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參數(shù)資料
| 型號： | MAC7101VVF |
| 廠商： | Motorola, Inc. |
| 英文描述： | Handheld Infrared Thermometer; Temperature Measuring Range:-20 C to 500 C; Response Time:500ms; Accuracy: 1% |
| 中文描述： | MAC7100微控制器系列硬件規(guī)格 |
| 文件頁數(shù)： | 8/48頁 |
| 文件大小： | 1514K |
| 代理商： | MAC7101VVF |
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8
MAC7100 Microcontroller Family Hardware Specifications
PRELIMINARY—SUBJECT TO CHANGE WITHOUT NOTICE
For More Information On This Product,
Go to: www.freescale.com
MOTOROLA
Electrical Characteristics
3.6
Power Supply
The MAC7100 Family utilizes several pins to supply power to the oscillator, PLL, digital core, I/O ports
and ATD. In the context of this section, V
DD
5 is used for V
DD
A, V
DD
R or V
DD
X; V
SS
5 is used for V
SS
A,
V
SS
R or V
SS
X unless otherwise noted. I
DD
5 denotes the sum of the currents flowing into the V
DD
A, V
DD
X,
and V
DD
R. V
DD
is used for V
DD
2.5, and V
DD
PLL, V
SS
is used for V
SS
2.5 and V
SS
PLL. I
DD
is used for the
sum of the currents flowing into V
DD
2.5 and V
DD
PLL.
3.6.1
Current Injection
The power supply must maintain regulation within the V
DD
5 or V
DD
2.5 operating range during
instantaneous and operating maximum current conditions. If positive injection current (V
in
> V
DD
5) is
greater than I
DD
5, the injection current may flow out of V
DD
5 and could result in the external power supply
going out of regulation. It is important to ensure that the external V
DD
5 load will shunt current greater than
the maximum injection current. The greatest risk will be when the MCU is consuming very little power (for
example, if no system clock is present, or if the clock rate is very low).
3.6.2
Power Supply Pins
The V
DD
R – V
SS
R pair supplies the internal voltage regulator. The V
DD
A – V
SS
A pair supplies the A/D
converter and the reference circuit of the internal voltage regulator. The V
DD
X – V
SS
X pair supplies the I/O
pins. V
DD
PLL – V
SS
PLL pair supplies the oscillator and PLL.
All V
DD
X pins are internally connected by metal. All V
SS
X pins are internally connected by metal. All
V
SS
2.5 pins are internally connected by metal. V
DD
A, V
DD
X and V
DD
R as well as V
SS
A, V
SS
X and V
SS
R
are connected by anti-parallel diodes for ESD protection.
3.6.3
Supply Currents
All current measurements are without output loads. Unless otherwise noted the currents are measured in
single chip mode, internal voltage regulator enabled and at 40MHz bus frequency using a 4MHz oscillator
in low power mode. Production testing is performed using a square wave signal at the EXTAL input.
In expanded modes, the currents flowing in the system are highly dependent on the load at the address, data
and control signals as well as on the duty cycle of those signals. No generally applicable numbers can be
given. A good estimate is to take the single chip currents and add the currents due to the external loads.
Table 11. Power Dissipation 1/8 Simulation Model Packaging Parameters
Component
Conductivity
Mold Compound
Leadframe (Copper)
Die Attach
0.9 W/m K
263 W/m K
1.7 W/m K
F
Freescale Semiconductor, Inc.
n
.
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