PiXtend V2 -L- Hardware Manual
A 5 V supply output / sensor supply is located on the terminal block of the analog outputs
as well as on the terminal block of the analog inputs. This can, for example, be used to
supply small sensors (DHT11 / 22, AM2302 on the PiXend GPIOs) or switches that lead to
the digital inputs. Currents greater than 100 mA should not be taken permanently. In the
case of a short circuit or a permanent overload, the supply output is protected by a self-
resetting fuse.
Further information and a connection diagram can be found in the analog inputs on page
115 in this document.
The Digital to Analog Converter (DAC) for the AOs is connected to the Raspberry Pi via
SPI. Since the analog outputs (AO) and the CAN controller share an SPI chip select
(CS1), a prefix must be made. To do this, the jumper (Fig. 77) is set to the "AO" position
(standard configuration when the module is shipped).
As a result, a decision must be made between AO and CAN. Only one of the two devices
can be operated at a time. Parallel operation of both functions is not possible. The jumper
may only be moved when the module is switched/turned off.
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Figure 77: Jumper for switching between AO and
CAN
