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参数资料
| 型号： | MB90867ESPF |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 16-BIT, MROM, 24 MHz, MICROCONTROLLER, PQFP100 |
| 封装： | 14 X 20 MM, 3.35 MM HEIGHT, 0.65 MM PITCH, PLASTIC, QFP-100 |
| 文件页数： | 14/68页 |
| 文件大小： | 1040K |
| 代理商： | MB90867ESPF |
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MB90860E Series
21
5.
Sequence for turning on the A/D converter power supply and analog inputs
Make sure to turn on the A/D converter power supply (AVCC, AVRH, AVRL) and analog inputs (AN0 to AN23)
after turning on the digital power supply (VCC) .
Turn off the digital power after turning off the A/D converter power supply and analog inputs. In this case, make
sure that the voltage does not exceed AVRH or AVCC (turning on/off the analog and digital power supplies
simultaneously is acceptable) .
6.
Handling A/D converter pins when the A/D converter is not used
When the A/D converter is not used, connect the pins such that AVCC
= VCC, AVSS = AVRH = AVRL = VSS.
7.
Crystal oscillator circuit
Noise near the X0, X1, X0A, and X1A pins can cause the device to malfunction. Design the printed circuit board
such that the crystal oscillators (or ceramic oscillators) are as close to the X0 and X1 pins, and X0A and X1A
pins as possible, and that the bypass capacitor to ground is as close to the device as possible. Furthermore, try
as much as possible to prevent the wiring for these components from crossing over the wiring of other circuitry.
It is highly recommended that the printed circuit board artwork is designed such that the X0, X1 pins and X0A,
X1A pins are surrounded by ground plane, as this is expected to produce more stable operation.
Please request the oscillator manufacturer to evaluate the oscillational characteristics of the crystal and this
device.
8.
Pull-up/down resistors
The MB90860E series does not support internal pull-up/down resistors (however, port 0 to port 3 have built-in
pull-up resistors). Use external components where needed.
9.
Using external clock
To use an external clock, drive the X0 pin and leave the X1 pin open.
10. Precautions when not using a sub clock signal
If you do not connect pins X0A and X1A to an oscillator, connect the X0A pin to a pull-down resistance and leave
the X1A pin open.
11. Precautions when operating in PLL clock mode
In the MB90860E series, if the oscillator is disconnected or the clock input is stopped while operating in PLL
mode, the microcontroller may continue to operate at the free-running frequency of the self-oscillating circuit
contained in the PLL. However, operation under these circumstances is not guaranteed.
12. Precautions when turning the power on
To prevent the internal regulator circuit from malfunctioning, ensure that the time over which the voltage rises
when the power is turned on is 50 or more
s (0.2 V to 2.7 V)
X0
X1
MB90860E Series
Open
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MB90867ESPFV | 制造商:FUJITSU 制造商全称:Fujitsu Component Limited. 功能描述:16-bit Proprietary Microcontroller |
| MB90880 | 制造商:FUJITSU 制造商全称:Fujitsu Component Limited. 功能描述:16-Bit Proprietary Microcontroller |
| MB90882 | 制造商:FUJITSU 制造商全称:Fujitsu Component Limited. 功能描述:16-Bit Proprietary Microcontroller |
| MB90882PF | 制造商:FUJITSU 制造商全称:Fujitsu Component Limited. 功能描述:16-Bit Proprietary Microcontroller |
| MB90882PMC | 制造商:FUJITSU 制造商全称:Fujitsu Component Limited. 功能描述:16-Bit Proprietary Microcontroller |
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