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| 型號(hào)： | MB90F549GSPMC |
| 廠商： | FUJITSU LTD |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 16-BIT, FLASH, 16 MHz, MICROCONTROLLER, PQFP100 |
| 封裝： | 14 X 14 MM, 1.70 MM HEIGHT, 0.40 MM PITCH, PLASTIC, LQFP-100 |
| 文件頁(yè)數(shù)： | 11/72頁(yè) |
| 文件大?。?/td> | 1798K |
| 代理商： | MB90F549GSPMC |
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MB90540G/545G Series
DS07-13703-7E
19
(12) Indeterminate outputs from ports 0 and 1 (MB90V540G only)
During oscillation setting time of step-down circuit (during a power-on reset) after the power is turned on, the
outputs from ports 0 and 1 become following state.
If RST pin is “H”, the outputs become indeterminate.
If RST pin is “L”, the outputs become high-impedance.
Pay attention to the port output timing shown as follow.
Oscillation setting time*2
Power-on reset*1
Period of indeterminated
VCC (Power-supply pin)
PONR (power-on reset) signal
RST (external asynchronous reset) signal
RST (internal reset) signal
Oscillation clock signal
KA (internal operation clock A) signal
KB (internal operation clock B) signal
PORT (port output) signal
*1 : Power-on reset time : “Period of clock frequency”
× 217 (Clock frequency of 16 MHz : 8.19 ms)
*2 : Oscillation setting time : “Period of clock frequency”
× 218 (Clock frequency of 16 MHz : 16.38 ms)
RST pin is “H”
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