
VIPER Technical Manual | Connectors, LEDs and jumpers |
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Jumpers
There are seven user selectable jumpers on the VIPER. Their use is explained below.
Default settingsThe default positions of the jumpers are shown below. Jumper functions described in silkscreen on the board are shown in blue.
LK7 LK6 |
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1 | 2 |
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3 | 4 |
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5 | 6 |
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7 | 8 | LK5 |
9 | 10 | LK4 |
FD | FD |
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HD | HD |
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120R |
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120R |
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LK8
1 | +5V | LCD |
3 | 3V.+3 | Voltage |
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5 |
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JP3 |
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| JP4 |
1 | 2 | LK3 | 1 | 2 LK9 |
3 | 4 | LK2 |
| BAT |
5 | 6 | LK1 |
| Connect |
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A momentary switch (push to make) may be connected to LK1. When pressed the board goes into a full hardware reset. When the switch is released (open circuit) the board reboots.
Reserved – LK2 on JP3This jumper is reserved for factory use only. Please do not fit LK2 across JP3 pins 3 and 4.
User configurable jumper 1 – LK3 on JP3This jumper can be used by an application program to signify a configuration setting.
LK3DescriptionGPIO7 read as ‘0’. | Default setting: |
GPIO7 read as ‘1’. |
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The USER_CONFIG1 (GPIO7) signal on LK3 may be used to wake the VIPER from sleep. One way of doing this is to connect a momentary push to make switch to LK3.
© 2007 Eurotech Ltd Issue E | 98 |