參數(shù)資料
型號: MC9S12B128VPV25
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 16-BIT, FLASH, 25 MHz, MICROCONTROLLER, PQFP112
封裝: LQFP-112
文件頁數(shù): 118/132頁
文件大?。?/td> 1842K
代理商: MC9S12B128VPV25
Device User Guide — 9S12B128DGV1/D V01.13
86
The total power dissipation can be calculated from:
Two cases with internal voltage regulator enabled and disabled must be considered:
1.
Internal Voltage Regulator disabled
PIO is the sum of all output currents on I/O ports associated with VDDX and VDDR.
For RDSON is valid:
respectively
2.
Internal voltage regulator enabled
IDDR is the current shown in Table A-8 and not the overall current flowing into VDDR, which
additionally contains the current flowing into the external loads with output high.
PIO is the sum of all output currents on I/O ports associated with VDDX and VDDR.
P
D
Total Chip Power Dissipation, [W]
=
Θ
JA
Package Thermal Resistance, [
°C/W]
=
P
D
P
INT
P
IO
+
=
P
INT
Chip Internal Power Dissipation, [W]
=
P
INT
I
DD
V
DD
I
DDPLL
V
DDPLL
I
DDA
+V
DDA
+
=
P
IO
R
DSON
i
I
IO
i
2
=
R
DSON
V
OL
I
OL
------------ for outputs driven low
;
=
R
DSON
V
DD5
V
OH
I
OH
------------------------------------ for outputs driven high
;
=
P
INT
I
DDR
V
DDR
I
DDA
V
DDA
+
=
P
IO
R
DSON
i
I
IO
i
2
=
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