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数据搜索系统，热门电子元器件搜索 |
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PC87366 数据表(PDF) 160 Page - National Semiconductor (TI) |
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PC87366 数据表(HTML) 160 Page - National Semiconductor (TI) |
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160 / 240 page  9.0 Game Port (GMP) (Continued) 160 www.national.com 9.3.3 Game Port Legacy Status Register (GMPLST) This register is functional in all Game Port operation modes. Reading this register returns the status and the state of Device A and B button and Axis pins, as defined in the table below. Writing to the offset of this register initiates a game device po- sition reading process by forcing a low pulse to be driven on the axis pins in Legacy and Enhanced modes, and by initializing all position counters in Enhanced mode. Location: Offset 01h Type: RO Bit 76543210 Name Device B Button 1 Pin Status Device B Button 0 Pin Status Device A Button 1 Pin Status Device A Button 0 Pin Status Device B Y-Axis Pin Status Device B X-Axis Pin Status Device A Y-Axis Pin Status Device A X-Axis Pin Status Reset XXXXXXXX Bit Description 7 Device B Button 1 Pin Status. This bit directly reflects the status of Device B Button 1 input pin. 0: Low 1: High 6 Device B Button 0 Pin Status. This bit directly reflects the status of Device B Button 0 input pin. 0: Low 1: High 5 Device A Button 1 Pin Status. This bit directly reflects the status of Device A Button 1 input pin. 0: Low 1: High 4 Device A Button 0 Pin Status. This bit directly reflects the status of Device A Button 0 input pin. 0: Low 1: High 3 Device B Y-Axis Pin Status. This bit reflects the state of Device B Y-axis input pin. 0: JOYBY pin is released for charging 1: JOYBY pin is driven low 2 Device B X-Axis Pin Status. This bit reflects the state of Device B X-axis input pin. 0: JOYBX pin is released for charging 1: JOYBX pin is driven low 1 Device A Y-Axis Pin Status. This bit reflects the state of Device A Y-axis input pin. 0: JOYAY pin is released for charging 1: JOYAY pin is driven low 0 Device A X-Axis Pin Status. This bit reflects the status of Device A X-axis input pin. 0: JOYAX pin is released for charging 1: JOYAX pin is driven low |
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