ISD-200 Datasheet, PDF (39/64 Pages) List of Unclassifed Manufacturers – USB Mass Storage Class Bulk-Only Specification Compliant

ISD-200 ASIC Datasheet
The Cartridge Release bit is set when the device media is ejected.
The Eject Button Press bit is set when the eject button on the device is pressed.
The Eject Button Release bit is set when the eject button on the device is released.
Cylinder High –
The STATE0 vendor-specific field is combined with STATE1 specify state information to the
attached device.
Cylinder Low –
The STATE1 vendor-specific field is combined with STATE0 specify state information to the
attached device.
Normal Outputs
Register
Error
Sector Count
Sector Number
Cylinder Low
Cylinder High
Device/Head
Status
7
6
5
4
3
2
1
0
N/A
N/A
N/A
NSTATE0
NSTATE1
N/A
BSY N/A N/A N/A DRQ N/A N/A N/A
Cylinder High –
The NSTATE0 vendor-specific field is combined with NSTATE1 to communicate information
about the state of the device back to the host.
Cylinder Low –
The NSTATE1 vendor-specific field is combined with NSTATE0 to communicate information
about the state of the device back to the host.
Status register –
BSY shall be cleared to zero upon command completion.
DRQ shall be cleared to zero.
Error Outputs
If the device does not support this command, the device shall return command aborted. Otherwise, the
device shall not report an error.
Description
When this command is issued, the ISD-200 will wait until the device clears BSY and DRQ to zero before
beginning the input register writes. After writing the input registers, the ISD-200 waits for BSY and DRQ
cleared to zero and then reads the state information (NSTATE).
The event notification command is issued following every assertion of ATA_NRESET to the device and
following the POR device initialization sequence. The event notification command is also issued after any
of the events reported in the event notification data take place.
If any combination of mating events (mating events are defined as suspend/resume, cartridge insert/release,
eject press/release, and USB/class reset) take place before the ISD-200 can issue the event notification
command to the device, the following will occur:
1.
Send an event notification command showing all events.
2.
Send a subsequent event notification command showing only the most recent of any
mated events.
In-System Design Confidential
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