STA8100GA datasheet(19/42 Pages) STMICROELECTRONICS

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DS13006 Rev 4

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STA8100GA

General description

3.17

Temperature sensor

Thermal sensor provides digital measurement of junction temperature. Temperature

measurement range is -40 to 125 °C. It uses integrated bandgap reference and 8-bit ADC.

The temperature sensor provides two threshold registers. Writing in these registers and

enabling the threshold mode compare the temperature recorded with the threshold value. If

the temperature is higher than the upper threshold register or lower than the lower threshold

3.18

Serial boot pins

UART2-TX (Boot0) pin is used to select the boot configuration of Cortex® M7. The ROM

code starts the boot process which then reads the PRCC register (UART2-TX) which has

already latched the UART2-TX pin (C8 ball) status after latch reset.

Based on this register value, the code is loaded from one of the two options as given in the

table below:

Table 8. Antenna sensing current - power rising

Current from antenna

(when current is rising)

SENSE<1>

SENSE<0>

I < 24 mA

24 ≤ I ≤ 62 mA

I > 62 mA

Table 9. Antenna sensing current - power falling

Current sunk from antenna

(when current is falling)

SENSE<1>

SENSE<0>

I > 53 mA

16 ≤ I ≤ 53 mA

I < 16 mA

Table 10. Temperature sensor

Symbol

Parameter

Test condition

Min.

Typ.

Max.

Unit

Tsens

Sensitivity

—

°C

Tacc(1)

Accuracy

Calibration performed at 125°C

+/-3(2)

—+/-10

°C

1. Best accuracy is at calibrated temperature.

2. Limited by manufacturing calibration environment.

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