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Details, datasheet, quote on part number:FT8U232AM
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| Part: | FT8U232AM |
| Category: | Communication => UARTs |
| Description: | U-uart - Usb Ultrabaud Data Transfer ic With Rs232 /rs422 And Cpu I/f Options |
| Company: | Future Technology Devices Intl Ltd. |
| Datasheet: | Download FT8U232AM datasheet File size : 41 kB |
| Request For quote: | Find where to buy FT8U232AM
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Datasheet text preview:
FT8U232AM
U-UART - USB UltraBaud Data Transfer IC with RS232 / RS422 and CPU I/F Options FEATURES
· · · · · · · · · · · · · · Single Chip Multi-Function Data Transfer Solution RS232 link from 300 baud to 920K baud RS422/RS485 Link to 2000K baud 384 byte receive buffer / 128 byte transmit buffer for high data throughput Full hardware assisted or X-On/X-Off handshaking Support for Event Characters and Line Break condition Auto Transmit Buffer control for RS485 Compact 32 pin ( 7mm x 7mm ) MQFP package Integrated 6MHz - 48MHz Clock Multiplier aids FCC and CE compliance Integrated 3.3v Regulator No External Regulator Required 4.4v .. 5.25v Single Supply Operation UHCI / OHCI Compliant USB 1.1 Specification Compliant USB VID, PID, Serial Number and Product Description Strings in external E2PROM. · Virtual COM Port Drivers for Windows 98 and Windows 98 SE Windows 2000 Windows Millennium ** Apple iMAC ** Linux ** Application Areas USB ISDN and ADSL Modems
Ù PDA Interface Cables USB Ù RS232 Converters / Cables USB Ù RS422 / RS485 High Speed Industrial
USB Links USB Digital Cameras USB I/F for MP3 players Ultra-high performance Serial Port for legacy free PC system boards / Easy PC's
USB 56k / V90 Modems
Ù USB data transfer cables USB Ù USB null-modem cables USB ÙSerial Bar Code Readers
USB
USB Instrumentation
Note ** = Currently in development
GENERAL DESCRIPTION
The FT8U232AM is a cost-effective single chip USB UART ( U-UART ) solution for transferring serial data over USB. With data transfer rates of up to 920k baud ( RS232 ) and 2,000 k baud ( RS422 / RS485 ) , the FT8U232AM significantly raises the performance level above that above that of traditional ISA and PCI based UART solutions whilst offering true plug and play and easy interfacing through it's USB interface. Its flexible architecture allows this IC to be used in many different application areas - USB modems, Legacy RS232
Ù USB Converter cables, USB interface cables for PDA's , Bar Code Scanners , RS422 data links
and instrumentation in fact almost any equipment that previously used a slow RS232 link for communication. Virtual COM port drivers are available for the FT8U232AM for Windows '98, Windows 98 SE and Windows 2000. Drivers for other operating systems are currently under development.
Future Technology Devices Intl.
FT8U232AM Preliminary Information Rev 0.8 Subject to Change
Figure 1 FT8U232AM Block Diagram ( Simplified )
VCC 48MHz Baud Rate Generator
3V3OUT
3.3 Volt LDO Regulator
Dual Port TX Buffer 128 bytes
USBDP USB Transceiver USBDM Serial Interface Engine ( SIE ) USB Protocol Engine UART FIFO Controller UART
TXD RXD RTS# CTS# DTR# DSR# DCD# RI#
TXDEN USBEN TXLED# RXLED# Dual Port RX Buffer 384 Bytes EECS EESK EEDATA
USB DPLL
EEPROM Interface XTOUT 6MHZ Oscillator XTIN x8 Clock Multiplier 12MHz 48MHz GND RESET# TEST
SLEEP# PWRCTL
RCCLK
Figure 2 FT8U232AM I.C. Pinout
RCCLK XTOUT
EECS
AVCC
AGND
XTIN
VCC
32 EESK EEDATA VCC RESET# TEST 3V3OUT USBDP USBDM 8 9 1
25 24 RXD RTS# CTS# DTR# DSR# DCD# RI# 17 16 GND
FTDI
FT232AM
XXYY
VCC
RXLED#
PWRCTL
Future Technology Devices Intl.
FT8U232AM Preliminary Information Rev 0.8 Subject to Change
SLEEP#
TXLED#
USBEN
TXDEN
GND
TXD
FT8U232AM - FUNCTIONAL BLOCK DESCRIPTION
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3.3V LDO Regulator The 3.3V LDO Regulator generates the 3.3 volt reference voltage for driving the USB transceiver cell output buffers. It requires an external decoupling capacitor to be attached to the 3V3OUT regulator output pin.
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USB Transceiver The USB Transceiver Cell provides the USB 1.1 full-speed physical interface to the USB cable. The output drivers provide 3.3 volt level slew rate control signalling, whilst a differential receiver and two single ended receivers provide USB data in, SEO and USB Reset condition detection.
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USB DPLL The USB DPLL cell locks on to the incoming NRZI USB data and provides separate recovered clock and data signals to the SIE block.
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6MHz Oscillator The 6MHz Oscillator cell generates a 6MHz reference clock input to the X8 Clock multiplier from an external 6MHz crystal or ceramic resonator.
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X8 Clock Multiplier The X8 Clock Multiplier takes the 6MHz input from the Oscillator cell and generates a 12MHz reference clock for the SIE, USB Protocol Engine and UART FIFO controller blocks. It also generates a 48MHz reference clock for the USB DPPL and the Baud Rate Generator blocks.
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Serial Interface Engine ( SIE ) The Serial Interface Engine ( SIE ) block performs the Parallel to Serial and Serial to Parallel conversion of the USB data. In accordance to the USB 1.1 specification, it performs bit stuffing / un-stuffing and CRC5 / CRC16 generation / checking on the USB data stream.
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USB Protocol Engine The USB Protocol Engine manages the data stream from the device USB control endpoint. It handles the low level USB protocol ( Chapter 9 ) requests generated by the USB host controller and the commands for controlling the functional parameters of the UART.
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Dual Port TX Buffer ( 128 bytes ) Data from the USB data out endpoint is stored in the Dual Port TX buffer and removed from the buffer to the UART transmit register under control of the UART FIFO controller.
Future Technology Devices Intl.
FT8U232AM Preliminary Information Rev 0.8 Subject to Change
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