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J11: GND connector
1: GND
2: GND
3: GND
4: GND
5: GND
6: GND
J U M P E R S ,
B U T T O N S
J13: Supply for the whole board
When SHORT, the +5V from the voltage regulator is connected to board VCC.
This jumper must be removed when using an external +5V power supply to
avoid current flowing back to the regulator.
J2: Supply for CPU
When SHORT, the VCC is connected to CPU's VCC pins. Before removing
this jumper, remove the J3 (AVCC to CPU) jumper as well to completely
disconnect the power from the CPU.
J3: Analog Supply for CPU
When SHORT, board's VCC is connected to CPU's AVcc pin.
J4: Analog Ground for CPU
When SHORT, board's GND is connected to CPU's AGND pin.
J5: Analog Reference Voltage (+) for CPU
When SHORT, board's VCC is connected to CPU's AVR+ pin. When
removed, the voltage at the AVR+ pin is set to 4V
J6: Analog Reference Voltage (-) for CPU
When SHORT, board's GND is connected to CPU's AVR- pin. When removed,
the voltage at the AVR- pin is set to 0.9V.
J7, J8, J9: UART0/1 selection for the K7 connector
These jumpers select, which of the two UART0, UART1 interfaces' signals will
be connected to the pins of the K7 connector. If all of these jumpers are in
1-2 position - the UART1 interface signals will be connected to the K7
2-3 position – the UART0 interface signals will be connected to the K7
connector.
Note: The J7 jumper selects between SCK1 and SCK0, J8 between SIN1
and SIN0 and J9 between SOT1 and SOT0
A N D
S W I T C H E S
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