C8051T320-GQR Silicon Labs, C8051T320-GQR Datasheet - Page 82

• Manufacturer Part Number: C8051T320-GQR
• Description: 8-bit Microcontrollers - MCU USB-OTP-16K-ADC
• Manufacturer: Silicon Labs

Specifications of C8051T320-GQR

• Rohs: yes
• Core: 8051
• Data Bus Width: 8 bit
• Processor Series: C8051

C8051T620/621/320/321/322/323
14.1. Comparator Multiplexers
C8051T620/621/320/321/322/323 devices include an analog input multiplexer to connect Port I/O pins to
the comparator inputs. The Comparator inputs are selected in the CPTnMX registers (SFR Definition 14.5
and SFR Definition 14.6). The CMXnP2–CMXnP0 bits select the Comparator positive input; the CMXnN2–
CMXnN0 bits select the Comparator negative input.
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 “22.6. Special Function Registers for Accessing
and Configuring Port I/O” on page 146).
82
P1.0
P1.4
P2.0
P2.4
P0.0
P1.1
P1.5
P2.1
P2.5
P0.1
CPT0MX
Figure 14.4. Comparator Input Multiplexer Block Diagram
CP0 +
CP0 -
+
-
VDD
GND
Rev. 1.1
P1.2
P1.6
P2.2
P0.4
P1.3
P1.7
P2.3
P0.5
CPT1MX
CP1 +
CP1 -
-
+
VDD
GND