MCF52259 FREESCALE [Freescale Semiconductor, Inc], MCF52259 Datasheet - Page 32

• Manufacturer Part Number: MCF52259
• Description: MCF52259 ColdFire Microcontroller
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

Electrical Characteristics
2.4
The flash memory characteristics are shown in
32
1
2
System clock (read only)
System clock (program/erase)
16
17
18
The average chip-junction temperature (T
Where:
For most applications P
Solving equations 1 and 2 for K gives:
where K is a constant pertaining to the particular part. K can be determined from equation (3) by measuring P
for a known T
any value of T
Depending on packaging; see
Refer to the flash memory section for more information
Thermal resistance between the die and the printed circuit board in conformance with JEDEC JESD51-8. Board
temperature is measured on the top surface of the board near the package.
Thermal resistance between the die and the case top surface as measured by the cold plate method (MIL SPEC-883
Method 1012.1).
Thermal characterization parameter indicating the temperature difference between package top and the junction
temperature per JEDEC JESD51-2. When Greek letters are not available, the thermal characterization parameter is written
in conformance with Psi-JT.
1
2
Maximum number of guaranteed program/erase cycles
Data retention at average operating temperature of 85°C
A program/erase cycle is defined as switching the bits from 1 → 0 → 1.
Reprogramming of a flash memory array block prior to erase is not required.
Flash Memory Characteristics
T
Θ
P
P
P
A
D
INT
I/O
JA
A
A
. Using this value of K, the values of P
.
Parameter
= ambient temperature, °C
= package thermal resistance, junction-to-ambient, °C/W
= P
= chip internal power, I
= power dissipation on input and output pins — user determined, watts
I/O
INT
< P
Table 11. SGFM Flash Program and Erase Characteristics
+ P
INT
K = P
2
Table 12. SGFM Flash Module Life Characteristics
I/O
Table
and can be ignored. An approximate relationship between P
Parameter
D
× (T
12.
MCF52259 ColdFire Microcontroller, Rev. 0
J
A
) in °C can be obtained from:
+ 273 °C) + Θ
P
DD
T
Table 11
D
J
× V
=
=
K
T
(V
(V
DD
A
D
÷
DDF
DDF
+
, watts
and T
Symbol
(
and
f
sys(P/E)
f
T
(
sys(R)
P
J
JMA
= 2.7 to 3.6 V)
= 2.7 to 3.6 V)
1
+
D
Table
before failure
J
273°C
×
can be obtained by solving equations (1) and (2) iteratively for
× P
Θ
JMA
D
12.
)
2
)
(1)
(2)
(3)
0.15
Min
0
Retention
Symbol
P/E
Typ
—
—
D
and T
66.67 or 80
66.67 or 80
10,000
J
Freescale Semiconductor
Value
(if P
10
Max
I/O
2
D
is neglected) is:
(at equilibrium)
1
1
Cycles
Years
Unit
MHz
MHz
Unit