mpc5645s Freescale Semiconductor, Inc, mpc5645s Datasheet - Page 86

• Manufacturer Part Number: mpc5645s
• Description: Mpc5645s Microcontroller Data Sheet
• Manufacturer: Freescale Semiconductor, Inc

Electrical characteristics
4.10
This device implements the fast external oscillator (FXOSC) using a low power Loop Controlled Pierce Oscillator (LCP)
configuration.
1
2
86
4
5
6
V
V
V
V
f
Maximum value is for extreme cases using high Q, low frequency crystals
Guaranteed by design simulation.
This is a transient configuration during power-up, up to the end of reset PHASE2 (refer to RGM module section of the reference
manual).
C
HYS,EXTAL
OSC
t
t
PP,EXTAL
IH,EXTAL
CQOUT
IL,EXTAL
UPOSC
f
L
t
t
t
t
f
i
CMFA
f
EXTH
EXTR
EXTL
EXTF
C
OSC
OSC
EXT
calculation should include device and package capacitance (C
Symbol
IN
= 4 MHz, C = 22 pF
Fast external crystal oscillator (4–16 MHz) electrical
characteristics
C
P
C
D
D
D
D
D
D
D
D
P
T
P
T
C
C
Crystal oscillator range
Startup current
Oscillator start-up time
Clock quality check time-out
Clock monitor failure assert
frequency
External square wave input
frequency
External square wave pulse
width low
External square wave pulse
width high
External square wave rise time
External square wave fall time
Input capacitance
EXTAL pin input high voltage
EXTAL pin input low voltage
EXTAL pin input hysteresis
EXTAL pin oscillation amplitude Loop controlled Pierce
Table 35. Fast external crystal oscillator electrical characteristics
2
Parameter
MPC5645S Microcontroller Data Sheet, Rev. 6
2
2
2
Loop controlled Pierce
Loop controlled Pierce
EXTAL and XTAL pins
Conditions
PKG
< 5pF).
V
V
0.75
SSPLL
0.45
DDPLL
Min
100
200
4.0
2.0
9.5
9.5
0.3
-
Value
Typ
400
180
1.0
4
7
1
V
V
0.25
Freescale Semiconductor
Max
+0.3
DDPLL
DDPLL
800
50
2.5
16
50
1
1
2
MHz
Unit
MHz
kHz
mV
ms
µA
pF
ns
ns
ns
ns
V
V
V
s
SpecID
O9.10
O9.11
O9.12
O9.13
O9.14
O9.15
O9.1
O9.2
O9.3
O9.4
O9.5
O9.6
O9.7
O9.8
O9.9