FT8U245AM

The FT8U245AM provides an easy cost-effective method of transferring data to / from a peripheral and a host P.C. at up to 8 Million bits ( 1 Megabyte ) per second. FT8U245AM is simple FIFO-like design makes it easy to interface to any CPU ( MCU ) either by mapping the device into the Memory / IO map of the CPU, using DMA or controlling the device via IO ports.

To send data from the peripheral to the host P.C. simply write the byte wide data into the device when the transmitter empty status bit is not active. If the ( 384 byte ) transmit buffer fills up, the FT8U245AM de-asserts transmit empty in order to stop further data being written to the FT8U245AM until some of the FIFO data has been transferred over USB.

When the host P.C. sends data to the peripheral over USB, the FT8U245AM will assert the receiver full status bit to let the peripheral know that data is available. The peripheral then reads the data until the receiver full status bit goes inactive, indicating no more data is available to read.

By using FTDI's virtual COM Port drivers, the peripheral looks like a standard COM Port to the application software. Commands to set the baud rate are ignored the device always transfers data at FT8U245AM's fastest rate regardless of the application's baud rate setting.