C8051T322-GQR Silicon Labs, C8051T322-GQR Datasheet - Page 55

• Manufacturer Part Number: C8051T322-GQR
• Description: 8-bit Microcontrollers - MCU USB-OTP-16K-LQFP32
• Manufacturer: Silicon Labs

Specifications of C8051T322-GQR

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

9. Temperature Sensor (C8051T620/320/321 only)
An on-chip temperature sensor is included on the C8051T620/320/321 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 be configured to connect to the temperature sensor. The temperature sensor
transfer function is shown in Figure 9.1. The output voltage (V
ADC multiplexer is set correctly. The TEMPE bit in register REF0CN enables/disables the temperature
sensor, as described in SFR Definition 10.1. 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 7.11 for the slope and offset parameters of the temperature sensor.
Figure 9.1. Temperature Sensor Transfer Function
V
Temp
TEMP
C
=
= (V
(Slope
C8051T620/621/320/321/322/323
TEMP
x Temp
- Offset) /
Temperature
Rev. 1.1
C
) +
Offset
Slope
Offset
TEMP
(V at 0 Celsius)
) is the positive ADC input when the
Slope
(V / deg C)
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