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Report CopyRight/DMCA Form For : Future Technology Devices International Ltd Ft234xd
FT234XD USB TO BASIC UART IC,Version 1 2,Document No FT 000753 Clearance No FTDI 324. 1 Typical Applications, USB to RS232 RS422 RS485 Converters USB Industrial Control. Upgrading Legacy Peripherals to USB USB FLASH Card Reader and Writers. Utilising USB to add system modularity Set Top Box PC USB interface. Incorporate USB interface to enable PC USB Wireless Modems. transfers for development system,USB Bar Code Readers. communication,USB dongle implementations for Software. Cellular and Cordless Phone USB data transfer,Hardware Encryption and Wireless Modules. cables and interfaces,Detection of dedicated charging port for battery. Interfacing MCU PLD FPGA based designs to,charging at higher supply currents. add USB connectivity,USB Audio and Low Bandwidth Video data. USB Smart Card Readers,USB Instrumentation,1 1 Driver Support. Royalty free VIRTUAL COM PORT Royalty free D2XX Direct Drivers. VCP DRIVERS for USB Drivers DLL S W Interface,Windows 10 32 64 bit Windows 10 32 64 bit. Windows 8 8 1 32 64 bit Windows 8 8 1 32 64 bit,Windows 7 32 64 bit Windows 7 32 64 bit. Windows Vista and Vista 64 bit Windows Vista and Vista 64 bit. Windows XP and XP 64 bit Windows XP and XP 64 bit, Windows 98 98SE ME 2000 Server 2003 XP Windows 98 98SE ME 2000 Server 2003 XP. Server 2008 and server 2012 R2 Server 2008 and server 2012 R2. Windows XP Embedded Windows XP Embedded, Windows CE 4 2 5 0 and 6 0 Windows CE 4 2 5 0 and 6 0. Mac OS 8 9 OS X Linux 2 4 and greater,Linux 2 4 and greater Android J2xx. The drivers listed above are all available to download for free from FTDI website www ftdichip com. Various 3rd party drivers are also available for other operating systems see FTDI website. www ftdichip com for details, For driver installation please refer to http www ftdichip com Documents InstallGuides htm. 1 2 Part Numbers,Part Number Package,FT234XD x 12 Pin DFN. Note Packing codes for x is,R Taped and Reel 5 000pcs per reel. T Tray packing 490pcs per tray, Copyright 2015 Future Technology Devices International Limited 2. FT234XD USB TO BASIC UART IC,Version 1 2,Document No FT 000753 Clearance No FTDI 324. 1 3 USB Compliant, The FT234XD is fully compliant with the USB 2 0 specification and has been given the USB IF Test ID. TID 40001465 Rev D, Copyright 2015 Future Technology Devices International Limited 3. FT234XD USB TO BASIC UART IC,Version 1 2,Document No FT 000753 Clearance No FTDI 324. 2 FT234XD Block Diagram,1V8 Internal,Core Supply,3 3 Volt LDO 1 8 Volt LDO 48MHz Baud Rate. 3V3OUT FIFO RX Buffer,Regulator Regulator Generator. Transceiver,with UART Controller,Serial Interface,Integrated USB UART FIFO with. 1 5k pullups Protocol Engine Controller Programmable. and battery Signal Inversion,charge CBUS0,Internal MTP. FIFO TX Buffer,512 bytes 3V3OUT,X4 Clock Reset,12MHz 48MHz. Multiplier Generator,Oscillator,To USB Transceiver Cell. Figure 2 1 FT234XD Block Diagram, For a description of each function please refer to Section 4. Copyright 2015 Future Technology Devices International Limited 4. FT234XD USB TO BASIC UART IC,Version 1 2,Document No FT 000753 Clearance No FTDI 324. Table of Contents,1 Typical Applications 2,1 1 Driver Support 2. 1 2 Part Numbers 2,1 3 USB Compliant 3,2 FT234XD Block Diagram 4. 3 Device Pin Out and Signal Description 7,3 1 12 Pin DFN Package 7. 3 1 1 DFN Package PinOut Description 7,3 2 CBUS Signal Options 9. 4 Function Description 11,4 1 Key Features 11,4 2 Functional Block Descriptions 11. 5 Devices Characteristics and Ratings 14,5 1 Absolute Maximum Ratings 14. 5 2 DC Characteristics 15,5 3 MTP Memory Reliability Characteristics 19. 5 4 Internal Clock Characteristics 19,6 USB Power Configurations 20. 6 1 USB Bus Powered Configuration 20,6 2 Self Powered Configuration 21. 6 3 USB Bus Powered with Power Switching Configuration 22. 7 Application Examples 23,7 1 USB to RS232 Converter 23. 7 2 USB to RS485 Coverter 24,7 3 USB to RS422 Converter 25. 7 4 USB Battery Charging Detection 26,7 5 LED Interface 27. 8 Internal MTP Memory Configuration 28,8 1 Default Values 28. 8 2 Methods of Programming the MTP Memory 29,8 2 1 Programming the MTP memory over USB 29. 8 3 Memory Map 30,9 Package Parameters 31,9 1 DFN 12 Package Mechanical Dimensions 31. 9 2 DFN 12 Package Markings 32, Copyright 2015 Future Technology Devices International Limited 5. FT234XD USB TO BASIC UART IC,Version 1 2,Document No FT 000753 Clearance No FTDI 324. 9 3 Solder Reflow Profile 33,10 Contact Information 34. Appendix A References 35,Appendix B List of Figures and Tables 36. Appendix C Revision History 37, Copyright 2015 Future Technology Devices International Limited 6. FT234XD USB TO BASIC UART IC,Version 1 2,Document No FT 000753 Clearance No FTDI 324. 3 Device Pin Out and Signal Description,3 1 12 Pin DFN Package. 3V3OUT TXD,Figure 3 1 DFN Schematic Symbol,3 1 1 DFN Package PinOut Description. Note denotes an active low signal,Pin No Name Type Description. 4 5 V or 3 3V supply to IC,9 VCCIO 1 8V 3 3V supply for the IO cells. 3 3V output at 50mA May be used to power VCCIO, 3 When VCC is 3 3V pin 3 is an input pin and should be. 3 3VOUT Output,connected to pin 4,5 13 GND 0V Ground input. Table 3 1 Power and Ground, Pin 13 is the centre pad under the IC Connect to GND. If VCC is 3 3V then 3 3VOUT must also be driven with 3 3V input. Copyright 2015 Future Technology Devices International Limited 7. FT234XD USB TO BASIC UART IC,Version 1 2,Document No FT 000753 Clearance No FTDI 324. Pin No Name Type Description,1 USBDM INPUT OUTPUT USB Data Signal Minus. 12 USBDP INPUT OUTPUT USB Data Signal Plus,2 RESET INPUT Reset input active low. Table 3 2 Common Function pins,Pin No Name Type Description. 7 TXD Output Transmit Asynchronous Data Output,10 RXD Input Receiving Asynchronous Data Input. 8 RTS Output Request to Send Control Output Handshake Signal. 11 CTS Input Clear To Send Control Input Handshake Signal. Configurable CBUS I O Pin Function of this pin is configured in the. 6 CBUS0 I O device MTP memory The default configuration is TXDEN See CBUS. Signal Options Table 3 4, Table 3 3 UART Interface and CBUS Group see note 1. 1 When used in Input Mode the input pins are pulled to VCCIO via internal 75k approx resistors. These pins can be programmed to gently pull low during USB suspend PWREN 1 by setting an. option in the MTP memory, Copyright 2015 Future Technology Devices International Limited 8. FT234XD USB TO BASIC UART IC,Version 1 2,Document No FT 000753 Clearance No FTDI 324. 3 2 CBUS Signal Options, The following options can be configured on the CBUS0 I O pin These options can be configured in the. internal MTP memory using the software utility FT PROG which can be downloaded from the FTDI Utilities. www ftdichip com The default configuration is described in Section 8. CBUS Signal,CBUS Pin Description,TRI STATE CBUS0 IO Pad is tri stated. DRIVE 1 CBUS0 Output a constant 1,DRIVE 0 CBUS0 Output a constant 0. TXDEN CBUS0 Enable transmit data for RS485, Output is low after the device has been configured by. USB then high during USB suspend mode This output, PWREN CBUS0 can be used to control power to external logic P Channel. logic level MOSFET switch Enable the interface pull down. option when using the PWREN in this way, Transmit data LED drive pulses low when transmitting. TXLED CBUS0,data via USB See Section 7 5 for more details. Receive data LED drive pulses low when receiving data. RXLED CBUS0,via USB See Section 7 5 for more details. LED drive pulses low when transmitting or receiving. TX RXLED CBUS0,data via USB See Section 7 5 for more details. Goes low during USB suspend mode Typically used to. SLEEP CBUS0 power down an external TTL to RS232 level converter IC. in USB to RS232 converter designs,CLK24MHz CBUS0 24 MHz Clock output. CLK12MHz CBUS0 12 MHz Clock output,CLK6MHz CBUS0 6 MHz Clock output. CBUS bit bang mode option Allows the CBUS pin to be. used as general purpose I O Configured in the internal. GPIO CBUS0 MTP memory A separate application note AN232R 01. available from FTDI website www ftdichip com describes. in more detail how to use CBUS bit bang mode, Battery Charging Detection indicates when the device is. BCD Charger CBUS0 connected to a dedicated battery charger host Active. high output,BCD Charger CBUS0 Inverse of BCD Charger. Synchronous and asynchronous bit bang mode WR,BitBang WR CBUS0. strobe output,Synchronous and asynchronous bit bang mode RD. BitBang RD CBUS0,strobe output, VBUS Sense CBUS0 Input to detect when VBUS is present. Time Stamp CBUS0 Toggle signal which changes state each time a USB. Copyright 2015 Future Technology Devices International Limited 9. FT234XD USB TO BASIC UART IC,Version 1 2,Document No FT 000753 Clearance No FTDI 324. CBUS Signal,CBUS Pin Description,SOF is received,Prevents the device from entering suspend state. Keep Awake CBUS0,when unplugged,Table 3 4 CBUS Configuration Control. When in USB suspend mode the outputs clocks are also suspended. Copyright 2015 Future Technology Devices International Limited 10. FT234XD USB TO BASIC UART IC,Version 1 2,Document No FT 000753 Clearance No FTDI 324. 4 Function Description, The FT234XD is a compact USB to a basic serial UART interface device which simplifies USB. implementations in a small optimised package The device reduces external component count by fully. integrating an MTP memory and an integrated clock circuit which requires no external crystal It has. been designed to operate efficiently with USB host controllers by using as little bandwidth as possible. when compared to the total USB bandwidth available. 4 1 Key Features, Functional Integration Fully integrated MTP memory clock generation AVCC filtering Power On. Reset POR and LDO regulators, Configurable CBUS I O Pin Options The fully integrated MTP memory allows configuration of the. Control Bus CBUS functionality and drive strength selection There is one CBUS I O pin CBUS0 The. configurable options of CBUS0 are detailed in section 3 2. The CBUS line can be configured with any one of these output options by setting bits in the internal MTP. memory The device is shipped with the most commonly used pin definitions pre programmed see. Section 8 for details, Asynchronous Bit Bang Mode with RD and WR Strobes The FT234XD supports FTDI s previous. chip generation bit bang mode In bit bang mode the four UART lines can be switched from the regular. interface mode to a 4 bit general purpose I O port Data packets can be sent to the device and they will. be sequentially sent to the interface at a rate controlled by an internal timer equivalent to the baud rate. pre scalar Either the internal RD or the internal WR strobe signal can mapped to the CBUS0 pin. only one CBUS pin available which can be used to allow external logic to be clocked by access to the. bit bang I O bus This option will be described more fully in a separate application note available from. FTDI website www ftdichip com, Synchronous Bit Bang Mode The FT234XD supports synchronous bit bang mode This mode differs. from asynchronous bit bang mode in that the interface pins are only read when the device is written to. This makes it easier for the controlling program to measure the response to an output stimulus as the. data returned is synchronous to the output data An application note AN232R 01 available from FTDI. website www ftdichip com describes this feature, Source Power and Power Consumption The FT234XD is capable of operating at a voltage supply. between 3 3V and 5 25V with a nominal operational mode current of 8mA and a nominal USB suspend. mode current of 125 A This allows greater margin for peripheral designs to meet the USB suspend mode. current limit of 2 5mA An integrated level converter within the UART interface allows the FT234XD to. interface to UART logic running at 1 8V to 3 3V 5V tolerant. 4 2 Functional Block Descriptions, The following paragraphs detail each function within the FT234XD Please refer to the block diagram. shown in Figure 2 1, Internal MTP Memory The internal MTP memory in the FT234XD is used to store USB Vendor ID VID. Product ID PID device serial number product description string and various other USB configuration. descriptors The internal MTP memory is also used to configure the CBUS pin functions The FT234XD is. supplied with the internal MTP memory pre programmed as described in Section 8 A user area of the. internal MTP memory is available to system designers to allow storing additional data from the user. application over USB The internal MTP memory descriptors can be programmed in circuit over USB. without any additional voltage requirement The descriptors can be programmed using the FTDI utility. software called FT PROG which can be downloaded from FTDI Utilities on the FTDI website. www ftdichip com, 3 3V LDO Regulator The 3 3V LDO regulator generates the 3 3V 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 It also provides 3 3V power to the 1 5k internal pull up resistor on. USBDP The main function of the LDO is to power the USB Transceiver and the Reset Generator Cells. rather than to power external logic However it can be used to supply external circuitry requiring a. 3 3V nominal supply with a maximum current of 50mA. 1 8V LDO Regulator The 1 8V LDO regulator generates the 1 8V reference voltage for internal use. driving the IC core functions of the serial interface engine and USB protocol engine. Copyright 2015 Future Technology Devices International Limited 11. FT234XD USB TO BASIC UART IC,Version 1 2,Document No FT 000753 Clearance No FTDI 324. USB Transceiver The USB Transceiver Cell provides the USB 1 1 USB 2 0 full speed physical interface. to the USB cable The output drivers provide 3 3V level slew rate control signalling whilst a differential. input receiver and two single ended input receivers provide USB data in Single Ended 0 SE0 and USB. reset detection conditions respectfully This function also incorporates a 1 5k pull up resistor on USBDP. The block also detects when connected to a USB power supply which will not enumerate the device but. still supply power and may be used for battery charging. USB DPLL The USB DPLL cell locks on to the incoming NRZI USB data and generates recovered clock. and data signals for the Serial Interface Engine SIE block. Internal 12MHz Oscillator The Internal 12MHz Oscillator cell generates a 12MHz reference clock This. provides an input to the x4 Clock Multiplier function The 12MHz Oscillator is also used as the reference. clock for the SIE USB Protocol Engine and UART FIFO controller blocks. Clock Multiplier Divider The Clock Multiplier Divider takes the 12MHz input from the Internal. Oscillator function and generates the 48MHz 24MHz 12MHz and 6MHz reference clock signals The 48Mz. clock reference is used by the USB DPLL and the Baud Rate Generator blocks. 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 with the USB 2 0 specification it. performs bit stuffing un stuffing and CRC5 CRC16 generation It also verifies the CRC on the USB data. USB Protocol Engine The USB Protocol Engine manages the data stream from the device USB control. endpoint It handles the low level USB protocol requests generated by the USB host controller and the. commands for controlling the functional parameters of the UART in accordance with the USB 2 0. specification chapter 9, FIFO RX Buffer 512 bytes Data sent from the USB host controller to the UART via the USB data OUT. endpoint is stored in the FIFO RX receive buffer Data is removed from the buffer to the UART transmit. register under control of the UART FIFO controller Rx relative to the USB interface. FIFO TX Buffer 512 bytes Data from the UART receive register is stored in the TX buffer The USB. host controller removes data from the FIFO TX Buffer by sending a USB request for data from the device. data IN endpoint Tx relative to the USB interface, UART FIFO Controller The UART FIFO controller handles the transfer of data between the FIFO RX and. TX buffers and the UART transmit and receive registers. UART Controller with Programmable Signal Inversion and High Drive Together with the UART. FIFO Controller the UART Controller handles the transfer of data between the FIFO RX and FIFO TX. buffers and the UART transmit and receive registers It performs asynchronous 7 or 8 bit parallel to serial. and serial to parallel conversion of the data on the RS232 or RS422 or RS485 interface. Control signals supported by UART mode include RTS CTS The UART Controller also provides a. transmitter enable control signal pin option TXDEN to assist with interfacing to RS485 transceivers. RTS CTS and XON XOFF handshaking options are also supported Handshaking is handled in hardware to. ensure fast response times The UART interface also supports the RS232 BREAK setting and detection. conditions, Additionally the UART signals can each be individually inverted and have a configurable high drive. strength capability using FT PROG Both these features are configurable in the MTP memory. Baud Rate Generator The Baud Rate Generator provides a 16x clock input to the UART Controller. from the 48MHz reference clock It consists of a 14 bit pre scalar and 3 register bits which provide fine. tuning of the baud rate used to divide by a number plus a fraction or sub integer This determines the. baud rate of the UART which is programmable from 183 baud to 3 Mbaud. The FT234XD supports all standard baud rates and non standard baud rates from 183 Baud up to 3. Mbaud Achievable non standard baud rates are calculated as follows. Baud Rate 3000000 n x, Where n can be any integer between 2 and 16 384 2 and x can be a sub integer of the value 0. 0 125 0 25 0 375 0 5 0 625 0 75 or 0 875 When n 1 x 0 i e baud rate divisors with values. between 1 and 2 are not possible, This gives achievable baud rates in the range 183 1 baud to 3 000 000 baud When a non standard baud. rate is required simply pass the required baud rate value to the driver as normal and the FTDI driver will. calculate the required divisor and set the baud rate See FTDI application note AN232B 05 on the FTDI. website www ftdichip com for more details, Copyright 2015 Future Technology Devices International Limited 12. FT234XD USB TO BASIC UART IC,Version 1 2,Document No FT 000753 Clearance No FTDI 324. RESET Generator The integrated Reset Generator Cell provides a reliable power on reset to the device. internal circuitry at power up The RESET input pin allows an external device to reset the FT234XD. RESET can be tied to VCC or left unconnected if not being used. Copyright 2015 Future Technology Devices International Limited 13. FT234XD USB TO BASIC UART IC,Version 1 2,Document No FT 000753 Clearance No FTDI 324. 5 Devices Characteristics and Ratings,5 1 Absolute Maximum Ratings. The absolute maximum ratings for the FT234XD devices are as follows These are in accordance with the. Absolute Maximum Rating System IEC 60134 Exceeding these may cause permanent damage to the. Parameter Value Unit Conditions,Storage Temperature 65 C to 150 C Degrees C. Floor Life Out of Bag At Factory Ambient IPC JEDEC J. STD 033A MSL Hours,30 C 60 Relative Humidity,Ambient Operating Temperature Power. 40 C to 85 C Degrees C,MTTF FT234XD TBD Hours,VCC Supply Voltage 0 3 to 5 5 V. VCCIO IO Voltage 0 3 to 4 0 V,DC Input Voltage USBDP and USBDM 0 5 to 3 63 V. DC Input Voltage High Impedance,0 3 to 5 8 V,Bi directional powered from VCCIO. DC Output Current Outputs 22 mA,Table 5 1 Absolute Maximum Ratings. If devices are stored out of the packaging beyond this time limit the devices should be baked before. use The devices should be ramped up to a temperature of 125 C and baked for up to 17 hours. Copyright 2015 Future Technology Devices International Limited 14. FT234XD USB TO BASIC UART IC,Version 1 2,Document No FT 000753 Clearance No FTDI 324. 5 2 DC Characteristics, DC Characteristics Ambient Temperature 40 C to 85 C. Parameter Description Minimum Typical Maximum Units Conditions. VCC Operating Supply,VCC 2 97 5 5 5 V Normal Operation. VCCIO Operating,VCC2 1 62 3 63 V,Supply Voltage,Operating Supply. Icc1 6 5 8 8 3 mA Normal Operation,Operating Supply. Icc2 125 A USB Suspend,VCC must be,greater than 3V3. otherwise 3V3OUT,3V3 3 3v regulator output 2 97 3 3 3 63 V. is an input which,must be driven,Table 5 2 Operating Voltage and Current. Copyright 2015 Future Technology Devices International Limited 15.
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