C8051F542-IMR Silicon Labs, C8051F542-IMR Datasheet - Page 60
C8051F542-IMR
Manufacturer Part Number
C8051F542-IMR
Description
8-bit Microcontrollers - MCU 50 MIPS 16 kB 1 kB LIN 2.1 SPI
Manufacturer
Silicon Labs
Datasheet
1.C8051F546-IMR.pdf
(274 pages)
Specifications of C8051F542-IMR
Rohs
yes
Core
8051
Data Bus Width
8 bit
Processor Series
C8051
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C8051F54x
6.2. Temperature Sensor
An on-chip temperature sensor is included on the C8051F54x devices which can be directly accessed via
the ADC multiplexer in single-ended configuration. To use the ADC to measure the temperature sensor,
the ADC multiplexer channel should be configured to connect to the temperature sensor. The temperature
sensor transfer function is shown in Figure 6.3. The output voltage (V
selected by bits AD0MX[4:0] in register ADC0MX. The TEMPE bit in register REF0CN enables/disables
the temperature sensor, as described in SFR Definition 7.1. While disabled, the temperature sensor
defaults to a high impedance state and any ADC measurements performed on the sensor will result in
meaningless data. Refer to Table 6.10 for the slope and offset parameters of the temperature sensor.
60
Figure 6.3. Temperature Sensor Transfer Function
V
Temp
TEMP
C
=
= (V
(Slope
TEMP
x Temp
- Offset) /
Temperature
Rev. 1.1
C
) +
Offset
Slope
Offset
(V at 0 Celsius)
Slope
TEMP
) is the positive ADC input is
(V / deg C)
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