C8051T601 View Datasheet(PDF) - Silicon Laboratories
Part Name
Description
MFG CO.
'C8051T601' PDF : 168 Pages View PDF
C8051T600/1/2/3/4/5/6
9.5. ADC0 Analog Multiplexer (C8051T600/2/4 only)
ADC0 on the C8051T600/2/4 uses an analog input multiplexer to select the positive input to the ADC. Any
of the following may be selected as the positive input: Port 0 I/O pins, the on-chip temperature sensor, or
the positive power supply (VDD). The ADC0 input channel is selected in the AMX0SL register described in
SFR Definition 9.9.
AMX0SL
P0.0
AMUX
ADC0
Temp
Sensor
P0.7
VDD
Figure 9.6. ADC0 Multiplexer Block Diagram
Important Note About ADC0 Input Configuration: Port pins selected as ADC0 inputs should be config-
ured as analog inputs and should be skipped by the Digital Crossbar. To configure a Port pin for analog
input, set the corresponding bit in register PnMDIN to ‘0’. To force the Crossbar to skip a Port pin, set the
corresponding bit in register XBR0 to ‘1’. See Section “22. Port Input/Output” on page 106 for more Port
I/O configuration details.
50
Rev. 1.2
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