81,
100
I
Digital ground.
MONO_OUT
25
O
Mono output with source select and volume control (including mute). This pin can drive an
external 5k AC load.
MONO_IN
26
I
Mono input to mixer and ADC. This pin has an internal pull-up to CMR.
T(A-D)
30:27
I/O
SW(A-D)
31:34
I
Active-low joystick switch setting inputs. These SW pins have an internal pull-up resistor.
AUXB_L,
AUXB_R
35, 36
I
Auxiliary B inputs, left and right. AUXB_L and AUXB_R have internal pull-up resistors to
CMR.
AUXA_L,
AUXA_R
37, 38
I
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.
CMR
39
O
Common mode reference voltage (2.25V±5%). Bypass this pin to analog ground with
47-µF electrolytic in parallel with a 0.1-µF capacitor.
MIC
40
I
Microphone input. MIC has an internal pull-up resistor to CMR.
GNDA
41
I
Analog ground.
CAP3D
42
I
Bypass capacitor to analog ground for 3D effects.
VDDA
43
I
Analog supply voltage (5V±5%). Must be greater than or equal to VDDD –0.3V.
FOUT_R,
FOUT_L
44, 45
O
Filter outputs, left and right. AC-coupled externally to CIN_L and CIN_R to remove DC
offsets.
CIN_L, CIN_R
46, 47
I
ADC and first channel DAC mixer inputs. These pins have internal 50k pull-up resistors to
CMR.
LINE_L, LINE_R
48, 49
I
Line inputs, left and right. LINE_L and LINE_R have internal pull-up resistors to CMR.
AOUT_L,
AOUT_R
50, 51
O
Line-level stereo outputs, left and right. These pins can drive a 5k ohm AC load.
GNDD
ESS Technology, Inc.
Descriptions
Digital supply voltage (5V±5%).
Joystick timer. These pins connect to the X-Y positioning variable resistors for the two
joysticks.
SAM0290-030601
3
ES1938 PRODUCT BRIEF
Table 1 ES1938 Pin Descriptions (Continued)
Names
Pin Numbers
I/O
PCSPKO
53
O
Analog output of PCSPKI with volume control.
PCSPKI
54
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.
MSO
55
O
MIDI serial data output.
MSI
56
I
MIDI serial input. Schmitt trigger input with internal pull-up resistor. Either MPU-401 or
SoundBlaster formats.
SIRQ
57
I/O
Serialized IRQ. (Optional motherboard implementation.)
58, 59
—
Reserved.
INTAB
60
O
PCI interrupt request.
PCPCIREQB
61
O
PC/PCI serialized DREQ output. (Optional motherboard implementation.)
PCPCIGNTB
62
I
PC/PCI serialized DACK input optional motherboard implementation.
CLKRUNB
63
I/O
PRSTB
65
I
PCI reset.
PCLK
66
I
PCI clock. This clock times all PCI transactions.
GNTB
67
I
PCI busmaster grant.
REQB
68
O
PCI busmaster request, tri-state output.
IDSEL
78
I
PCI device select for configuration.
FRAMEB
90
I/O
PCI cycle frame.
IRDYB
91
I/O
PCI initiator ready.
TRDYB
92
I/O
PCI target ready.
DEVSELB
93
I/O
PCI device select.
STOPB
94
I/O
PCI stop transaction.
LOCKB
95
I/O
PCI lock.
PAR
96
I/O
PCI parity.
NC
Descriptions
PCI clock state for power management.
ORDERING INFORMATION
Description
Part Number
ES1938S
PCI AudioDrive
ESS Technology, Inc.
48401 Fremont Blvd.
Fremont, CA 94538
Tel: (510) 492-1088
Fax: (510) 492-1898
4
Package
100-pin LQFP
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.
(P) U.S. patents pending.
ESS Technology, Inc. makes no representations or
warranties regarding the content of this document.
All specifications are subject to change without prior
notice.
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.
ESS Technology, Inc. assumes no responsibility for any
errors contained herein.
All other trademarks are owned by their respective
holders and are used for identification purposes only.
AudioDrive is a registered trademark of ESS Technology,
Inc.
ESFM is a trademark of ESS Technology, Inc.
© 2001 ESS Technology, Inc. All rights reserved.
SAM0290-030601