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| 型號： | 22505_1 |
| 英文描述： | AMD Test Interface Port Board Schematics? 149KB (PDF) |
| 中文描述： | AMD測試接口端口板原理圖？ 149KB（PDF格式） |
| 文件頁數(shù)： | 50/78頁 |
| 文件大?。?/td> | 2691K |
| 代理商： | 22505_1 |
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Test Interface Port Board User’s Manual
2-26
Reset Button
The following are the 8-bit and 16-bit addresses for the Interrupt Reset register:
Address: 8-bit = 34Ah, 16-bit = 34Ah
The TIP board provides a reset button, illustrated in Figure 2-11. The reset button
toggles a signal to the host board which then performs a system-wide hardware
reset. The signal connected to the RESET pin on the interface connector (pin 50)
should be an input to the host board and should connect to the main microcontroller
reset. For example, on the élan SC400 microcontroller, this signal is connected
to the RESET input, which is corresponds to the POWERGOOD pin in the AT
system architecture.
Figure 2-11. Reset Button
This same reset can also be performed remotely through pin 9 of the serial ports.
To use this feature, you must remove resistor R32 (for serial port 1) and R42 (for
serial port 0) from the TIP board, then populate resistors R33 and R43 for serial
ports 0 and 1 respectively.
The TIP board discrete registers should not respond to the hardware reset signal.
However, this condition is not certain, even under normal conditions. For example,
a hardware reset should not change the state of the LCD, hex display, discrete
LEDs, discrete inputs, or discrete outputs. A hardware reset does reset the serial
ports and the parallel port.
Alcoswitch FSM4J
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