STM32F217VG datasheet(122/173 Pages) STMICROELECTRONICS

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Electrical characteristics

STM32F21xxx

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Doc ID 17050 Rev 8

5.3.24

Embedded reference voltage

The parameters given in Table 68 are derived from tests performed under ambient

temperature and VDD supply voltage conditions summarized in Table 11.

5.3.25

FSMC characteristics

Asynchronous waveforms and timings

Figure 53 through Figure 56 represent asynchronous waveforms and Table 69 through

Table 72 provide the corresponding timings. The results shown in these tables are obtained

with the following FSMC configuration:

●

AddressSetupTime = 1

●

AddressHoldTime = 1

●

DataSetupTime = 1

●

BusTurnAroundDuration = 0x0

In all timing tables, the THCLK is the HCLK clock period.

Table 68.

Embedded internal reference voltage

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

VREFINT

Internal reference voltage

–40 °C < TA < +105 °C 1.18

1.21

1.24

TS_vrefint

(1)

Shortest sampling time can be determined in the application by multiple iterations.

ADC sampling time when

reading the internal reference

voltage

µs

VRERINT_s

(2)

Guaranteed by design, not tested in production.

Internal reference voltage

spread over the temperature

range

VDD = 3 V

TCoeff

(2)

Temperature coefficient

ppm/°C

tSTART

(2)

Startup time

µs

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