Chapter 3 Jumpers and Switches
3.4Analog Power Supply Voltage (JP: 11, 12, 13, 14)
The power supply as well as the positive reference voltage for the
JP11, JP14 connects analog power supply voltages (AVcc and AVss)
JP12 connects the low pass filtered analog reference voltage AVRH to AVcc
JP13 connects the low pass filtered analog reference voltage AVRL to AVss
Jumper |
| Setting |
| Description |
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JP11 |
| Closed |
| AVcc is connected to Vcc |
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(AVcc) |
| Open |
| AVcc is disconnected from Vcc |
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JP12 |
| Closed |
| AVRH is connected to AVcc |
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(AVRH) |
| Open |
| AVRH defined by resistor network | *1 | |
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JP13 |
| Closed |
| AVRL is connected to AVss |
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(AVRL) |
| Open |
| AVRL defined by resistor network | *1 | |
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JP14 |
| Closed |
| AVss is connected to GND |
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(AVss) |
| Open |
| AVss is disconnected from GND |
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*1By default | the resistor network (R16, | R17, R20, R21) is not mounted on the board | ||||
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| Table |
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Default: JP11, JP12, JP13, and JP14 are closed
By default, the
Note:
If JP11 and JP14 are open, the user has to supply an adequate analog voltage supply (AVcc and AVss) to the
If JP12 and JP13 are open, the resistors R16, R17, R20, and R21 define AVRH and AVRL. By default the resistor network (R16, R17, R20, and R21) is not mounted on the board.
3.5Alarm Comparator (JP: 85)
Potentiometer RP2 is connected to ALARM0 in order to evaluate comparator 0 of the microcontroller. Any voltage between VCC and GND can be set. Additionally the adjusted voltage can be measured at connector J2.
JP78 One potentiometer can be connected to the ALARM0/AN8
Jumper |
| Setting |
| Description | |
JP85 |
| Closed |
| Pin 26 | (ALRAM0/AN8) of the MCU is connected to RP2 |
(ALARM0) |
| Open |
| Pin 26 | (ALRAM0/AN8) of the MCU is not connected |
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Table 3-4: Alarm Comparator
© Fujitsu Microelectronics Europe GmbH | - 17 - |