ES1988 PRODUCT BRIEF
Table 1 ES1988 Pin Descriptions (Continued)
Name
Pin Number
I/O
Description
PC_BEEP
PHONE
CD_L
64
65
I
PC Speaker input.
I
Mono input.
66
I
CD-audio input: left channel.
CD-audio input: ground.
CD-audio input: right channel.
Microphone input.
CD_GND
CD_R
67
I
68
I
MIC
69
I
LINE_IN_L
LINE_IN_R
AVDD[2:1]
AVSS[2:1]
VREF
70
I
Line input: left channel.
Line input: right channel.
Analog supply voltage, 5V.
Analog ground.
71
I
72, 83
73, 82
74
I
I
O
O
O
O
O
O
I
Reference voltage.
AFILT[2:1]
CAP[2:1]
LINE_OUT_L
LINE_OUT_R
MONO_OUT
RXD
75, 76
77, 78
79
Anti-aliasing filter cap for the ADC channel.
ADC and DAC reference caps.
Line output: left channel.
80
Line output: right channel.
Mono output.
81
MIDI receive data input. Enable MIDI I/O (MPU-401 I/O) by setting PCI 40h [3] = 1.
General purpose input/output.
84
85
GPIO1
I/O
O
I/O
TXD
MIDI transmit data output. Enable MIDI I/O (MPU-401 I/O) by setting PCI 40h [3] = 1.
General-purpose input/output.
GPIO2
(note)
If a pull down resistor is used on this pin, then pin 2 is enabled for multifunctionality (IDSEL,
RO#, SPDIFO, and PCREQ#). Otherwise, pin 2 may only be used for IDSEL.
RST#
INT#
86
87
88
91
92
I
O
I
PCI reset input.
Interrupt request output.
PCI bus clock input.
PCICLK
GNT#
REQ#
I
Bus master grant input.
Bus master request output.
O
ORDERING INFORMATION
Description
Package
Part Number
ES1988S
PCI Audio-Modem Accelerator
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.
ESS Technology, Inc. makes no representations or
warranties regarding the content of this document.
ESS Technology, Inc. assumes no responsibility for any
errors contained herein.
U.S. patents pending.
Allego is a registered trademark of ESS Technology, Inc.
All other trademarks are owned by their respective
holders and are used for identification purposes only.
ESS Technology, Inc.
48401 Fremont Blvd.
Fremont, CA 94538
Tel: (510) 492-1088
Fax: (510) 492-1898
All specifications are subject to change without prior
notice.
6
http://www.esstech.com
© 2001 ESS Technology, Inc. All rights reserved.
SAM0368-051302
ESS [ ESS Technology,Inc ]
