AU9720

Data Book AU9720 USB to Serial Bridge Controller Technical Reference Manual Product Specification Official Release Revision 1.05W Public Apr 2005 Data Sheet Status Objective specification Preliminary specification Product specification This data sheet contains target or goal specifications for product development. This data sheet contains preliminary data; supplementary data may be published later. This data sheet contains final product specifications. Revision History Date Apr. 2005 Revision 1.05W Description Removed the schematics. Please contact our sales if you need it. Page 2 of 16 AU9720 USB to Serial Bridge Controller V1.05W Official release_ Public Copyright Notice Copyright 1997 - 2005 Alcor Micro Corp. All Rights Reserved. Trademark Acknowledgements The company and product names mentioned in this document may be the trademarks or registered trademarks of their manufacturers. Disclaimer Alcor Micro Corp. reserves the right to change this product without prior notice. Alcor Micro Corp. makes no warranty for the use of its products and bears no responsibility for any error that appear in this document. Specifications are subject to change without prior notice. Contact Information: Web site: http://www.alcormicro.com/ Taiwan Alcor Micro Corp. 4F, No 200 Kang Chien Rd., Nei Hu, Taipei, Taiwan, R.O.C. Phone: 886-2-8751-1984 Fax: 886-2-2659-7723 Santa Clara Office 2901 Tasman Drive, Suite 206 Santa Clara, CA 95054 USA Phone: (408) 845-9300 Fax: (408) 845-9086 Los Angeles Office 9070 Rancho Park Court Rancho Cucamonga, CA.91730 USA Phone: (909) 483-9900 Fax: (909) 944-0464 Page 3 of 16 AU9720 USB to Serial Bridge Controller V1.05W Official release_ Public Table of Contents 1 Introduction…………………………………………………………….. 1.1 Description…………………………………………………………………………….. 1.2 Features…………………………………………………………………………………. 2 Application Block Diagram…………………………………………. 3 Pin Assignment………………………………………………………… 6 6 6 7 8 4 System Architecture and Reference Design………………….. 10 4.1 AU9720 Block Diagram…………………………………………………………. 10 5 Electrical Characteristics…………………………………………… 11 5.1 Recommended Operating Conditions………………………………….. 5.3 DC Electrical Characteristics for 3.3 volts operation…………… 5.4 Crystal Oscillator Circuit Setup for Characterization…………… 11 11 12 5.2 General DC Characteristics…………………………………………………… 11 5.5 ESD Test Results……………………………………………………………………. 12 5.6 Latch-Up Test Results……………………………………………………………. 13 6 Mechanical Information……………………………………………… 15 Page 4 of 16 AU9720 USB to Serial Bridge Controller V1.05W Official release_ Public List of Figures 2.1 Block Diagram………………………………………………………………………………….. 3.1 Pin Assignment Diagram………………………………………………………………….. 7 8 4.1 AU9720 Block Diagram……………………………………………………………………… 10 5.1 Crystal Oscillator Circuit Setup for Characterization Diagram……….. 11 5.2 Latch-Up Test Results Diagram…………………………………………………… 13 6.1 Mechanical Information Diagram…………………………………………………….. 15 List of Tables 3.1 5.1 5.2 5.3 5.4 5.5 Pin Descriptions……………………………………………………………………………. 9 Recommended Operating Conditions………………………………………….. 11 General DC Characteristics………………………………………………………….. 11 DC Electrical Characteristics for 3.3 volts operation……………………… ESD Data………………………………………………………………………………… 11 12 Latch-Up Data Table……………………………………………………………………… 13 Page 5 of 16 AU9720 USB to Serial Bridge Controller V1.05W Official release_ Public 1.0. Introduction 1.1. Description The AU9720 operates as a bridge between one USB port and one standard RS232 Serial port. The two large on-chip buffers have been pre-configured to accommodate the data flow between two different buses. The USB bulk-type data is adopted for maximum data transfer, which could be up to 6M bits/sec. Automatic handshake is supported at the Serial port. With these, a much higher baud rate can be achieved compared to the system uses legacy UART controller. This device is also compliant with USB power management and remote wakeup scheme. Only minimum required power is consumed from the host during Suspend. By integrating all the function in a 28-SSOP package, this chip is suitable to be embedded inside a data cable. With such cables, users can connect between a PC host and any device with RS232 interface. 1.2. Features Support USB Specification v1.1 and USB CDC v1.1 Support the RS232 Serial interface Support automatic handshake mode Support automatic hardware flow control with CTS/RTS Support automatic software flow control with XON/XOFF Support Remote wake-up and power management 384/128 bytes buffer each for upstream and downstream data flow Support default ROM or external EEPROM for device configuration On chip USB transceiver Crystal oscillator running at 12MHz Support Windows 98/SE, ME, 2000, XP, Windows CE3.0, CE.NET, Linux, and Mac OS 28 Pins SSOP Lead-Free package Page 6 of 16 AU9720 USB to Serial Bridge Controller V1.05W Official release_ Public 2.0. Application Diagram The following diagram shows several typical applications using AU9720. By connecting the USB connector to a desktop or notebook PC through AU9720, which is implemented as a bus-powered, a programmable speed could be gained to transfer data between PC and mobile phones with much higher baud rate speed than what normal UART devices could offer. Moble Phones Printer Moble Phones Fax USB TO RS232 USB TO RS232 Video PDA Computer Computer Page 7 of 16 AU9720 USB to Serial Bridge Controller V1.05W Official release_ Public 3.0. Pin Assignment The AU9720 is packaged in 28pin SSOP Lead-Free. The following figure shows signal name for each pin and the table in the following page describes each pin in details. Figure 3.1 Pin Assignment Diagram TXD DTRB RTSB VDD_232 RXD RIB DSRB DCDB CTSB RESETB GP0 GP1 GP2 EE_DAT 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 GND_PLL VDD_PLL OSC2 OSC1 VCC2.5V VCC5V VCC3V DP DM GND (I/O) TESTB VDD GND EE_CLK Alcor Micro AU9720 28-PIN SSOP Page 8 of 16 AU9720 USB to Serial Bridge Controller V1.05W Official release_ Public Table 3.1 Pin Assignments Pin# 1 2 3 4 5 6 7 8 9 10 11 Pin Name TXD DTRB RTSB VDD_232 RXD RIB DSRB DCDB CTSB RESETB GP0 I/O O O O PWR I I I I I I I/O Description Data Output to serial port Low: Data Terminal Ready (serial port) Low: Request To Send; (serial port) VDD for RS-232 (Input) Data Input from serial port Low: Ring Indicator (Serial Port) Low: Data Set Ready (Serial port) Low: Data Carrier Detect (serial port) Low: Clear to send (serial port) System reset Reserved for System Output use High (connect with external 47K resistor) for USB Heavy Load (500mA); Low (connect with external 220K resistor) for USB Light Load (100mA) Shutdown Transceiver under Suspend mode External EEPROM data signal External EEPROM clock Ground Power input (3.3V) Reserved I/O Ground USB DMINUS signal USB DPLUS Signal 3.3v power output 5v power input 2.5v power output Crystal oscillator input Crystal oscillator output 3.3V input power for PLL Ground for PLL 12 GP1 I/O 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 GP2 EE_DAT EE_CLK GND VDD TESTB GND (I/O) DM DP VCC3V VCC5V VCC2.5V OSC1 OSC2 VDD_PLL GND_PLL I/O I/O I/O PWR PWR I PWR I/O I/O PWR PWR PWR I O PWR PWR Page 9 of 16 AU9720 USB to Serial Bridge Controller V1.05W Official release_ Public 4.0. System Architecture and Reference Design 4.1. Block Diagram Figure 4.1 AU9720 USB to Serial Bridge controller Block Diagram USB PORT PLL 8052 CPU I2C BUS EEPROM INTERFACE Memory Input Buffer Serial PORT UART Interface USB Transceiver Output Buffer USB to RS232 Bridge Core USBEngine Endpoint Endpoint0 Control Endpoint1 Control MemoryControl UsbProtocol ControlTr ansState InOutCon trol SERDES Crc PacketSta te UpPortSta tus USBCpuInterface Ripple Counter frametimer CpuInterface UsbPll USBXferControl Page 10 of 16 AU9720 USB to Serial Bridge Controller V1.05W Official release_ Public 5.0. Electrical Characteristics 5.1 Recommended Operating Conditions Table 5.1 Recommended Operating Conditions SYMBOL VCC VIN TOPR TSTG PARAMETER Power Supply Input Voltage Operating Temperature Storage Temperature MIN 4.75 0 0 -40 TYP 5 MAX 5.25 VCC 85 125 UNITS V V O C C O 5.2 General DC Characteristics Table 5.2 General DC Characteristics SYMBOL IIL IIH IOZ CIN COUT CBID PARAMETER Input low current Input high current Tri-state leakage current Input capacitance Output capacitance Bi-directional buffer capacitance CONDITIONS no pull-up or pull-down no pull-up or pull-down MIN -1 -1 -10 5 5 5 TYP MAX UNITS 1 1 10 µA µA µA ρF ρF ρF 5.3 DC Electrical Characteristics for 3.3 volts operation Table 5.3 DC Electrical Characteristics for 3.3 volts operation SYMBO VIL VIH VOL VOH RI PARAMETER Input Low Voltage CONDITIONS CMOS CMOS IOL=4mA, 16mA IOH=4mA,16mA Vil=0V or Vih=VCC 2.4 10K/200K 2.3 0.4 MIN TYP MAX 0.9 UNITS V V V V KΩ Input Hight Voltage Output low voltage Output high voltage Input Pull-up/down resistance Page 11 of 16 AU9720 USB to Serial Bridge Controller V1.05W Official release_ Public 5.4 Crystal Oscillator Circuit Setup for Characterization The following setup was used to measure the open loop voltage gain for crystal oscillator circuits. The feedback resistor serves to bias the circuit at its quiescent operating point and the AC coupling capacitor, Cs, is much larger than C1 and C2. Figure 5.1 Crystal Oscillator Circuit Setup for Characterization 5.5 ESD Test Results Test Description: ESD Testing was performed on a Zapmaster system using the Human-Body-Model (HBM) and Machine-Model (MM), according to MIL-STD 883 and EIAJ IC-121 respectively. Human-Body-Model stresses devices by sudden application of a high voltage supplied by a 100pF capacitor through 1.5k-ohm resistance. Machine-Model stresses devices by sudden application of a high voltage supplied by a 200pF capacitor through very low (0 ohm) resistance. Test circuit & condition Zap Interval: 1 second Number of Zaps: 3 positive and 3 negative at room temperature Criteria: I-V Curve Tracing Table 5.4 ESD Data Model HBM MM Mode Vdd, Vss, I/C Vdd, Vss, I/C S/S 15 15 Target 6000V 200V Results PASS PASS Page 12 of 16 AU9720 USB to Serial Bridge Controller V1.05W Official release_ Public 5.6 Latch-Up Test Results Test Description: Latch-Up testing was performed at room ambience using an IMCS-4600 system which applies a stepped voltage to one pin per device with all other pins open except Vdd and Vss, to which 5Volts and ground were biased respectively. Testing was started at 5.0V (Positive) or 0V (Negative), and the DUT was biased for 0.5 seconds. If neither the PUT current supply nor the device current supply reached the predefined limit (DUT=00mA, Icc=100mA), then the voltage was increased by 0.1Volts and the pin was tested again. This procedure was recommended by the JEDEC JC-40.2 CMOS Logic standardization committee. Notes: 1. DUT: The device under test. 2. PUT: The pin under test. Figure 5.2 Latch-Up Test Results Test Circuit: Positive Input/Output Overvoltage/Overcurrent Page 13 of 16 AU9720 USB to Serial Bridge Controller V1.05W Official release_ Public Test Circuit: Negative Input/Output Overvoltage/Overcurrent Supply Overvoltage Test Table 5.5 Latch–Up Data Mode + + Current Vdd - Vxx Voltage Voltage (V)/Current (mA) 11.0 11.0 200 200 9.0 S/S 5 5 5 5 5 Results Pass Pass Pass Pass Pass Page 14 of 16 AU9720 USB to Serial Bridge Controller V1.05W Official release_ Public 6.0 Mechanical Information Figure 6.1 Mechanical Information Diagram Top View AU9720 USB to Serial Bridge Controller V1.05W Official release_ Public Side View End View Pin 1 Pin 28 Page 15 of 16 【MEMO】 About Alcor Micro, Corp Alcor Micro, Corp. designs, develops and markets highly integrated and advanced peripheral semiconductor, and software driver solutions for the personal computer and consumer electronics markets worldwide. We specialize in USB solutions and focus on emerging technology such as USB and IEEE 1394. The company offers a range of semiconductors including controllers for USB hub, integrated keyboard/USB hub and USB Flash memory card reader…etc. Alcor Micro, Corp. is based in Taipei, Taiwan, with sales offices in Taipei, Japan, Korea and California. Alcor Micro is distinguished by its ability to provide innovative solutions for spec-driven products. Innovations like single chip solutions for traditional multiple chip products and on-board voltage regulators enable the company to provide cost-efficiency solutions for the computer peripheral device OEM customers worldwide. Page 16 of 16 AU9720 USB to Serial Bridge Controller V1.05W Official release_ Public