參數(shù)資料
型號(hào)： MCF5211
廠商： 飛思卡爾半導(dǎo)體(中國(guó))有限公司
英文描述： ColdFire Microcontroller
中文描述： ColdFire微控制器
文件頁(yè)數(shù)： 30/56頁(yè)
文件大?。?/td> 608K
代理商： MCF5211
MCF5213 ColdFire Microcontroller, Rev. 3
Electrical Characteristics
Freescale Semiconductor
30
2.4
Flash Memory Characteristics
The flash memory characteristics are shown in
Table 23
and
Table 24
.
The average chip-junction temperature (T
J
) in
°
C can be obtained from:
(1)
Where:
T
A
Θ
JA
P
D
P
INT
P
I/O
= ambient temperature,
°
C
= package thermal resistance, junction-to-ambient,
°
C/W
= P
INT
+
P
I/O
= chip internal power, I
DD
×
V
DD
, watts
= power dissipation on input and output pins — user determined, watts
For most applications P
I/O
<
P
INT
and can be ignored. An approximate relationship between P
D
and T
J
(if P
I/O
is neglected) is:
(2)
Solving equations 1 and 2 for K gives:
K = P
D
×
(T
A
+ 273
°
C) +
Θ
JMA
×
P
D 2
(3)
where K is a constant pertaining to the particular part. K can be determined from equation (3) by measuring P
D
(at equilibrium)
for a known T
A
. Using this value of K, the values of P
D
and T
J
can be obtained by solving equations (1) and (2) iteratively for
any value of T
A
.
Table 23. SGFM Flash Program and Erase Characteristics
(V
DDF
= 2.7 to 3.6 V)
Parameter
Symbol
Min
Typ
Max
Unit
System clock (read only)
f
sys(R)
0
—
66.67 or
80
1
1
2
Depending on packaging; see
Table 2
.
Refer to the flash memory section for more information
MHz
System clock (program/erase)
2
f
sys(P/E)
0.15
—
66.67 or
80
1
MHz
Table 24. SGFM Flash Module Life Characteristics
(V
DDF
= 2.7 to 3.6 V)
Parameter
Symbol
Value
Unit
Maximum number of guaranteed program/erase cycles
1
before failure
1
A program/erase cycle is defined as switching the bits from 1
→
0
→
1.
2
Reprogramming of a flash memory array block prior to erase is not required.
P/E
10,000
2
Cycles
Data retention at average operating temperature of 85
°
C
Retention
10
Years
T
J
T
A
P
D
Θ
JMA
×
(
)
+
=
P
D
K
T
J
273
°
C
+
(
)
÷
=
相關(guān)PDF資料
PDF描述
MCF52211 ColdFire Microcontroller
MCF52221 Microcontroller Data Sheet
MCF52223 ColdFire Microcontroller
MCF52235 ColdFire Microcontroller
MCF5232CAB80 Integrated Microprocessor Hardware Specification
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