參數(shù)資料
型號(hào)： MC9S12DG256
廠商： Motorola, Inc.
英文描述： MC9S12DT256 Device User Guide V03.03
中文描述： MC9S12DT256設(shè)備的用戶手冊(cè)V03.03
文件頁數(shù)： 87/124頁
文件大?。?/td> 2125K
代理商： MC9S12DG256
87
A.1.4 Current Injection
Power supply must maintain regulation within operating V
DD5
or V
DD
range during instantaneous and
operating maximum current conditions. If positive injection current (V
in
> V
DD5
) is greater than I
DD5
, the
injectioncurrent may flowoutofVDD5 andcouldresult inexternalpowersupply goingoutofregulation.
Ensure external VDD5 load will shunt current greater than maximum injection current. This will be the
greatest risk when the MCU is not consuming power; e.g. if no system clock is present, or if clock rate is
very low which would reduce overall power consumption.
A.1.5 Absolute Maximum Ratings
Absolute maximum ratings are stress ratings only. A functional operation under or outside those maxima
is not guaranteed. Stress beyond those limits may affect the reliability or cause permanent damage of the
device.
This device contains circuitry protecting against damage due to high static voltage or electrical fields;
however, it is advised that normal precautions be taken to avoid application of any voltages higher than
maximum-rated voltages to this high-impedance circuit. Reliability of operation is enhanced if unused
inputs are tied to an appropriate logic voltage level (e.g., either V
SS5
or V
DD5
).
Table A-1 Absolute Maximum Ratings
1
NOTES
:
1. Beyond absolute maximum ratings device might be damaged.
Num
Rating
Symbol
Min
Max
Unit
1
I/O, Regulator and Analog Supply Voltage
V
DD5
-0.3
6.0
V
2
Digital Logic Supply Voltage
2
V
DD
-0.3
3.0
V
3
PLL Supply Voltage
(2)
V
DDPLL
-0.3
3.0
V
4
Voltage difference VDDX to VDDR and VDDA
VDDX
-0.3
0.3
V
5
Voltage difference VSSX to VSSR and VSSA
VSSX
-0.3
0.3
V
6
Digital I/O Input Voltage
V
IN
-0.3
6.0
V
7
Analog Reference
V
RH,
V
RL
-0.3
6.0
V
8
XFC, EXTAL, XTAL inputs
V
ILV
-0.3
3.0
V
9
TEST input
V
TEST
-0.3
10.0
V
10
Instantaneous Maximum Current
Single pin limit for all digital I/O pins
3
I
D
-25
+25
mA
11
Instantaneous Maximum Current
Single pin limit for XFC, EXTAL, XTAL
4
I
DL
-25
+25
mA
12
Instantaneous Maximum Current
Single pin limit for TEST
5
I
DT
-0.25
0
mA
13
Storage Temperature Range
T
stg
– 65
155
°
C
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
.
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