ISD-200 ASIC Datasheet
In-System Design Confidential
i
Table of Contents
TABLE OF CONTENTS .............................................................................................................................. I
TABLE OF TABLES ................................................................................................................................. IV
TABLE OF FIGURES .................................................................................................................................V
DOCUMENT REVISION HISTORY ........................................................................................................ 6
PIN INFORMATION .................................................................................................................................. 7
OVERVIEW ............................................................................................................................................... 10
INTRODUCTION ...................................................................................................................................... 11
ISD-200 CONFIGURATION .................................................................................................................... 11
ISD-200 CONFIGURATION DATA AND USB DESCRIPTOR SOURCES.......................................................... 11
Internal ROM Contents ........................................................................................................................ 12
Serial ROM Interface ........................................................................................................................... 12
Vendor-Specific Identify (FBh) Data ................................................................................................... 12
ISD-200 CONFIGURATION/USB DESCRIPTOR DATA FORMATTING........................................................... 13
ISD-200 Configuration Data ................................................................................................................ 13
Valid Configuration Byte Settings........................................................................................................ 15
USB INTERFACE...................................................................................................................................... 16
DESCRIPTOR REQUIREMENTS .................................................................................................................... 16
Configuration Descriptors .................................................................................................................... 16
String Descriptor Indexes ..................................................................................................................... 16
Descriptor Override .............................................................................................................................. 17
PIPES ......................................................................................................................................................... 17
Default Control Pipe............................................................................................................................. 17
Bulk Out Pipe ....................................................................................................................................... 17
Bulk In Pipe.......................................................................................................................................... 17
Interrupt Pipe ........................................................................................................................................ 17
REQUESTS ................................................................................................................................................. 17
Standard Requests ................................................................................................................................ 17
Mass Storage Class Bulk-Only Requests.............................................................................................. 17
Vendor-Specific Requests .................................................................................................................... 18
DESCRIPTORS ............................................................................................................................................ 19
Supported Descriptors .......................................................................................................................... 19
Descriptor Data Format ........................................................................................................................ 20
ATA/ATAPI INTERFACE........................................................................................................................ 26
PROTOCOL................................................................................................................................................. 26
RESET MAPPING........................................................................................................................................ 26
DEVICE REQUIREMENTS............................................................................................................................ 27
ATA Power Supplied from the USB Bus .............................................................................................27
ATA Reset, A1h, FBh .......................................................................................................................... 27
ATA Polling Device ............................................................................................................................. 27
ISD-200 ATA Bus State During Idle.................................................................................................... 27
ATA PIO Support................................................................................................................................. 27
ATA INITIALIZATION TIMEOUT ................................................................................................................ 27
DEVICE INITIALIZATION SEQUENCE .......................................................................................................... 28
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