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Pin Number Pin function Ps.
1 AC97_AGND
2 AC97_AGND
3 TPRX100N
4 TPRX100P
5 TPTX100N
6 TPTX100P
7 nSPEED100
8 nLINK
9 AC97_AGND
10 AC97_AGND
11 IO_VCC3P3
12 IO_VCC3P3
13 VCC_USB_H1
14 VCC_USB_H2
15 USB_P1
16 USB_N1
17 USB_P2
18 USB_N2
19 AC97_AGND
20 AC97_AGND
3.3 Power system
The power system of the SPC-57 includes IO board, adapter and power cord.
Users can only use a Terminal Block 5.08mm 3P MALE 19Vdc power adapter to be
SPC-57’s power input. There is one 3.0V, coin-type rechargeable backup battery on
SPC-57. This coin battery is mainly for external RTC of the PCM-7230. When the
power switch is on, the external DC power will automatically charge this coin battery.