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ECE1200 Datasheet(PDF) 34 Page - Microchip Technology |
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ECE1200 Datasheet(HTML) 34 Page - Microchip Technology |
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34 / 87 page  ECE1200 DS00003093C Draft-page 34 2018-2021 Microchip Technology Inc. 6.3.1 REGISTER INTERFACE ENABLE / DISABLE The Configuration Port is disabled by default and must be enabled by placing the device into CONFIG MODE. This is done by writing the value 55h into the INDEX location. Any Reset event to the device, including PLTRST#, will again disable the interface, requiring it to be re-enabled by this method. The Configuration Port can also be disabled explicitly by writing the value AAh to the INDEX location. Register accesses will be disabled until the value 55h is again written to the INDEX location. The Configuration Port still claims I/O transfers even while disabled, so the Disabled state does not cause these transfers to be propagated to LPC. FIGURE 6-1: BLOCK DIAGRAM OF REGISTER SET Logical Device 0 Registers Global Registers Logical Device 1 Registers Index = 00h – 2Fh Index = 30h – FFh |
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