SMSC USB2503, USB2503A Chapter 6 XNOR Test

Integrated USB 2.0 Compatible 3-Port Hub

Datasheet

Chapter 6 XNOR Test

XNOR continuity tests all signal pins on the Hub (every pin except for NC, XTAL1/CLKIN, XTAL2, ATEST/REG_EN, RBIAS, TEST1, Power, and Ground). This functionality is enabled by driving TEST1 and CFG_SEL[1] high, driving SCLK low and transition RESET_N from low to high. The output from the XNOR chain is driven to GR2 . For each pin tested for continuity GR2 should toggle.

SMSC USB2503/USB2503A	37	Revision 2.3 (08-27-07)
	DATASHEET

Contents

USB2503 USB2503A Integrated USB Compatible 3-PortHub PRODUCT FEATURES ORDER NUMBERS: Table of Contents Chapter List of Figures List of Tables Chapter 1 General Description 1.1OEM Selectable Features Chapter 2 Pin Table 3-Port Chapter 3 Pin Configuration 3-PortHub Chapter 4 3-PortHub Block Diagram Page Page Page Page Chapter 5 Functional Block Description 5.13-PortHub 5.1.1Hub Configuration Options 5.1.1.5Port Indicators 5.1.1.6High-SpeedDisable 5.1.1.7Multiple-TTSupport 5.1.1.8EOP Disable 5.1.1.9Current Sensing 5.1.1.13Self-PoweredPort DISABLE 5.1.1.14Bus-PoweredPort DISABLE 5.1.1.15Dynamic Power 5.1.1.16Over-CurrentTimer 5.1.1.17Self-PoweredMax Power 5.2EEPROM Interface 5.2.1I2C EEPROM 5.2.2In-CircuitEEPROM Programming 5.2.3EEPROM DATA EEPROM Offset 1:0(h) - Vendor ID 5.2.3.2EEPROM Offset 3:2(h) - Product ID 5.2.3.3EEPROM Offset 5:4(h) - Device ID 5.2.3.4EEPROM Offset 6(h) - CONFIG_BYTE_1 5.2.3.5EEPROM Offset 7(h) - CONFIG_BYTE_2 EEPROM Offset 8(h) - Non-RemovableDevice 5.2.3.7EEPROM Offset 9(h) - Port Disable For Self Powered Operation 5.2.3.8EEPROM Offset A(h) - Port Disable For Bus Powered Operation 5.2.3.9EEPROM Offset B(h) - Max Power For Self Powered Operation 5.2.3.10EEPROM Offset C(h) - Max Power For Bus Powered Operation EEPROM Offset D(h) - Hub Controller Max Current For Self Powered Operation 5.3SMBus Slave Interface 5.3.1Bus Protocols 5.3.2Invalid Protocol Response Behavior 5.3.3General Call Address Response 5.3.4Slave Device Time-Out 5.3.5Stretching the SCLK Signal 5.3.6SMBus Timing 5.3.7Bus Reset Sequence 5.3.8SMBus Alert Response Address 5.3.9.1Register 00h: Status/Command (Reset = 0x00) 5.3.9.2Register 01h: Vendor ID (LSB) (Reset = 0x00) Register 02h: Vendor ID (MSB) (Reset = 0x00) Register 03h: Product ID (LSB) (Reset = 0x00) Register 04h: Product ID (MSB) (Reset = 0x00) Register 05h: Device ID (LSB) (Reset = 0x00) Register 06h: Device ID (MSB) (Reset = 0x00) 5.3.9.9Register 08h: Configuration Data Byte 2 (Reset = 0x00) Register 09h: Non-RemovableDevice (Reset = 0x00) 5.3.9.11Register 0Ah: Port Disable For Self Powered Operation (Reset = 0x00) 5.3.9.12Register 0Bh: Port Disable For Bus Powered Operation (Reset = 0x00) 5.3.9.13Register 0Ch: Max Power For Self Powered Operation (Reset = 0x00) 5.3.9.14Register 0Dh: Max Power For Bus Powered Operation (Reset = 0x00) 5.4Default Configuration Option: 5.5Default Strapping Options: 5.6Reset 5.6.1External Hardware RESET_N 5.6.1.1RESET_N for Strapping Option Configuration 5.6.1.2RESET_N for EEPROM Configuration 5.6.1.3RESET_N for SMBus Slave Configuration 5.6.2USB Bus Reset Page Chapter 6 XNOR Test Chapter 7 DC Parameters 7.1Maximum Guaranteed Ratings 7.2Recommended Operating Conditions Page Page Chapter 8 AC Specifications 8.1Oscillator/Clock 8.1.1SMBus Interface: 8.1.2I2C EEPROM: 8.1.3USB Chapter 9 Package Outline