Sense data, A-17, Valid – Epson GT-6500 EN User Manual
Page 179
Sense Data
The extension sense data format is used for the sense data
created when an error occurs. This format is described below.
Bit
Byte
7
6
5
4
3
2
1
0
0
Valid
Error class (7)
Error code (0)
1
Segment data number (0)
2
File mark
EOM
ILI
Reserved
Sense keys
3
Information byte (MSB)
4
Information byte
5
Information byte
6
Information byte (LSB)
7
Additional sense byte (0)
Following is a description of the individual bits and bytes.
Valid:
When set to 0, this bit indicates that the data in the data byte is
invalid. When set to 1, the data is valid.
ILI:
This is the illegal length bit. When set to 1, this bit indicates
that the transfer length or assigned length specified with a
command is not the same as the actual data length required
by the scanner.
Interface Specifications
A-17