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UPSD3422 Datasheet(PDF) 161 Page - STMicroelectronics |
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UPSD3422 Datasheet(HTML) 161 Page - STMicroelectronics |
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161 / 300 page  Obsolete Product(s) - Obsolete Product(s) Obsolete Product(s) - Obsolete Product(s) UPSD3422, UPSD3433, UPSD3434, UPSD3454 USB interface 161/300 25.4.1 USB device address register Initially when a device is connected to the USB, it responds to the host on address 0. Using the Set_Address request, the host assigns a unique address to the device. The firmware writes this address to the USB Device Address register (see Table 100), and subsequently the SIE only responds to transactions on that assigned address. This assigned address is in effect until the device or an upstream hub is disconnected from the USB, the host issues a USB Reset, or the host shuts down. The address register is cleared with a Hardware RESET. When a USB RESET is detected, the address register should be cleared. E8 UIF0 GLF INF OUTF NAKF RSTF SUSPNDF EOPF RESUMF 00 USB Global Interrupt Flag E9 UIF1 – – – IN4F IN3F IN2F IN1F IN0F 00 USB IN FIFO Interrupt Flag EA UIF2 – – – OUT4F OUT3F OUT2F OUT1F OUT0F 00 USB OUT FIFO Interrupt Flag EB UIF3 – – – NAK4F NAK3F NAK2F NAK1F NAK0F 00 USB IN FIFO NAK Int. Flag EC UCTL – – – – – USBEN VISIBLE WAKEUP 00 USB Control ED USTA – – – – RCVT SETUP IN OUT 00 USB Status EE RESERVED EF USEL DIR – – – – EP[2:0] 00 USB Endpoint Select F1 UCON – – – – ENABLE STALL TOGGL E BSY 08 USB Endpoint Control F2 USIZE – SIZE[6:0] 00 USB FIFO Valid Size F3 UBASEH BASEADDR[15:8] 00 USB Base Address High F4 UBASEL BASEADDR [7:6] 00 0 0 0 0 00 USB Base Address Low F5 USCI – – – – – USCI[2:0] 00 USB Setup Command Index F6 USCV USCV[7:0] 00 USB Setup Command Value 1. Bits marked with a “–“ are Reserved. Table 99. UPSD34xx USB SFR register map(1) (continued) SFR addr (hex) SFR name Bit name and <bit address> Reset value (hex) Comment 76 5 4 3 2 1 0 Obsolete Product(s) - Obsolete Product(s) |
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