VIPER Technical Manual

Connectors, LEDs and jumpers

 

 

Jumpers

There are seven user selectable jumpers on the VIPER. Their use is explained below.

Default settings

The default positions of the jumpers are shown below. Jumper functions described in silkscreen on the board are shown in blue.

JP1 VL

LK7 LK6

 

1

2

 

3

4

 

5

6

 

7

8

LK5

9

10

LK4

FD

FD

 

HD

HD

 

120R

 

120R

 

JP2

LK8

1

+5V

LCD

3

3V.+3

Voltage

 

 

5

 

 

JP3

 

 

 

JP4

1

2

LK3

1

2 LK9

3

4

LK2

 

BAT

5

6

LK1

 

Connect

 

 

2-1 USR

 

 

 

 

4-3 RSVD

 

 

 

 

6-5 RST

 

 

 

 

Reset – LK1 on JP3

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 JP3

This jumper is reserved for factory use only. Please do not fit LK2 across JP3 pins 3 and 4.

User configurable jumper 1 – LK3 on JP3

This jumper can be used by an application program to signify a configuration setting.

LK3Description

GPIO7 read as ‘0’.

Default setting:

GPIO7 read as ‘1’.

 

 

 

 

 

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