Led Driver Signals; Fc Differential Output; Fc Differential Input - Seagate SAVVIO 10K.5 FC ST9300605FC Product Manual

10.6.2

LED driver signals

Fault and Active LED signals are located in the FC-SCA connector (J1). See Table 31 for the output character-
istics of the LED drive signals.
Table 31: LED drive signal
State
LED off, high
LED on, low
10.6.3

FC Differential output

The serial output signal voltage characteristics are provided in Table 32. The outputs are not AC coupled in
order to deliver maximum signal without rise and fall time degradation. You must AC couple the receiver to iso-
late potentially different DC characteristics of the outputs and the receiver.
Table 32: FC Differential output characteristics
Description
Serial output voltage swing
Figure 16 provides the data output valid eye diagram relative to the bit cell time.
Figure 16. Transmit eye diagram
10.6.4

FC Differential input

The serial input signal voltage characteristics are provided in Table 33.
Table 33: FC Differential input characteristics
Description
Serial input voltage swing
76
Current drive available
0 < I < 100µA
OH
I < -30 mA
OL
Parameter
600 < V < 1300 mV
out
Bit Time
XMIT Eye
Parameter
200 < V < 1.300 mV
in
Output voltage
0 < V < 0.8V
OL
Notes
Centered at 1.32V
Savvio 10K.5 FC Product Manual, Rev. D
Notes
AC coupled