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参数资料
| 型号： | MB90822PFV |
| 厂商： | FUJITSU LTD |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 16-BIT, MROM, 24 MHz, MICROCONTROLLER, PQFP80 |
| 封装： | 0.50 MM PITCH, PLASTIC, LQFP-80 |
| 文件页数： | 9/100页 |
| 文件大小： | 1414K |
| 代理商： | MB90822PFV |
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MB90820 Series
16
5.
Power supply pins (VCC/VSS)
If there are multiple VCC and VSS pins, from the point of view of device design, pins to be of the same potential
are connected the inside of the device to prevent such malfunctioning as latch up.
To reduce unnecessary radiation, prevent malfunctioning of the strobe signal due to the rise of ground level,
and observe the standard for total output current, be sure to connect the VCC and VSS pins to the power supply
and ground externally.
Connect VCC and VSS to the device from the current supply source at a low impedance.
As a measure against power supply noise, connect a capacitor of about 0.1
F as a bypass capacitor between
VCC and VSS in the vicinity of VCC and VSS pins of the device.
6.
Pull-up/pull-down resistors
The MB90820 series does not support internal pull-up/pull-down resistors option (Port 0 to Port 3 : built-in pull-
up resistors) . Use external components where needed.
7.
Crystal oscillator circuit
Noises around X0 or X1 pins may be possible causes of abnormal operations. Make sure to provide bypass
capacitors via shortest distance from X0, X1 pins, crystal oscillator (or ceramic oscillator) and ground lines, and
make sure, to the utmost effort, that lines of oscillation circuit do not cross the lines of other circuits while you
design a printed circuit board.
It is highly recommended to provide a printed circuit board art work surrounding X0 and X1 pins with a ground
area for stabilizing the operation.
8.
Turning-on sequence of power supply to A/D converter and D/A converter, and analog inputs
Make sure to turn on the A/D converter power supply, D/A converter power supply (AVCC, AVRH, AVR) and analog
inputs (AN0 to AN15) after turning-on the digital power supply (VCC).
Turn-off the digital power after turning off the A/D converter power supply, D/A converter power supply, and
analog inputs. In this case, make sure that the voltage not exceed AVR or AVCC (turning on/off the analog and
digital power supplies simultaneously is acceptable).
9.
Connection of unused pins of A/D converter and D/A converter if A/D converter and
D/A converter are unused
Connect unused pins of A/D converter and D/A converter to AVCC = VCC, AVSS = AVRH = AVRL = VSS.
10. Notes on energization
To prevent the internal regulator circuit from malfunctioning, set the voltage rise time during energization at
50
s or more (0.2 V to 2.7 V) .
VCC
VSS
MB90820
Series
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MB90823 | 制造商:FUJITSU 制造商全称:Fujitsu Component Limited. 功能描述:16-bit Proprietary Microcontroller |
| MB90823B | 制造商:FUJITSU 制造商全称:Fujitsu Component Limited. 功能描述:16-bit Microcontroller |
| MB90823BPF | 制造商:FUJITSU 制造商全称:Fujitsu Component Limited. 功能描述:16-bit Microcontroller |
| MB90823BPMC | 制造商:FUJITSU 制造商全称:Fujitsu Component Limited. 功能描述:16-bit Microcontroller |
| MB90823BPMC1 | 制造商:FUJITSU 制造商全称:Fujitsu Component Limited. 功能描述:16-bit Microcontroller |
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