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5.2 : PCIe Switch ................................................................................................................................. 83
5.3 : Microcontroller Interface .............................................................................................................. 84
5.3.1 : Microcontroller Serial Port ......................................................................................................................84
5.3.2 : Microcontroller Serial Port Commands ..................................................................................................85
5.3.2.1 : Select I2C Bus .................................................................................................................................85
5.3.2.2 : Select I2C Slave Address ................................................................................................................86
5.3.2.3 : Raw I2C Read .................................................................................................................................86
5.3.2.4 : Raw I2C Write ..................................................................................................................................86
5.3.2.5 : VP3500 Board-Specific Information .................................................................................................87
5.3.2.6 : VP3500 Board Status ......................................................................................................................87
5.3.2.7 : Toggle MiniPCIe Wireless Disable ...................................................................................................88
5.3.2.8 : Toggle Board Power ........................................................................................................................88
5.3.2.9 : Read EEPROM ................................................................................................................................88
5.3.2.10 : Write EEPROM ..............................................................................................................................88
5.3.3.1 : Read Power Status ..........................................................................................................................90
5.3.3.2 : Read Board Serial Number ..............................................................................................................91
5.3.3.3 : PEX8648 PCIe Switch Port 0-9 Status ............................................................................................91
5.3.3.4 : EEPROM Read / Write ....................................................................................................................92
5.3.3.5 : Read Temperature ...........................................................................................................................92
5.3.3.6 : Set High / Low Alert Temperature Limits ..........................................................................................92
5.3.3.7 : PMC / XMC Status ...........................................................................................................................93
5.3.3.8 : MiniPCIe Wireless Enable / Disable ................................................................................................93
5.3.3.9 : MiniPCIe Wireless Status ................................................................................................................93
5.3.3.10 : Clear ..............................................................................................................................................94
5.3.3.11 : I2C Bus Select 1-4 .........................................................................................................................94
5.3.3.12 : I2C Slave Address .........................................................................................................................94
5.3.3.13 : Raw I2C Read / Write ....................................................................................................................94
5.3.3.14 : Programming Example ..................................................................................................................95
VP3500 User Manual • Document Number 101-3500-0001 • Revision A0
Property of Rigel Engineering, LLC. Confidential & Proprietary
690 Cone Park Court, Merritt Island, Florida 32952
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