Supero SC836E1 - R800V(B), Руководство пользователя

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2-2
B ackplan e User ' s Gu ide
2-2 Front Connector and Pin Defi nitions
#1. CD-ROM/Floppy 4-Pin Connectors
T h e 4 - p i n conn e cto rs , desi gnat ed JP 10 5
an d JP 106 , p r ov ide pow er to th e C D -R O M
an d floppy dri v es. See th e tabl e on th e ri ght
fo r p i n de fin i t i on s.
CD-ROM/
FDD Power
4-Pin Connector
(JP105 and JP106)
P i n# D e fin i t i on
1 +5 V
2 an d 3 G r oun d
4 + 12V
Backplane
Main Power
4-Pin Connector
(PWR0, PWR1, PWR2,
and PWR3)
P i n# D e fin i t i on
1 + 12V
2 an d 3 G r oun d
4 +5 V
#4. Backplane Main Power Connectors
T h e 4 - p i n conn e cto rs , desi gnat ed PW R0 ,
PW R1 , PW R2 , an d PW R3 , p r ov ide pow er
to th e backplan e. See th e tabl e on th e ri ght
fo r p i n de fin i t i on s.
#2 and 3. Primary and Secondary I 2 C Con-
nectors
T h e I 2 C C onn e cto rs a re u sed to mon i to r ha rd
dri v e act i v i ty an d s tatu s th r ough LE D . See
th e tabl e on th e ri ght fo r p i n de fin i t i on s. T h ere
a re fou r total conn e cto rs-- two p ri ma r y an d
two se con d a r y .
T h ese conn e cto rs a re opt i onal an d s houl d
only b e u sed by qual i fi ed t e chn i c i an s.
I 2 C Connector
Pin Defi nitions
P i n# D e fin i t i on
1 Data
2 G r oun d
3 C lock
4 N o C onn e ct i on
#5. Primary and Secondary Expander Chips
T h is P ri ma r y an d Se con d a r y E xpan der
C h i p s allow th e backplan e to s uppo r t d ual
po r t s , ca s ca di ng, an d fa i lov er.