Chapter 3 |
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Table | |||||
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| Pin # | GND | Digital Ground |
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| 1 | TX2+ | Analog Twisted Pair Ethernet Transmit Differential Pair. These pins transmit |
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| the serial bit stream for transmission on the Unshielded Twisted Pair Cable |
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| 3 | TX2- |
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| (UTP). These signals interface directly with an isolation transformer. |
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| 4 | RX2+ | Analog Twisted Pair Ethernet Receive Differential Pair. These pins receive |
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| the serial bit stream from the isolation transformer. |
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| 6 | RX2- |
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| 9 | ACT | Link/Activity signal indicates a Link is established or Activity is occurring |
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| 11 | SPEED | Speed signal for 10BaseT or 100BaseT transfer rate |
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| 2, 7, 8 |
| NC | Not connected |
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| 5, 13, 14 | GND | Grounded (goes to ground through 0.1∝ capacitor) |
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| 10, 12 |
| +3VSB | +3V for plus side of LEDs. See Table |
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Notes: The shaded area denotes power or ground.
Audio Interface (J19)
The audio solution on the ReadyBoard 700 is provided by the Southbridge (VT82C686B) and the ion board Audio CODEC (VT1612A). These two chips communicate through a digital interface, defined by and compliant with AC’97 Rev 2.2. Input or output signals for the audio interface go through the 16- pin connector (J19) to an external cable and/or board, which has the respective audio connections. The
Audio CODEC (VT1612A) features
•AC’97 Rev 2.2 compliant
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•Variable sampling rate at 1Hz resolution
•Stereo (Left and Right) Line In
•Stereo (Left and Right) Line Out
•Microphone (mono) in
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Table
Pin # Signal
Description
1, 3 | NC | Not Connected | |
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2, 4, 7, 8, 11, | GND_AUD | Audio ground | |
12, 13, 14, 16 |
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5 | LINEOUTL | Line Out signal left channel | |
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6 | LINEOUTR | Line Out signal right channel | |
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9 | LINE_IN_L | Line in signal left channel | |
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10 | LINE_IN_R | Line in signal right channel | |
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15 | MICIN | Microphone signal in | |
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Notes: The shaded area denotes power or ground.
ReadyBoard 700 | Reference Manual | 45 |
