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Chapter 14 Suspend state, the device must limit its current consumption and monitor the bus, exiting the Suspend state when bus ...

Inside USB Each endpoint address except endpoint zero has an endpoint descriptor. The descriptor’s wMaxPacketSize field specifie ...

Chapter 14 data periodically. USB virtual COM-port devices use interrupt transfers to send status information to the host. Isoch ...

Inside USB Halt feature is set. High-speed bulk OUT endpoints can also return a NYET handshake code, which means that the endpoi ...

Chapter 14 Control transfers always use DATA0 in the Setup stage, use DATA1 in the first transaction of the Data stage, toggle t ...

15   "
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  Vendors who offer USB controllers designed specifically for use in virtual COM ports a ...

Chapter 15 
  $ The FT232R USB UART and FT245R USB FIFO are USB controllers that can each appear as a virtual COM po ...

Using Special-function USB Controllers The chip can obtain its power from the VBUS line in the USB cable or from an external sup ...

Chapter 15  3 ?1# @ Figure 15-2 shows the pin functions for the FT245R USB FIFO. The USB interface and power ...

Using Special-function USB Controllers when the CPU can read a byte from the FT245R, and the CPU strobes RD# to read the byte. I ...

Chapter 15 provides access to the pins most often used by microcontroller serial interfaces: data (TX, RX) and flow control (RTS ...

Using Special-function USB Controllers    :     Figure 15-4 shows a circuit that can serve as a virtual CO ...

Chapter 15  8   3  !"  .!6 If you have an existing design that uses RS-232, an FT232R chip can quickly convert the ...

Using Special-function USB Controllers Figure 15-5: To convert a circuit from RS-232 to USB, replace the connections to RS-232 i ...

Chapter 15 For techniques to improve data throughput in the above situations, see FTDI’s application note AN232B-04: Data Throug ...

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  Chapter 15 described how to use USB device controllers designed specifically for virtual COM-por ...

Chapter 16 phones and modems, ISDN terminal adapters, and cell phones. Networking devices include ADSL modems, cable modems, and ...

Using Generic USB Controllers Table 16-1: The CDC communication class interface supports a variety of subclasses. In an interfac ...

Chapter 16 The Ethernet emulation model (EEM) defines an efficient way for devices to send and receive Ethernet frames. Note th ...

Using Generic USB Controllers dows editions and service packs have brought improvements in usbser.sys, so using a recent and upd ...