Техническая Спецификация для Freescale Semiconductor Evaluation Board for MPC5500 Series MPC5554EVBE MPC5554EVBE
Модели
MPC5554EVBE
MPC5554 Microcontroller Data Sheet, Rev. 4
Electrical Characteristics
Freescale Semiconductor
20
3.9
Oscillator and FMPLL Electrical Characteristics
Table 12. FMPLL Electrical Specifications
(V
DDSYN
= 3.0–3.6 V; V
SS
= V
SSSYN
= 0.0 V; T
A
= T
L
to T
H
)
Spec
Characteristic
Symbol
Minimum Maximum
Unit
1
PLL reference frequency range:
1
Crystal reference
External reference
Dual controller (1:1 mode)
External reference
Dual controller (1:1 mode)
f
ref_crystal
f
ref_ext
f
ref_1:1
8
8
8
24
20
20
20
f
sys
2
MHz
2
System frequency
2
f
sys
f
ICO
(
MIN
)
2
RFD
f
MAX
3
MHz
3
System clock period
t
CYC
—
1
f
sys
ns
4
Loss of reference frequency
4
f
LOR
100
1000
kHz
5
Self-clocked mode (SCM) frequency
5
f
SCM
7.4
17.5
MHz
6
EXTAL input high voltage crystal mode
6
All other modes
[dual controller (1:1), bypass, external reference]
V
IHEXT
V
IHEXT
V
XTAL
+ 0.4 V
(V
DDE5
2) + 0.4 V
—
—
V
V
7
EXTAL input low voltage crystal mode
7
All other modes
[dual controller (1:1), bypass, external reference]
V
ILEXT
V
ILEXT
—
—
V
XTAL
– 0.4 V
(V
DDE5
2) – 0.4 V
V
V
8
XTAL current
8
I
XTAL
0.8
3
mA
9
Total on-chip stray capacitance on XTAL
C
S_XTAL
—
1.5
pF
10
Total on-chip stray capacitance on EXTAL
C
S_EXTAL
—
1.5
pF
11
Crystal manufacturer’s recommended capacitive
load
load
C
L
Refer to crystal
specification
Refer to crystal
specification
pF
12
Discrete load capacitance to connect to EXTAL
C
L_EXTAL
—
(2
C
L
)
– C
S_EXTAL
– C
PCB_EXTAL
9
pF
13
Discrete load capacitance to connect to XTAL
C
L_XTAL
—
(2
C
L
)
– C
S_XTAL
– C
PCB_XTAL
pF
14
PLL lock time
10
t
lpll
—
750
s
15
Dual controller (1:1) clock skew
(between CLKOUT and EXTAL)
11, 12
t
skew
–2
2
ns
16
Duty cycle of reference
t
DC
40
60
%
17
Frequency unLOCK range
f
UL
–4.0
4.0
%
f
SYS
18
Frequency LOCK range
f
LCK
–2.0
2.0
%
f
SYS