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PL-2303 USB to RS-232 Bridge Controller Product Datasheet Document Revision 1.4 Document Release: August, 2002 Prolific Technology Inc. Release Date: July, 2002 ds_pl2303_v14 Revision History Revision 1.4 1.3 1.2 · · · · · · · Description Add Windows CE .NET support feature Buffer for upstream and downstream data flow ­ change from 96 to 256 bytes For Chip Version H (date code 0206) Add OS Support in Features Section Correct default values in Table 5. Device Configuration Register Add Suspend Current in DC Characteristics Section Move Operating Temperature in DC Characteristics to new section Date August 29, 2002 August 01, 2002 July 03, 2002 PL-2303 Product Datasheet -2- Document Revision 1.3 Release Date: July, 2002 ds_pl2303_v14 PL-2303 USB to Serial RS232 Bridge Controller Features Full compliance with the USB Specification v1.1 and USB CDC v1.1 Support the RS232 Serial interface Support automatic handshake mode Support Remote wake-up and power management 256 bytes buffer each for upstream and downstream data flow Support default ROM or external EEPROM for device configuration On chip USB transceiver On chip crystal oscillator running at 12M Hz Supports Windows 98/SE, ME, 2000, XP, Windows CE3.0, CE .NET, Linux, and Mac OS 28 Pins SOIC package SSOP 28 PACKAGE (TOP VIEW) TXD DTR_N RTS_N VDD_232 RXD RI_N GND VDD DSR_N DCD_N CTS_N SHTD_N EE_CLK EE_DATA 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15 OSC2 OSC1 PLL_TEST GND_PLL VDD_PLL LD_MODE TRI_MODE GND VDD RESET GND_3V3 VDD_3V3 DM DP PL-2303 Product Datasheet -3- Document Revision 1.3 Release Date: July, 2002 ds_pl2303_v14 Block Diagram USB Port USB Transceiver REGISTER/ Control Unit USB SIE CONFIG/ STATUS/ CONTROL DOWN STREAM BUFFER UP STREAM BUFFER CLOCK SYNTHESIZE RS-232 SERIAL INTERFACE OSCILLATOR EEPROM INTERFACE Serial Port I2C Bus PL-2303 Product Datasheet -4- Document Revision 1.3 Release Date: July, 2002 ds_pl2303_v14 Overview The PL-2303 operates as a bridge between one USB port and one standard RS232 Serial port. The two large on-chip buffers accommodate data flow from two different buses. The USB bulk-type data is adopted for maximum data transfer. Automatic handshake is supported at the Serial port. With these, a much higher baud rate can be achieved compared to the legacy UART controller. This device is also compliant with USB power management and remote wakeup scheme. Only minimum power is consumed from the host during Suspend. By integrating all the function in a SOIC-28 package, this chip is suitable for cable embedding. Users just simply hook the cable into PC or hub's USB port, and then they can connect to any RS-232 devices. Pin Description Table 1. Pins Description Pin No. 1 2 3 4 Name TXD DTR_N RTS_N VDD_232 Type O O O P Description Data output to Serial port Data Terminal Ready, active low Request To Send, active low RS-232 VDD. The RS-232 output signals (Pin 1 ~ Pin 3) are designed for 5V, 3.3V or 3V operation. VD