C8051F987-GMR Silicon Labs, C8051F987-GMR Datasheet - Page 83
C8051F987-GMR
Manufacturer Part Number
C8051F987-GMR
Description
8-bit Microcontrollers - MCU 8kB 512B RAM
Manufacturer
Silicon Labs
Datasheet
1.C8051F986-GUR.pdf
(322 pages)
Specifications of C8051F987-GMR
Rohs
yes
Core
8051
Processor Series
C8051
Data Bus Width
8 bit
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5.8.
An on-chip temperature sensor is included on the C8051F99x-C8051F98x which can be directly accessed
via the ADC multiplexer in single-ended configuration. To use the ADC to measure the temperature sensor,
the ADC mux channel should select the temperature sensor. The temperature sensor transfer function is
shown in Figure 5.8. The output voltage (V
correctly. The TEMPE bit in register REF0CN enables/disables the temperature sensor, as described in
SFR Definition 5.15. 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 4.10 for the
slope and offset parameters of the temperature sensor.
Temperature Sensor
Figure 5.8. Temperature Sensor Transfer Function
Temp
V
TEMP
C
=
= 25 + (
Slope
TEMP
V
x (Temp
) is the positive ADC input when the ADC multiplexer is set
TEMP
Rev. 1.1
Temperature
- Offset) /
C8051F99x-C8051F98x
C
Offset
- 25) +
( V at 25 Celsius)
Slope
Offset
Slope
( V / deg C)
83
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