Drive Activity Remote Led Signal Status - Seagate ST336706LW Product Manual

Cheetah 36ES Product Manual, Rev. A
Table 17: Disc drive SCSI timing (Continued)
Description
Data In Byte Transfer (parameter)
Data Out Byte Transfer (parameter)
Next Data In Byte Access (parameter)
Next Data Out Byte Access (parameter)
Data In Byte Transfer (media) [2]
Data Out Byte Transfer (media) [2]
Next Data In Byte access (media [2]
Next Data Out Byte access (media [2]
MSG IN Byte Transfer
MSG OUT Byte Transfer
STATUS Byte Transfer
Synchronous Data Transfer Characteristics:
Request Signal Transfer Period [3]
Notes.
[1] See the SCSI Interface Product Manual, part number 75789509, Timing examples section.
[2] Maximum SCSI asynchronous interface transfer rate is given in Section 4.2.3 of this manual.
[3] Synchronous Transfer Period is determined by negotiations between an Initiator and a Drive. The Drive is
capable of setting periods as given in Section 9.5. See also the Synchronous data transfer section and the
Extended messages section of the SCSI Interface Product Manual, for a description of synchronous data
transfer operation.
9.11

Drive activity remote LED signal status

The following table provides drive activity remote LED signal status.
Note. There is no drive activity LED mounted on the drive PCBA.
Customer may install an activity LED across pins 11 & 12 of J6. See Figure 13.
Table 18: Drive activity remote LED signal status
Spindle status
Spinning up with DC power applied
Spun down
Powered down by removal of DC power N/A
Spun up
Spun down
Spun down
Spun down
Spun down
Spun up
Spun up
Spun up
Spun up
Spun up
Spun up
Waveform
symbol [1]
T24
T25
T26
T27
T28
T29
T30
T31
T32
T33
T34
–
Command status
N/A
Start Unit
Stop Unit
No command activity
Write/Read Buffer
SCSI Bus Reset
Test Unit Ready
No command activity
Write/Read
SCSI Bus Reset
Test Unit Ready
Format with Immediate option on On while the command is initially processed
Format without Immediate
Waveform
table [1] Typical timing
4.5-12 0.04 s
4.5-13 0.04 s
4.5-12 0.12 s
4.5-13 0.12 s
4.5-12 0.04 s
4.5-13 0.04 s
4.5-12 0.12 s
4.5-13 0.12 s
4.5-5,7,8,14,15 0.04 s
4.5-2 0.04 s
4.5-5,8,15 0.04 s
– various (800 ns max)
Remote LED signal status
On until spinup is complete
On while processing the command
Off due to absence of power
On while processing the command
Off
On while processing the command
On while processing the reset
On while processing the command
Off
On while processing the command
On while processing the reset
On while processing the command
LED toggles on/off on each cylinder boundary
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