C8051F544-IQR Silicon Labs, C8051F544-IQR Datasheet - Page 60

• Manufacturer Part Number: C8051F544-IQR
• Description: 8-bit Microcontrollers - MCU 50 MIPS 8 kB 1kB LIN 2.1 SPI UART I2C
• Manufacturer: Silicon Labs

Specifications of C8051F544-IQR

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

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)