MPC5646C datasheet(71/114 Pages) FREESCALE

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MPC5646C Microcontroller Data Sheet, Rev. 3

Preliminary—Subject to Change Without Notice

Freescale Semiconductor

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

TA = 55 °C VDD = 5.0 V ± 10%

—

2.0

µs

—VDD = 3.3 V ± 10%

—

—TA = 125 °C VDD = 5.0 V ± 10%

—

2.0

—VDD = 3.3 V ± 10%

—



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—

1 V

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

2 All values need to be confirmed during device validation.

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

ON.

Table 40. Slow internal RC oscillator (128 kHz) electrical characteristics

Symbol

Parameter

Conditions1

Value2

Unit

Min

Typ

Max

fSIRC

CC P Slow internal RC oscillator low

frequency

TA = 25 °C, trimmed

—

128

—

kHz

SR —

—

100

—

150

ISIRC

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

Table 39. Fast internal RC oscillator (16 MHz) electrical characteristics

Symbol

Parameter

Conditions1

Value2

Unit

Min

Typ

Max

MPC5646C Datasheet(PDF) 71 Page - Freescale Semiconductor, Inc

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