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參數(shù)資料
| 型號(hào)： | MB90P214PF |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 16-BIT, OTPROM, 16 MHz, MICROCONTROLLER, PQFP80 |
| 封裝： | PLASTIC, QFP-80 |
| 文件頁數(shù)： | 10/100頁 |
| 文件大?。?/td> | 1681K |
| 代理商： | MB90P214PF |
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17
MB90210 Series
s HANDLING DEVICES
1. Preventing Latchup
CMOS ICs may cause latchup when a voltage higher than VCC or lower than VSS is applied to input or output
pins, or when a voltage exceeding the rating is applied between VCC and VSS.
If latch-up occurs, the power supply current increases rapidly, sometimes resulting in thermal breakdown of the
device. Use meticulous care not to let any voltage exceed the maximum rating.
Also, take care to prevent the analog power supply (AVCC and AVRH) and analog input from exceeding the digital
power supply (VCC) when the analog system power supply is turned on and off.
2. Treatment of Unused Input Pins
Leaving unused input pins open could cause malfunctions. They should be connected to a pull-up or pull-down
resistor.
3. Treatment of Pins when A/D is not Used
Connect to be AVCC = AVRH = VCC and AVSS = AVRL = VSS even if the A/D converter is not in use.
4. Precautions when Using an External Clock
To reset the internal circuit properly by the Low-level input to the RST pin, the “L” level input to the RST pin
must be maintained for at least five machine cycles. Pay attention to it if the chip uses external clock input.
5. VCC and VSS Pins
Apply equal potential to the VCC and VSS pins.
6. Supply Voltage Variation
The operation assurance range for the VCC supply voltage is as given in the ratings. However, sudden changes
in the supply voltage can cause misoperation, even if the voltage remains within the rated range. Therefore, it
is important to supply a stable voltage to the IC. The recommended power supply control guidelines are that
the commercial frequency (50 to 60 Hz) ripple variation (P-P value) on VCC should be less than 10% of the
standard VCC value and that the transient rate of change during sudden changes, such as during power supply
switching, should be less than 0.1 V/ms.
7. Notes on Using an External Clock
When using an external clock, drive the X0 pin as illustrated below. When an external clock is used, oscillation
stabilization time is required even for power-on reset and wake-up from stop mode.
X0
X1
MB90210
Note: When using an external clock, be sure to input external clock more than 6 machine cycles after
setting the HST pin to “L” to transfer to the hardware standby mode.
Use of External Clock
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MB90W214BZF | 16-BIT, UVPROM, 16 MHz, MICROCONTROLLER, CQFP80 |
| MB90214PF | 16-BIT, MROM, 16 MHz, MICROCONTROLLER, PQFP80 |
| MB90P214BPF | 16-BIT, OTPROM, 16 MHz, MICROCONTROLLER, PQFP80 |
| MB90W214ZF | 16-BIT, UVPROM, 16 MHz, MICROCONTROLLER, CQFP80 |
| MB90P653APFV | 16-BIT, OTPROM, 16 MHz, MICROCONTROLLER, PQFP100 |
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