SK-FR80-120PMC-USB Fujitsu, SK-FR80-120PMC-USB Datasheet - Page 80

• Manufacturer Part Number: SK-FR80-120PMC-USB
• Description: BOARD, EVAL, FOR MB91660 SERIES
• Manufacturer: Fujitsu
• Type: Evaluation Boardr

Specifications of SK-FR80-120PMC-USB

• Kit Features: External FRAM Memory MB85RS256, USB A & USB A Connectors, USB To Serial Converter
• Mcu Supported Families: MB91660
• Silicon Manufacturer: Fujitsu
• Core Architecture: FR80
• Kit Contents: Board, USB A To Mini-B Cable
• Features: USB Connector, 7-segment LED, Humidity Sensor
• Rohs Compliant: No
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

5.3.2
USB initialization process
The figure below shows the details of the USB initialization process.
Start
USB operation enabled (USBEN=1)
Bus reset (RST=1)
USB register initial settings
- Bus power supply (PWC=0)
- EP0 setting (64 bytes)
- EP1 setting (INT-IN transfer/ 64 bytes)
Release bus reset (RST=0)
Clear EP0/EP1 receive buffer
Set V-BUS detection pin (PH3)
No
V-BUS detected?
Yes
Connect to HOST (HCONX = 0)
Enable USB Function interrupt
End
Figure 5.3.2-1 Operating flow of the USB initialization process (usb_mouse_ctrl.c)
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