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Quantum Audio STT3401A Manuel D’Utilisation

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ATAPI Interface 
Chapter 5 
Seagate Travan 40 Product Manual 
Page 111 
 
 
SLEEP (ATA Command E6) 
This command provides the only way for the device to enter Sleep mode. 
It causes the device to set the BSY bit to one, prepare to enter Sleep mode, clear the 
BSY bit to 0 and assert INTRQ. The Host shall read the Status register in order to 
clear the interrupt and allow the device to enter Sleep mode. In Sleep mode, the 
interface becomes inactive without affecting the operation of the interface. The Host 
shall not attempt to access the Command Block registers while the device is in Sleep 
mode. 
Because some Host systems may not read the Status register and clear the 
interrupt, a device may automatically de-assert INTRQ and enter Sleep mode after a 
vendor specific time period of not less that 2 seconds. The only way to recover from 
Sleep mode is with a SOFTWARE RESET (SRST), a HARDWARE RESET, or a 
DEVICE RESET command. 
A device shall not power on in Sleep mode nor remain in Sleep mode following a 
reset sequence. 
Host Taskfile Registers—Inputs 
 
Data Bits 
Host Taskfile 
Register 
7 
6 
5 
4 
3 
2 
1 
0 
HEX 
Features 
N/A 
N/A 
Sector Count 
N/A 
N/A 
Sector Number 
N/A 
N/A 
Byte Count 
High 
N/A 
N/A 
Byte Count 
Low 
N/A 
N/A 
Device/Head 
Rsvd 
LBA 
rsvd 
DEV 
SAM LUN (not used) 
 
Command 
command 
E6 
 
Host Taskfile Registers—Outputs 
 
Data Bits 
Host Taskfile 
Register 
7 
6 
5 
4 
3 
2 
1 
0 
HEX 
Error 
Rsvd 
tag type (not supported) 
MCH 
ABRT 
EOM 
ILI 
00 
Sector Count 
N/A 
N/A 
Sector Number 
N/A 
N/A 
Byte Count 
High 
N/A 
 
Byte Count 
Low 
N/A 
 
Device/Head 
Rsvd 
LBA 
rsvd 
DEV 
SAM LUN (not used) 
 
Status 
BSY 
RDY 
rsvd 
DSC 
DRQ 
Corr 
rsvd 
CHK 
40 or 50