70
Cheetah 15K.6 FC Product Manual, Rev. C
Table 27:
FC-SCA pin descriptions
*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 pull-up
resistor (recommended size of 10k ohm), or grounded through some other means.
9.5.5
FC-AL transmitters and receivers
A typical FC-AL differential copper transmitter and receiver pair is shown in Figure 17. The receiver is required
to provide the AC coupling to eliminate ground shift noise.
Figure 17. FC-AL transmitters and receivers
Pin
Signal name
Signal type
Pin
Signal name
Signal type
1*
-EN bypass port A
Low Voltage TTL output
21
12 Volts charge
2*
12 Volts
22
Ground
3*
12 Volts
23
Ground
4*
12 Volts
24*
+Port A_in
FC Diff. input pair
5*
-Parallel ESI
25*
-Port A_in
6*
Ground
[1]
26
Ground
7*
Active LED out
Open collector out
27*
+Port B_in
FC Diff. input pair
8*
Reserved
28*
-Port B_in
9*
Start_1
[2]
TTL input
29
Ground
10*
Start_2
[2]
TTL input
30*
+Port A_out
FC Diff. output pair
11*
-EN bypass port B
Low Voltage TTL output
31*
-Port A_out
12*
SEL_6
TTL input/output
32
Ground
13*
SEL_5
TTL input/output
33*
+Port B_out
FC Diff. output pair
14*
SEL_4
TTL input
34*
-Port B_out
15*
SEL_3
TTL input/output
35
Ground
16*
Fault LED out
Open collector out
36
SEL_2
TTL input/output
17*
DEV_CTRL_CODE_2
[2]
TTL input
37
SEL_1
TTL input/output
18*
DEV_CTRL_CODE_1
[2]
TTL input
38
SEL_0
TTL input/output
19*
5 Volts
39
DEV_CTRL_CODE_0
[2
TTL input
20*
5 Volts
40
5 Volts charge
TY
.01
Differential
Transfer Medium
.01
Transmitter
TX
RY
Receiver
RX
100
100
Содержание Cheetah 15K.6 FC ST3146356FC
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Страница 34: ...28 Cheetah 15K 6 FC Product Manual Rev C Figure 1 Typical ST3450856FC current profiles...
Страница 35: ...Cheetah 15K 6 FC Product Manual Rev C 29 Figure 2 Typical ST3450056FC current profiles...
Страница 36: ...30 Cheetah 15K 6 FC Product Manual Rev C Figure 3 Typical ST3300656FC current profiles...
Страница 37: ...Cheetah 15K 6 FC Product Manual Rev C 31 Figure 4 Typical ST3300056FC current profiles...
Страница 38: ...32 Cheetah 15K 6 FC Product Manual Rev C Figure 5 Typical ST3146356FC current profiles...
Страница 39: ...Cheetah 15K 6 FC Product Manual Rev C 33 Figure 6 Typical ST3146756FC current profiles...
Страница 45: ...Cheetah 15K 6 FC Product Manual Rev C 39 Figure 11 Recommended mounting Z Y X Z Y X...
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