User Manual

SCSI Commands Reference Manual, Rev. J 450
www.seagate.com Parameters for direct access devices
5.3.30.2 Transceiver Controls Mode descriptors
Detail for the mode descriptor(s) for transceiver controls can be found in Table 420 and Table 421. Each field is defined below the
table. All supported link rates and controls shall be listed in page E5h.
Table 420 Transceiver Controls Mode descriptor (1.5Gb - 6Gb Link Rate)
Table 421 Transceiver Controls descriptor (12Gb Link Rate)
Bit
Byte
7 6 5 4 3 2 1 0
0 PHY IDENTIFIER
1 CONTROLLABLE LINK RATE
2 DRIVER STRENGTH CONTROL
3 DRIVER EMPHASIS CONTROL
4 DRIVER SLEW RATE CONTROL
5
MANUFACTURER DEFINE BYTES FOR TRANSMITTER CONTROL. . .
8
9 RECEIVER THRESHOLD CONTROL
10 RECEIVER EQUALIZATION GAIN CONTROL
11
MANUFACTURER DEFINE BYTES FOR RECEIVER CONTROL
12
13 INTERNAL RX EYE MARGIN RESET Reserved Reserved IREC
14 INTERNAL RX EYE HEIGHT
15 INTERNAL RX EYE WIDTH
Bit
Byte
7 6 5 4 3 2 1 0
0 PHY IDENTIFIER
1 CONTROLLABLE LINK RATE
2 C1 VALUE OF TX
3 C2 VALUE OF TX
4 C3 VALUE OF TX
5 Reserved RESET Reserved
IREC
COMPLETED
IREC
6 FFE COEFFICIENT 0 / INTERNAL RX EYE HEIGHT MARGIN
7 FFE COEFFICIENT 1 / INTERNAL RX EYE HEIGHT MARGIN
8 DFE COEFFICIENT 0
9 DFE COEFFICIENT 1
10 DFE COEFFICIENT 2
11 DFE COEFFICIENT 3
12 DFE COEFFICIENT 4
13 HOST C1 RELATIVE VALUE
14 HOST C2 RELATIVE VALUE
15 HOST C3 RELATIVE VALUE