Seagate CHEETAH ST34501FC - Manual (Page 27)

Cheetah 4LP FC Installation Guide, Rev. B 25
Table 1: FC-SCA pin descriptions
Pin/contact Signal name Signal type
1* –EN bypass port A TTL output
2* 12 Volts
3* 12 Volts
4* 12 Volts
5* –Parallel ESI TTl output
6* Ground (-DRV present)
7* Active LED out Open collector out
8* Reserved
9* RMT_start TTL input
10* DLYD_start TTL input
11* –EN bypass port B TTL output
12* SEL_6 TTL input
13* SEL_5 TTL input
14* SEL_4 TTL input
15* SEL_3 TTL input
16* Fault LED out Open collector out
17* Reserved NC TTL input
18* Reserved NC
19* 5 Volts
20* 5 Volts
21 12 Volts charge
22 Ground
23 Ground
24* +Port A_in Diff. PECL input pair
25* –Port A_in