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参数资料
| 型号： | MB89557APFT-XXX |
| 厂商： | FUJITSU LTD |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | MICROCONTROLLER, PQFP100 |
| 封装： | 12 X 12 MM, 1.20 MM, 0.40 MM PITCH, PLASTIC, TQFP-100 |
| 文件页数： | 7/52页 |
| 文件大小： | 1354K |
| 代理商： | MB89557APFT-XXX |
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MB89550A Series
DS07-12550-2E
15
■ HANDLING DEVICES
Maximum rated voltage (Prevention of latchup)
Be careful never to exceed maximum rated voltages.
In CMOS IC devices, a condition known as latch-up may occur if voltages higher than Vcc or loser than Vss
are applied to input or output pins other than medium- or high-voltage pins, or if the voltage applied between
Vcc and Vss exceeds the rated voltage level.
When latch-up occurs, the power supply current increases rapidly resulting in thermal damage to circuit
elements. Therefore it is necessary to ensure that maximum ratings are not exceeded in circuit operation.
Similarly, when turning the analog power supply on or off, it is necessary to ensure that the analog power
supply voltages (AVcc, AVR, and DVR) and analog input voltages do not exceed the digital power supply (Vcc).
Power supply voltages
Power supply voltages should be kept as stable as possible.
Rapid fluctuation of the voltage may cause the device to operate abnormally, even if the voltage remains within
the allowed operating range.
As a standard for power supply voltage stability, it is recommended that the peak-to-peak Vcc ripple voltage
at commercial supply frequency (50 Hz to 60 Hz) be 10% or less of Vcc. Also when the power supply is turned
on or off the transient voltage fluctuation be no more than 0.1V/ms or less.
Treatment of unused input pins
Leaving unused input pins unconnected can cause abnormal operation. Unused input pins should always be
pulled up or down.
Treatment of N.C. pins
N.C. (not connected) pins should always be left open.
Treatment of power supply pins on devices with A/D or D/A converters
Even when the A/D or D/A converters are not in use, be sure to make the necessary connections to ensure
that AVCC
= VCC, AVSS = AVR = DVR = VSS.
Precautions on using an external clock
An oscillation stabilization delay occurs after a power-on reset or when recovering from sub-clock or stop
mode, even if an external clock is used.
Treatment of unused dedicated LCD pins
Dedicated SEG output pins should be left open when not in use.
Handling of ports also used as segment pins
When a ports is used as a segment pin, take care to ensure that the voltage applied to the pin does not exceed
V3 (the segment drive voltage). This precaution is particularly necessary in models with step-up voltage circuits.
Note also that after power-on or during a reset, an “L” level default signal is output form the segment/port pin.
Treatment of unused LCD pins
Connect the V3 pin to VCC2. The other dedicated LCD pins V0, V1, V2, C0, and C1 should be pulled down.
Executing programs on RAM
When programs are executed on RAM, debugging cannot be performed even with the use of the MB89PV550A.
Wild register functions
Wild registers cannot be debugged with the MB89PV550A or tools. To verify operation, use the MB89P558A
and perform in-place testing.
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| MB89557APMC-XXX | MICROCONTROLLER, PQFP100 |
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| MB89803PFV | 8-BIT, MROM, 10 MHz, MICROCONTROLLER, PQFP100 |
| MB89803PF | 8-BIT, MROM, 10 MHz, MICROCONTROLLER, PQFP100 |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MB89558A | 制造商:FUJITSU 制造商全称:Fujitsu Component Limited. 功能描述:8-bit Proprietary Microcontroller |
| MB89558APFT-XXX | 制造商:FUJITSU 制造商全称:Fujitsu Component Limited. 功能描述:8-bit Proprietary Microcontroller |
| MB89558APFV-XXX | 制造商:FUJITSU 制造商全称:Fujitsu Component Limited. 功能描述:8-bit Proprietary Microcontroller |
| MB89560A | 制造商:FUJITSU 制造商全称:Fujitsu Component Limited. 功能描述:8-bit Proprietary Microcontroller CMOS |
| MB89560H | 制造商:FUJITSU 制造商全称:Fujitsu Component Limited. 功能描述:8-bit Proprietary Microcontroller CMOS |
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