ADA-91270-90340-100PFV v1.0
Chapter 4 Jumpers and Switches
© Fujitsu Microelectronics Europe GmbH
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UG-910012-16
4.2 Analogue Power Supply Voltage (JP: 60, 61, 62, 63)
The power supply as well as the positive reference voltage for the A/D-converter can be
provided internally or externally.
JP60, JP61 connect power supply voltages (AVcc and AVss)
JP62, JP63 connect reference voltages (AVRH to AVcc, ARRL to AVss)
Jumper
Setting
Description
ON (closed)
AVss is connected to GND
JP60 (AVss)
OFF (open)
AVss is disconnected from GND
ON (closed)
AVcc is connected to Vcc
JP61 (AVcc)
OFF (open)
AVcc is disconnected from Vcc
ON (closed)
AVRL is connected to AVss
JP62 (AVRL)
OFF (open)
AVRL defined by resistor network
*1
ON (closed)
AVRH is connected to AVcc
JP63 (AVRH)
OFF (open)
AVRH defined by resistor network
*1
*1
By default the resistor network (R11, R23 and R26, R27) is not mounted on the board
Default: JP60, JP61, JP62 and JP63 are closed
By default, the A/D-converter supply and reference voltage is same as the microcontroller
supply voltage.
Note:
If JP60 and J61 are open, the user has to supply an adequate analogue voltage supply
(AVcc and AVss) to the A/D-converter.
If JP63 is open, the resistors R11 and R23 define AVRH.
If JP62 is open, the resistors R26 and R27 define AVRL.
By default the resistor network (R11, R23 and R26, R27) is not mounted on the board.
