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Table 24: FC-SCA pin descriptions
Pin | Signal name | Signal type |
|
|
|
1* | Low Voltage TTL output | |
2* | 12 Volts |
|
|
|
|
3* | 12 Volts |
|
4* | 12 Volts |
|
|
|
|
5* |
| |
6* | Ground[1] |
|
7* | Active LED out | Open collector out |
8* | Reserved |
|
|
|
|
9* | Start_1[2] | TTL input |
10* | Start_2[2] | TTL input |
11* | Low Voltage TTL output | |
12* | SEL_6 | TTL input/output |
|
|
|
13* | SEL_5 | TTL input/output |
14* | SEL_4 | TTL input |
|
|
|
15* | SEL_3 | TTL input/output |
16* | Fault LED out | Open collector out |
|
|
|
17* | DEV_CTRL_CODE_2[2] | TTL input |
18* | DEV_CTRL_CODE_1[2] | TTL input |
19* | 5 Volts |
|
20* | 5 Volts |
|
|
|
|
Pin | Signal name | Signal type |
|
|
|
21 | 12 Volts charge |
|
22 | Ground |
|
|
|
|
23 | Ground |
|
24* | +Port A_in | FC Diff. input pair |
|
|
|
25* |
| |
26 | Ground |
|
|
|
|
27* | +Port B_in | FC Diff. input pair |
28* |
| |
|
|
|
29 | Ground |
|
30* | +Port A_out | FC Diff. output pair |
|
|
|
31* |
| |
32 | Ground |
|
|
|
|
33* | +Port B_out | FC Diff. output pair |
34* |
| |
|
|
|
35 | Ground |
|
36 | SEL_2 | TTL input/output |
|
|
|
37 | SEL_1 | TTL input/output |
38 | SEL_0 | TTL input/output |
|
|
|
39 | DEV_CTRL_CODE_0[2 | TTL input |
40 | 5 Volts charge |
|
|
|
|
*Short pins in mating backpanel connector.
[1]This pin may be connected to external logic to detect the presence of the drive. The drive connects this pin to the common ground.
[2]Pins 9, 10, 17, 18, and 39 are option select pins and are tied high by the drive circuitry. The preferred elec- trical connection at the backplane is either open or grounded (open for the ‘1’ setting, grounded for the ‘0’ setting). Alternatively, these pins may be driven by a 3.3V logic device, pulled up to 3.3V through a
12.5.5FC-AL transmitters and receivers
A typical
TX
Transmitter 100
TY
.01
Differential
Transfer Medium
.01
RX
Receiver 100
RY
Figure 15. FC-AL transmitters and receivers
Cheetah 15K.7 FC Product Manual, Rev. C | 67 |