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參數(shù)資料
| 型號： | MB90W234ZFV |
| 廠商： | FUJITSU LTD |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 16-bit Proprietary Microcontroller |
| 中文描述： | 16-BIT, UVPROM, 16 MHz, MICROCONTROLLER, CQFP100 |
| 封裝： | CERAMIC, LQFP-100 |
| 文件頁數(shù)： | 15/83頁 |
| 文件大小： | 1513K |
| 代理商： | MB90W234ZFV |
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15
MB90230 Series
I
HANDLING DEVICES
1. Preventing Latchup
Latchup may occur on CMOS ICs if voltage higher than V
CC
or lower than V
SS
is applied to input and output pins
other than medium- to high-voltage pins or if higher than the voltage wihich shows on “1. Absolute Maximum
Ratings” in section “
I
Electrical Characteristics” is applied between V
CC
and V
SS
.
When latchup occurs, power supply current increases rapidly and might thermally damage elements. When
using, take great care not to exceed the absolute maximum ratings.
Also, take care to prevent the analog power supply (AV
CC
and AVR) and analog input from exceeding the digital
power supply (V
CC
) when the analog system power supply is turned on and off.
2. Treatment of Unused Pins
Leaving unused input pins open could cause malfunctions. They should be connected to a pull-up or pull-down
resistor.
3. External Reset Input
To reset the internal circuit by the Low-level input to the RST pin, the Low-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.
4. V
CC
and V
SS
Pins
Apply equal potential to the V
CC
and V
SS
pins.
5. Notes on Using an External Clock
When using an external clock, drive the X0 pin as illustrated below:
6. Power-on Sequence for A/D Converter Power Supplies and Analog Inputs
Be sure to turn on the digital power supply (V
CC
) before applying voltage to the A/D converter power supplies
(AV
CC
, AVRH, and AVRL) and analog inputs (AN0 to AN15).
When turning power supplies off, turn off the A/D converter power supplies (AV
CC
, AVRH, and AVRL) and analog
inputs (AN0 to AN15) first, then the digital power supply (AV
CC
).
When turning AVRH on or off, be careful not to let it exceed AV
CC
.
7. Pin set when turning on power supplies
When turning on power supplies, set the hardware standby input pin (HST) to “H”.
Use of External Clock
X0
X1
MB90234
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