ISD-200 Datasheet, PDF (31/64 Pages) List of Unclassifed Manufacturers – USB Mass Storage Class Bulk-Only Specification Compliant

ISD-200 ASIC Datasheet
do_init
yes
INITIALIZE
flow diagram
Reset Device
assert ATA_NRESET for 50 ms
page 1 of 2
reset retry
Reset Recovery
deassert ATA_NRESET
wait for 3 ms
SKIP_BOOT
no
yes Device
Initialized
(pg 2)
Write Device Control with 00h
and wait for 3 ms
yes
SRST_ENABLE
no
Poll
ALT_STAT
BSY=0
no
DRQ=1
Init Timeout OR
BSY=0 & DRQ=0 OR
BSY=0 & DRQ=1
Init Timeout OR
BSY=DRQ=0
Write Device Control with 04h
and wait for 3 ms
Write Device Control with 00h
and wait for 3 ms
Slave
Master/Slave
Master
Poll ALT_STAT
no
Init Timeout OR
BSY=0 & DRQ=0 OR
BSY=0 & DRQ=1
Poll ALT_STAT
BSY=DRQ=0 OR
no
50ms Timeout
yes
Write Device Head with
"101"&DEV&"0000"
and wait for 500 ns
Initialization timeout OR
BSY=0 & DRQ=1
BSY=0 & DRQ=0
Attempt ECh (page 2)
In-System Design Confidential
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