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| Ref.: |
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| SpaceWire Router |
| UserManual |
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| Issue: | 3.4 |
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| User Manual |
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| Date: | 11th July 2008 |
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| 5.2.3 Operation with 5V Powered LVDS Devices |
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| WARNING |
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Since LVDS is based on a current loop it should not matter what the supply voltage is to an LVDS device connected to the
5.3 EXTERNAL PORT DATA SIGNALS
The External port signals are listed in Table
Table 5-3 External Port Interface Signals
PinNo | Signal | Dir | Description | Type |
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112 | EXT9_OUT_DATA(8) | Out | Output data from external port number one | CMOS3V3 |
111 | EXT9_OUT_DATA (7) |
| FIFO. Bit eight determines the type - data, |
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110 | EXT9_OUT_DATA(6) |
| EOP or EEP. The encodings are defined as: |
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107 | EXT9_OUT_DATA(5) |
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104 | EXT9_OUT_DATA(4) |
| (8)(7......0) – Bits |
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103 | EXT9_OUT_DATA(3) |
| (0)(dddddddd) - Data byte |
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102 | EXT9_OUT_DATA(2) |
| (1)(XXXXXXX0) - EOP. |
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101 | EXT9_OUT_DATA(1) |
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| (1)(XXXXXXX1) - EEP. |
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100 | EXT9_OUT_DATA(0) |
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| Bit 7 is the most significant bit of the data byte. |
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113 | EXT9_OUT_EMPTY_N | Out | FIFO ready signal for external output port | CMOS3V3 |
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| zero. When high the FIFO has data. When low |
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| the FIFO is empty. |
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114 | EXT9_OUT_READ_N | In | Asserted (low) to read from the external output | CMOS3V3 |
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| port zero FIFO. |
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| A |
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| connected to this input if External FIFO port 9 |
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| is not being used. |
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123 | EXT9_IN_DATA(8) | In | Input data to external port number one FIFO. | CMOS3V3 |
122 | EXT9_IN_DATA(7) |
| Bit eight determines the type - data, eop or |
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121 | EXT9_IN_DATA(6) |
| eep. The encodings are defined as: |
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| Preliminary | 37 |