LQFP176 datasheet(95/133 Pages) STMICROELECTRONICS

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SPC560B54x/6x

Electrical characteristics

132

4.16

Slow internal RC oscillator (128 kHz) electrical

characteristics

The device provides a 128 kHz low power internal RC oscillator. This can be used as the

reference clock for the RTC module.

IFIRCSTOP CC T

Fast internal RC oscillator high

frequency and system clock

current in stop mode

TA = 25 °C

sysclk = off

—

500

—

µA

sysclk = 2 MHz

—

600

—

sysclk = 4 MHz

—

700

—

sysclk = 8 MHz

—

900

—

sysclk = 16 MHz

—

1250

—

tFIRCSU

CC C

Fast internal RC oscillator start-

up time

VDD = 5.0 V ± 10%

—

1.1

2.0

µs



FIRCPRE

CC C

Fast internal RC oscillator

precision after software

trimming of fFIRC

TA = 25 °C

1—



FIRCTRIM

CC C

Fast internal RC oscillator

trimming step

TA = 25 °C

—

1.6



FIRCVAR

CC C

Fast internal RC oscillator

variation over temperature and

supply with respect to fFIRC at

TA = 25 °C in high-frequency

configuration

—

5—

VDD = 3.3 V ± 10% / 5.0 V ± 10%, TA = 40 to 125 °C, unless otherwise specified.

This does not include consumption linked to clock tree toggling and peripherals consumption when RC oscillator is ON.

Table 42. Fast internal RC oscillator (16 MHz) electrical characteristics (continued)

Symbol

Parameter

Conditions(1)

Value

Unit

Min

Typ

Max

Table 43. Slow internal RC oscillator (128 kHz) electrical characteristics

Symbol

Parameter

Conditions(1)

Value

Unit

Min

Typ

Max

fSIRC

CC P Slow internal RC oscillator low

frequency

TA = 25 °C, trimmed

—

128

—

kHz

SR —

—

100

—

150

ISIRC

(2)

CC C

Slow internal RC oscillator low

frequency current

TA = 25 °C, trimmed

—

µA

tSIRCSU

CC P

Slow internal RC oscillator start-up

time

TA = 25 °C, VDD = 5.0 V ± 10%

—

µs

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