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> Power Macintosh G3 Developer Note
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PATHADC Home > Documentation > Hardware
> Power Macintosh G3 Developer Note
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The USB ports use USB Type A connectors, which have four pins each. Two of the pins are used for power and two for data. Table 3-2 shows the pin assignments.
Table 3-2 USB connector pin assignments
| 1 | VCC | +5 VDC |
| 2 | D- | Data - |
| 3 | D+ | Data + |
| 4 | GND | Ground |
The USB ports support both low-speed and high-speed data transfers, at 1.5 Mbits per second and 12 Mbits per second, respectively.
