參數資料
型號: MCF5232CAB80
廠商: 飛思卡爾半導體(中國)有限公司
英文描述: Integrated Microprocessor Hardware Specification
中文描述: 集成的微處理器,硬件規(guī)格
文件頁數: 27/46頁
文件大?。?/td> 988K
代理商: MCF5232CAB80
Preliminary Electrical Characteristics
MCF523x Integrated Microprocessor Hardware Specification, Rev. 2
Freescale Semiconductor
27
7.4
Oscillator and PLLMRFM Electrical Characteristics
Table 10. HiP7 PLLMRFM Electrical Specifications
1
1
2
3
All values given are initial design targets and subject to change.
All internal registers retain data at 0 Hz.
“Loss of Reference Frequency” is the reference frequency detected internally, which transitions the PLL
into self clocked mode.
Self clocked mode frequency is the frequency that the PLL operates at when the reference frequency falls
below f
LOR
with default MFD/RFD settings.
This parameter is guaranteed by characterization before qualification rather than 100% tested.
Proper PC board layout procedures must be followed to achieve specifications.
Num
Characteristic
Symbol
Min.
Value
Max.
Value
Unit
1
PLL Reference Frequency Range
Crystal reference
External reference
1:1 mode (NOTE: f
sys/2
= 2
×
f
ref_1:1
)
f
ref_crystal
f
ref_ext
f
ref_1:1
8
8
24
25
25
75
MHz
2
Core frequency
CLKOUT Frequency
2
External reference
On-Chip PLL Frequency
f
sys
f
sys/2
0
f
ref
÷
32
150
75
75
MHz
MHz
MHz
3
Loss of Reference Frequency
3, 5
f
LOR
100
1000
kHz
4
Self Clocked Mode Frequency
4, 5
4
f
SCM
10.25
15.25
MHz
5
Crystal Start-up Time
5, 6
5
6
t
cst
10
ms
6
XTAL Load Capacitance
5
5
30
pF
7
PLL Lock Time
5, 7,13
t
lpll
750
μ
s
8
Power-up To Lock Time
5, 6,8
With Crystal Reference (includes 5 time)
Without Crystal Reference
9
t
lplk
11
750
ms
μ
s
9
1:1 Mode Clock Skew (between CLKOUT
and EXTAL)
10
t
skew
–1
1
ns
10
Duty Cycle of reference
5
t
dc
40
60
%
11
Frequency un-LOCK Range
f
UL
–3.8
4.1
% f
sys/2
12
Frequency LOCK Range
f
LCK
–1.7
2.0
% f
sys/2
13
CLKOUT Period Jitter,
5, 6, 8,11, 12
Measured at f
sys/2
Max
Peak-to-peak Jitter (Clock edge to clock
edge)
Long Term Jitter (Averaged over 2 ms
interval)
C
jitter
5.0
.01
% f
sys/2
14
Frequency Modulation Range Limit
13,14
(f
sys/2
Max must not be exceeded)
C
mod
0.8
2.2
%f
sys/2
15
ICO Frequency. f
ico
= f
ref
×
2
×
(MFD+2)
15
f
ico
48
150
MHz
相關PDF資料
PDF描述
MCF5232 Integrated Microprocessor Hardware Specification
MCF5249 CodeWarrior Development Studio for ColdFire㈢ Architectures
MCF5251_07 ColdFire㈢ Microprocessor Data Sheet
MCF5251 ColdFire Processor
MCF5253 ColdFire㈢ Microprocessor Data Sheet
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