Owners manual

System

4.19. Thermal Sensor Controller

4.19.1. Overview

The thermal sensors have become common elements in wide range of modern system on chip (SOC) platform. Thermal

sensors are used to constantly monitor the temperature on the chip.

H3 embeds one thermal sensor located in the CPU .The thermal sensor Generates interrupt to SW to lower temperature

via DVFS, on reaching a certain thermal threshold.

The Thermal Sensor Controller includes the following features:

 Supports APB 32-bits bus width

 Power supply voltage:3.0V

 Low power dissipation

 Periodic temperature measurement

 Averaging filter for thermal sensor reading

 Support over-temperature protection interrupt and over-temperature alarm interrupt

4.19.2. Clock and Timing Requirements

CLK_IN = 24MHz/M, M can be set in the CCU

Conversion Time = 1/(24MHz/M/14Cycles) =0.583 * M (us)

THERMAL_PER (configured by the value of THERMAL_PER) is must be greater than (ACQ1 + ACQ0+Conversion Time)

THERMAL_PER > ACQ1 + ACQ0+Conversion Time

Figure 4-13. Thermal Conversion phase

4.19.3. Thermal Sensor Register List

Module Name

Base Address

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