8.14 Floppy Connector; Table 131. Optional Usb Connection Header Pin-Out (J1K4); Table 132. Legacy 34-Pin Floppy Connector Pin-Out (J3K2) - Intel SE7520AF2 Technical Product Specification

Connectors, Headers and Jumpers
In addition, a header on the server board (DH10) provides an option to support two additional
USB ports. The pin-out of the header is detailed in the following table.

Table 131. Optional USB Connection Header Pin-out (J1K4)

Pin Signal Name
1 USB_PWR<5>
2 USB_PWR<4>
3 USB_BCK5_L
4 USB_BCK4_L
5 USB_BCK5
6 USB_BCK4
7 Ground
8 Ground
9 No Connect
10 TP_USB_OVRCUR3_L

8.14 Floppy Connector

The Intel® Server Board SE7520AF2 provides a standard 34-pin interface to the floppy drive
controller. The following tables detail the pin-out of the 34-pin legacy floppy connector.

Table 132. Legacy 34-pin Floppy Connector Pin-out (J3K2)

236
2 USB_BCK0_L
3 USB_BCK0
4
5 USB_PWR<1> (Fused 5 V)
6 USB_BCK1_L
7 USB_BCK1
8
9 USB_PWR<2> (Fused 5 V)
10 USB_BCK2_L
11 USB_BCK2
12
USB Port 5 Power
USB Port 4 Power
USB Port 5 Negative Signal
USB Port 4 Negative Signal
USB Port 5 Positive Signal
USB Port 4 Positive Signal
KEY
Front Panel USB Overcurrent signal. This signal is not used
Pin Signal Name Pin
1 GND 2
3 GND 4
5 KEY 6
7 GND 8
9 GND 10
11 GND 12
13 GND 14
15 GND 16
17 Test Point 18
19 GND 20
Intel order number C77866-003
Intel® Server Board SE7520AF2 TPS
GND
GND
GND
Description
Signal Name
FD_DENSEL0
Test Point
FD_DENSEL1
FD_INDEX_L
FD_MTR0_L
FD_DS1_L
FD_DS0_L
FD_MTR1_L
FD_DIR_L
FD_STEP_L
Revision 1.2