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参数资料
| 型号： | MB91108PFV |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 32-BIT, 50 MHz, RISC MICROCONTROLLER, PQFP120 |
| 封装： | PLASTIC, LQFP-120 |
| 文件页数： | 6/96页 |
| 文件大小： | 1342K |
| 代理商： | MB91108PFV |
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MB91107/108
14
s HANDLING DEVICES
1.
Preventing Latchup
In CMOS ICs, applying voltage higher than VCC or lower than VSS to input/output pin or applying voltage over
rating across VCC and VSS may cause latchup.
This phenomenon rapidly increases the power supply current, which may result in thermal breakdown of the
device. Make sure to prevent the voltage from exceeding the maximum rating.
2.
Treatment of Pins
Treatment of unused pins
Unused pins left open may cause malfunctions. Make sure to connect them to pull-up or pull-down resistors.
Handling the output pins
Connecting an output pin to the power supply, to another output pin, or to a large-capacitance load may cause
a large current to flow. Since letting it flow for an extended period of time degrades the device, be careful in
using the device not to exceed the maximum rating.
Power supply pins
When there are several VCC and VSS pins, each of them is equipotentially connected to its counterpart inside of
the device, minimizing the risk of malfunctions such as latch up. To further reduce the risk of malfunctions, to
prevent EMI radiation, to prevent strobe signal malfunction resulting from creeping-up of ground level and to
observe the total output current standard, connect all VCC and VSS pins to the power supply or GND.
It is preferred to connect VCC and VSS of MB91107 to power supply with minimal impedance possible.
It is also recommended to connect a ceramic capacitor as a bypass capacitor of about 0.1
F between VCC and
VSS at a position as close as possible to MB91107.
Mode setting pins (MD0 to MD2)
Connect mode setting pins (MD0 to MD2) directly to VCC or VSS.
Arrange each mode setting pin and VCC or VSS patterns on the printed circuit board as close as possible and
make the impedance between them minimal to prevent mistaken entrance to the test mode caused by noises.
Crystal oscillator circuit
Noises around X0 and X1 pins may cause malfunctions of MB91101. In designing the PC board, layout X0, X1
and crystal oscillator (or ceramic oscillator) and bypass capacitor for grounding as close as possible.
It is strongly recommended to design PC board so that X1 and X0 pins are surrounded by grounding area for
stable operation.
3.
Notes on Use
External reset input
The RST pin requires "L" level input for at least five machine cycles before the the internal circuitry can be
completely reset.
External clock
To use an external clock, in principle, supply the X0 and X1 pins with a clock signal opposite in phase to the X0.
To use the STOP mode (oscillation stop mode) along with the external clock, in which the X1 pin stops with "H"
output, you should insert an external resistor of about 1 kilohm to prevent a collision between outputs.
Given the next page is an example of using an external clock.
相关PDF资料 |
PDF描述 |
|---|---|
| MB91107PFV | 32-BIT, 50 MHz, RISC MICROCONTROLLER, PQFP120 |
| MB91110PMT2 | 32-BIT, 50 MHz, RISC MICROCONTROLLER, PQFP144 |
| MB91110PMT2 | 32-BIT, 50 MHz, RISC MICROCONTROLLER, PQFP144 |
| MB91121PFV | 32-BIT, 50 MHz, RISC MICROCONTROLLER, PQFP120 |
| MB91154PFV-G-XXX | 32-BIT, MROM, 33 MHz, RISC MICROCONTROLLER, PQFP144 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MB91110 | 制造商:FUJITSU 制造商全称:Fujitsu Component Limited. 功能描述:32-Bit RISC Microcontroller |
| MB911110PMT2 | 制造商:FUJITSU 制造商全称:Fujitsu Component Limited. 功能描述:32-Bit RISC Microcontroller |
| MB91121 | 制造商:FUJITSU 制造商全称:Fujitsu Component Limited. 功能描述:32-bit RISC Microcontroller |
| MB91121PFV | 制造商:FUJITSU 制造商全称:Fujitsu Component Limited. 功能描述:32-bit RISC Microcontroller CMOS |
| MB91133 | 制造商:FUJITSU 制造商全称:Fujitsu Component Limited. 功能描述:32-Bit RISC Microcontroller |
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