Digital Equipment AXPpci 33, Design Manual

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Physical Description
2.2.2.3 Fan Connector (J1)
The fan connector (J1) is intended to power the DECchip 21066 processor’s
specified heatsink fan, or an enclosure mounted fan, not to exceed
250 mA. J1 is a 3-position vertical male-keyed connector.
CAUTION: Exceeding 250 mA may damage the MLB.
Table 2–3 lists the pin numbers and functions for the fan connector.
Table 2–3 Fan Connector Pin-Out (J1)
Pin Number Function
1 +12 V
2 No connection
3 Ground
2.2.2.4 Floppy Disk Connector (J12)
The AXPpci 33 supports one floppy disk controller interface (J12). This is
a 34-position (2 x 17) male-shrouded keyed connector.
Table 2–4 lists the pin numbers and functions for the floppy disk
connector.
Table 2–4 Floppy Disk Connector Pin-Out (J12)
Pin
Number
Function
Pin
Number
Function
1 Ground 2 DENSEL
3 Ground 4 MTR3 L
5 Ground 6 DRATE0
7 Ground 8 INDEX L
9 Ground 10 MTR0 L
11 Ground 12 DR1 L
13 Ground 14 DR0 L
15 Ground 16 MTR1 L
17 No connection 18 DIR L
19 Ground 20 STEP L
21 Ground 22 WRDATA L
23 Ground 24 WGATE L
25 Ground 26 TRK0 L
27 No connection 28 WP L
29 Ground 30 RDDATA L
31 Ground 32 HDSEL L
33 Ground 34 DISKCH L
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