Acer Altos G520 series, Service Manual

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Chapter 5 86
USB Connectors Pin-out (J3)
Pin Signal Name
1 Fused VCC (+5V /w over current monitor of both port 3)
2 DATAN3 (Differential data line paired with DATAH3)
3 DATAP3 (Differential data line paired with DATAL3)
4 GND
5 Fused VCC (+5V /w over current monitor of both port 2)
6 DATAN2 (Differential data line paired with DATAH2)
7 DATAP2 (Differential data line paired with DATAL2)
8 GND
9 CTS_N
10 DSR_DCD
11 SIN
12 RI_N
13 GND
14 SIUT
15 DTR_N
16 RTS_N
Optional USB Connection Header Pin-Out (J31)
Pin Signal Name Pin Singal Name
1 Fused VCC (+5V /w over current
monitor of both port 1) 2 Fused VCC (+5V /w over current
monitor of both port 0)
3 DATAN1 4 DATAN0
5 DATAP1 6 DATAP0
7 GND 8 GND
9 Key 10 NC
Legacy 34-pin Floppy Connector Pin-out (J47)
Pin Signal Name Pin Signal Name
1 GND 2 FDDENSEL
3 GND 4 Unused
5 KEY 6 FDDRATE0
7 GND 8 FDINDEX#
9 GND 10 FDMTR0#
11 GND 12 FDR1#
13 GND 14 FDR0#
15 GND 16 FDMTR1#
17 Unused 18 FDDIR
19 GND 20 FDSTEP#
21 GND 22 FDWDATA#
23 GND 24 FDWGATE#
25 GND 26 FDTRK0#
27 Unused 28 FLWP#