Справочник Пользователя для Freescale Semiconductor Demonstration Board for Freescale MC9S12XHY256 Microcontroller DEMO9S12XHY256 DEMO9S12XHY256
Модели
DEMO9S12XHY256
Electrical Characteristics
MC9S12XHY-Family Reference Manual, Rev. 1.04
722
Freescale Semiconductor
NOTE
Using the internal voltage regulator, operation is guaranteed in a power
down until a low voltage reset assertion.
down until a low voltage reset assertion.
A.1.8
Power Dissipation and Thermal Characteristics
Power dissipation and thermal characteristics are closely related. The user must assure that the maximum
operating junction temperature is not exceeded. The average chip-junction temperature (T
operating junction temperature is not exceeded. The average chip-junction temperature (T
J
) in
°C can be
obtained from:
NVM logic supply voltage
2
V
DDF
2.7
2.8
2.9
V
Voltage difference V
DDX
to V
DDA
to V
DDM
∆
VDDX
refer to
Voltage difference V
DDR
to V
DDX
∆
VDDR
-0.1
0
0.1
V
Voltage difference V
LCD
to V
DDX
∆
VLCDVDDR
-
-
0.25
V
Voltage difference V
LCD
to V
SSX
∆
VLCDVSSX
-0.25
-
-
V
Voltage difference V
SSX
to V
SSA
∆
VSSX
refer to
Voltage difference V
SS1
, V
SS2
, V
SS3
, V
SSPLL
to V
SSX
∆
VSS
-0.1
0
0.1
V
Digital logic supply voltage
V
DD
1.72
1.8
1.98
V
PLL supply voltage
V
DDPLL
1.72
1.8
1.98
V
Oscillator
3
(Loop Controlled Pierce)
f
osc
4
—
16
MHz
Bus frequency
4
f
bus
0.5
—
40
MHz
Temperature Option C
Operating junction temperature range
Operating ambient temperature range
Operating ambient temperature range
5
TJ
TA
TA
–40
–40
–40
—
27
85
°
C
Temperature Option V
Operating junction temperature range
Operating ambient temperature range
Operating ambient temperature range
TJ
TA
TA
–40
–40
–40
—
27
105
°
C
Temperature Option M
Operating junction temperature range
Operating ambient temperature range
Operating ambient temperature range
TJ
TA
TA
–40
–40
–40
—
27
150
125
125
°
C
1
LCD/Motor Driver pad can only be work under >4.5V
2
The device contains an internal voltage regulator to generate the logic and PLL supply out of the I/O supply.
3
This refers to the oscillator base frequency. Typical crystal & resonator tolerances are supported.
4
Please refer to
for maximum bus frequency limits with frequency modulation enabled
5
Please refer to
for more details about the relation between
ambient temperature T
A
and device junction temperature T
J
.
Table A-4. Operating Conditions
T
J
T
A
P
D
Θ
JA
•
(
)
+
=
T
J
Junction Temperature, [
°
C
]
=
T
A
Ambient Temperature, [
°
C
]
=
P
D
Total Chip Power Dissipation, [W]
=