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参数资料
| 型号： | MB91133PMT2-XXX |
| 厂商： | FUJITSU LTD |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 32-BIT, FLASH, 33 MHz, RISC MICROCONTROLLER, PQFP144 |
| 封装： | PLASTIC, LQFP-144 |
| 文件页数： | 26/112页 |
| 文件大小： | 508K |
| 代理商： | MB91133PMT2-XXX |
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MB91133/MB91F133A
20
■ HANDLING DEVICES
1.
Points to Note on Handling Devices
(1) Latch-up prevention
Latch-up may occur by CMOS IC if a voltage in excess of VCC5 or lower than VSS is applied to the input/output
pins, or if the voltage exceeds the rating between VCC5 and VSS. If latch-up occurs, the electrical current increases
significantly and may destroy certain components due to excessive heat, so great care must be taken to ensure
that the maximum rating is not exceeded during use.
(2) Handling Pins
Handling unused pins
Input pins that are not used should be pulled up or down as they may cause erroneous operations if left open.
Handling N.C. pins
N.C. pins must be opened for use.
Handling output pins
Excessive electric current may flow if the output pin is shorted by the power source or other output pins, or
connected to large loads. If such status is prolonged, the device is liable to be damaged, so great care must
be taken to ensure that the usage volume does not exceed the maximum rating.
Mode pins (MD0 to MD2)
Those pins must be directly connected to VCC5 or VSS for use.
Pattern lengths between VCC5 or VSS and each mode pin on the printed-circuit board should be arranged to
be as short as possible to prevent the test mode from being erroneously turned on due to noise, and they
should be connected with low impedance.
Power pins
When there are a number of VCC5/VCC3/VSS, those whose electrical potential must be the same within the
device are connected to prevent erroneous operation such as latch-up for device design purposes, but those
must be externally connected to a power source and earthed to follow the general output current standard and
prevent erroneous operation of strobe signals due to increased ground level and reduction in unnecessary
radiation.
Care must also be taken to ensure that they are connected to the VCC5/VSS or VCC3/VSS of this device at the
lowest possible impedance from the source of the electrical current supply.
Furthermore, it is recommended that a ceramic capacitor of around 0.1
F be used to connect the VCC5 and
VSS, or VCC3 and VSS near the device as a bypass capacitor.
Crystal oscillation circuits
Noise near the X0, X1, X0A or X1A pins can cause erroneous operation. The printed-circuit board must be
designed so that the X0, X1, X0A and X1A pins, crystal oscillator (or ceramic oscillator) and bypass capacitor
to the ground can be arranged as close as possible.
Also, a printed-circuit board with grounded artwork enclosing the X0, X1, X0A and X1A pins is strongly
recommended to ensure stable operation.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MB91150 | 制造商:FUJITSU 制造商全称:Fujitsu Component Limited. 功能描述:32-bit Proprietary Microcontrollers |
| MB91151A | 制造商:FUJITSU 制造商全称:Fujitsu Component Limited. 功能描述:32-bit Proprietary Microcontrollers |
| MB91151APMT2-G | 制造商:FUJITSU 制造商全称:Fujitsu Component Limited. 功能描述:32-bit Proprietary Microcontrollers |
| MB91154 | 制造商:FUJITSU 制造商全称:Fujitsu Component Limited. 功能描述:32-bit Proprietary Microcontrollers |
| MB91154PFV-G | 制造商:FUJITSU 制造商全称:Fujitsu Component Limited. 功能描述:32-bit Proprietary Microcontrollers |
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