TOOLSTICK542PP Silicon Laboratories Inc, TOOLSTICK542PP Datasheet - Page 69
TOOLSTICK542PP
Manufacturer Part Number
TOOLSTICK542PP
Description
PLATFORM PROG TOOLSTICK F542
Manufacturer
Silicon Laboratories Inc
Series
ToolStickr
Type
Microcontroller Programmerr
Specifications of TOOLSTICK542PP
Contents
2 Boards and USB Connecting Cable
Processor To Be Evaluated
C8051F542
Interface Type
USB
Operating Supply Voltage
2.7 V to 3.6 V
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With/related Products
C8051F542
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
336-1718
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8.1. Comparator Multiplexer
C8051F54x devices include an analog input multiplexer for each of the comparators to connect Port I/O
pins to the comparator inputs. The Comparator0 inputs are selected in the CPT0MX register (SFR Defini-
tion 8.5). The CMX0P3–CMX0P0 bits select the Comparator0 positive input; the CMX0N3–CMX0N0 bits
select the Comparator0 negative input. Similarly, the Comparator1 inputs are selected in the CPT1MX reg-
ister using the CMX1P3-CMX1P0 bits and CMX1N3-CMX1N0 bits. The same pins are available to both
multiplexers at the same time and can be used by both comparators simultaneously.
Important Note About Comparator Inputs: The Port pins selected as comparator inputs should be con-
figured as analog inputs in their associated Port configuration register, and configured to be skipped by the
Crossbar (for details on Port configuration, see Section “18.6. Special Function Registers for Accessing
and Configuring Port I/O” on page 161).
P0.1
P0.3
P0.5
P0.7
P1.1
P1.3
P1.5
P1.7
P2.1
P2.3
P2.5
P2.7
CMXnN3
CMXnN2
CMXnN1
CMXnN0
CMXnP3
CMXnP2
CMXnP1
CMXnP0
Figure 8.3. Comparator Input Multiplexer Block Diagram
P0.0
P0.2
P0.4
P0.6
P1.0
P1.2
P1.4
P1.6
P2.0
P2.2
P2.4
P2.6
Rev. 1.1
CPn +
CPn -
+
-
C8051F54x
VDD
GND
69
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