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參數(shù)資料
| 型號(hào)： | MB90495G |
| 廠商： | Fujitsu Limited |
| 英文描述： | 16-bit Proprietary Microcontroller CMOS |
| 中文描述： | 16位微控制器專有的CMOS |
| 文件頁(yè)數(shù)： | 15/92頁(yè) |
| 文件大小： | 450K |
| 代理商： | MB90495G |
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MB90495G Series
15
A/D Converter Power-up and Analog Input Initiation Sequence
Make sure to power up the A/D converter and analog input (pins AN0 to AN7) after turning on digital power
(V
CC
) .
Turn off digital power after turning off the A/D converter power supply and analog inputs. In this case, make
sure that the voltage of AVR does not exceed AV
CC
(it is permissible to turn off analog and digital power
simultaneously) .
Connecting Unused A/D Converter Pins
If you are not using the A/D converter, set unused pins to AV
CC
=
AVR
=
V
CC
, AV
SS
=
V
SS
.
Notes for Powering Up
Ensure that the voltage step-up time (between 0.2 V and 2.7 V) at power-up is no less than 50
μ
s, in order to
prevent malfunction in the built-in step-down circuit.
Initialization
The device contains built-in registers which are only initialized by a power-on reset. Cycle the power supply to
initialize these registers.
Stabilizing the Power Supply
Make sure that the V
CC
power supply voltage is stable. Even at the rated operating V
CC
power supply voltage,
large, sudden changes in the voltage could cause malfunctions. As a standard for stable power supply, keep
V
CC
ripples (peak-to-peak value) at commercial power frequencies (50 Hz to 60 Hz) to no more than 10
%
of the
power supply voltage, and momentary surges caused by switching the power supply and other events to more
than 0.1 V/ms.
If Output from Ports 0/1 Becomes Undefined
After power is turned on, if the RST pin is set to “H” during step-down circuit stabilization standby (during power-
on reset) , ports 0 and 1 output will be undefined. If the RST pin is set to “L”, ports 0 and 1 will go into a high
impedance state. Take careful note of the timing of events outlined in figures 1 and 2.
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| MB90495G_09 | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:16-bit Proprietary Microcontroller |
| MB90497 | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:16-bit Proprietary Microcontroller CMOS |
| MB90497G | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:16-bit Proprietary Microcontroller |
| MB90497GPF | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:16-bit Proprietary Microcontroller |
| MB90497GPFM | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:16-bit Proprietary Microcontroller CMOS |
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