MPC5644B View Datasheet(PDF) - Freescale Semiconductor
Part Name
Description
MFG CO.
'MPC5644B' PDF : 114 Pages View PDF
Table 39. Fast internal RC oscillator (16 MHz) electrical characteristics
Symbol C
Parameter
Conditions1
Value2
Unit
Min Typ Max
IFIRCSTOP
CC T Fast internal RC oscillator high
frequency and system clock
current in stop mode
TA = 25 °C
sysclk = off
sysclk = 2 MHz
sysclk = 4 MHz
— 500 — µA
— 600 —
— 700 —
sysclk = 8 MHz
— 900 —
sysclk = 16 MHz
— 1250 —
TFIRCSU CC C Fast internal RC oscillator
— start-up time
—
—
FIRCPRE CC C Fast internal RC oscillator
precision after software
trimming of fFIRC
FIRCTRIM CC C Fast internal RC oscillator
trimming step
TA = 55 °C VDD = 5.0 V ± 10% —
— 2.0 µs
VDD = 3.3 V ± 10% —
—
5
TA = 125 °C VDD = 5.0 V ± 10% —
— 2.0
VDD = 3.3 V ± 10% —
—
5
TA = 25 °C
1 — +1 %
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 — +5 %
1 VDD = 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.
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.
Table 40. Slow internal RC oscillator (128 kHz) electrical characteristics
Symbol C
Parameter
Conditions1
Value2
Unit
Min Typ Max
fSIRC
ISIRC3,
CC P Slow internal RC oscillator low
SR — frequency
CC C Slow internal RC oscillator low
frequency current
TA = 25 °C, trimmed
—
TA = 25 °C, trimmed
— 128 — kHz
100 — 150
— — 5 µA
TSIRCSU CC P Slow internal RC oscillator start-up TA = 25 °C, VDD = 5.0 V ± 10% — 8 12 µs
time
MPC5646C Microcontroller Data Sheet, Rev. 3
Freescale Semiconductor
Preliminary—Subject to Change Without Notice
71
Share Link: 
