Sscl Command Phases; Sscl Interface Phases - Spectra Logic Spectra 10000 User Manual

10kdev_.book Page 4 Friday, March 12, 1999 9:44 AM

SSCL Command Phases

The SSCL architecture defines five phases or operating modes, described in the following
table. Each phase is distinct and mutually exclusive.
Phase
Code
0
1
2
3
4

SSCL Interface Phases

Four SSCL operating parameters are monitored. These phases of the parameters indicate
the current state of the SSCL interface. The first three parameters, n1, n2, and n3, can
be in any of one of the five phases or modes. The fourth parameter,n4, cover/beeper
status, is a hexadecimal value from 0h to Fh. See
more information.
•
serial port status, n1
•
front panel status, n2
•
SCSI port status, n3
•
cover/beeper status, n4
The library returns the phases of the operating parameters when queried by the host or
an operator. Issue an ASCII control code to see the phases of the four operating
parameters (s
Chapter 1
Phase Definition
Idle phase Unit is idle, waiting for
Command phase Expecting a command
Issue phase Processing a command
Data phase Sending data to the host computer if necessary
Initialization phase Power up, self-test initialization, limited number of
commands accepted
on page 13 for more information).
SYN
on page 13 for