C8051F502-IMR Silicon Laboratories Inc, C8051F502-IMR Datasheet - Page 70
C8051F502-IMR
Manufacturer Part Number
C8051F502-IMR
Description
MCU 8-Bit C8051F50x 8051 CISC 64KB Flash 2.5V/3.3V/5V 32-Pin QFN EP T/R
Manufacturer
Silicon Laboratories Inc
Datasheet
1.C8051F502-IM.pdf
(312 pages)
Specifications of C8051F502-IMR
Package
32QFN EP
Device Core
8051
Family Name
C8051F50x
Maximum Speed
50 MHz
Ram Size
4.25 KB
Program Memory Size
64 KB
Operating Supply Voltage
2.5|3.3|5 V
Data Bus Width
8 Bit
Program Memory Type
Flash
Number Of Programmable I/os
25
Interface Type
I2C/SPI/UART
On-chip Adc
32-chx12-bit
Operating Temperature
-40 to 125 °C
Number Of Timers
4
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C8051F50x/F51x
6.5. ADC0 Analog Multiplexer
ADC0 includes an analog multiplexer to enable multiple analog input sources. Any of the following may be
selected as an input: P0.0 – P3.7, the on-chip temperature sensor, the core power supply (V
(GND). ADC0 is single-ended and all signals measured are with respect to GND. The ADC0 input
channels are selected using the ADC0MX register as described in SFR Definition 6.13.
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 to 0 the corresponding bit in register PnMDIN. To force the Crossbar to skip a Port pin, set to 1
the corresponding bit in register PnSKIP. See Section “20. Port Input/Output” on page 177 for more Port
I/O configuration details.
70
Sensor
Temp
Figure 6.8. ADC0 Multiplexer Block Diagram
P0.0
P0.7
P1.0
P1.7
P2.0
P2.7
P3.0
P3.7
GND
VDD
AMUX
Rev. 1.2
*P3.1-P3.7 Only available as
inputs on 48-pin and 40-pin
ADC0MX
ADC0
packages
DD
), or ground
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