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SMSC USB2513i 4.7Reset, 4.7.1Internal POR Hardware Reset, 4.7.2External Hardware RESET_N, Figure 4.3 LED Strapping Option

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Industrial Temperature Rated USB 2.0 High-Speed 3-Port Hub Controller

Datasheet

+V

Strap High

	100K
LED	LED
Pin

HUB

LED
Pin	Strap Low
	100K
	LED

Figure 4.3 LED Strapping Option

4.7Reset

There are two different resets that the Hub experiences. One is a hardware reset (either from the internal POR reset circuit or via the RESET_N pin) and the second is a USB Bus Reset.

4.7.1Internal POR Hardware Reset

All reset timing parameters are guaranteed by design.

4.7.2External Hardware RESET_N

A valid hardware reset is defined as assertion of RESET_N for a minimum of 1us after all power supplies are within operating range. While reset is asserted, the Hub (and its associated external circuitry) consumes less than 500μA of current from the upstream USB power source.

Assertion of RESET_N (external pin) causes the following:

1.All downstream ports are disabled, and PRTPWR power to downstream devices is removed.

2.The PHYs are disabled, and the differential pairs will be in a high-impedance state.

3.All transactions immediately terminate; no states are saved.

4.All internal registers return to the default state (in most cases, 00(h)).

5.The external crystal oscillator is halted.

6.The PLL is halted.

7.LED indicators are disabled.

The Hub is “operational” 500μs after RESET_N is negated.

Once operational, the Hub immediately reads OEM-specific data from the external EEPROM (if the SMBus option is not disabled).

SMSC USB2513i	37	Revision 1.98 (11-19-07)
	DATASHEET

Contents

USB2513i Industrial Temperature Rated USB 2.0 High-Speed 3-PortHub Controller PRODUCT FEATURES ORDER NUMBERS: Table of Contents Chapter List of Figures List of Tables Chapter 1 Pin Configuration Figure 1.2 USB2513i 48-PinQFN Chapter 2 Block Diagram Chapter 3 Pin Descriptions 3.1PIN Descriptions Table 3.1 USB2514 Pin Descriptions (continued) Note: SERIAL PORT INTERFACE MISC Page Table 3.2 SMBus or EEPROM Interface Behavior CFG_SEL2 CFG_SEL1 CFG_SEL0 SMBUS OR EEPROM INTERFACE BEHAVIOR 3.2Buffer Type Descriptions Table 3.4 USB2514 Buffer Type Descriptions (continued) Chapter 4 Configuration Options 4.13-PortHub 4.1.1Hub Configuration Options 4.1.1.1Power Switching Polarity 4.1.2VBus Detect 4.3EEPROM Interface 4.3.1Internal Register Set (Common to EEPROM and SMBus) 4.3.1.1Register 00h: Vendor ID (LSB) 4.3.1.2Register 01h: Vendor ID (MSB) Register 02h: Product ID (LSB) 4.3.1.4Register 03h: Product ID (MSB) 4.3.1.5Register 04h: Device ID (LSB) 4.3.1.6Register 05h: Device ID (MSB) 4.3.1.7Register 06h: CONFIG_BYTE_1 4.3.1.8Register 07h: Configuration Data Byte 4.3.1.9Register 08h: Configuration Data Byte 4.3.1.10Register 09h: Non-RemovableDevice Register 0Ah: Port Disable For Self Powered Operation 4.3.1.12Register 0Bh: Port Disable For Bus Powered Operation 4.3.1.13Register 0Ch: Max Power For Self Powered Operation 4.3.1.14Register 0Dh: Max Power For Bus Powered Operation 4.3.1.15Register 0Eh: Hub Controller Max Current For Self Powered Operation 4.3.1.16Register 0Fh: Hub Controller Max Current For Bus Powered Operation 4.3.1.17Register 10h: Power-OnTime 4.3.1.18Register 11h: Language ID High 4.3.1.19Register 12h: Language ID Low 4.3.1.20Register 13h: Manufacturer String Length 4.3.1.21Register 14h: Product String Length 4.3.1.22Register 15h: Serial String Length 4.3.1.23Register 16h-53h:Manufacturer String 4.3.1.24Register 54h-91h:Product String Register 92h-CFh:Serial String 4.3.1.26Register F6h: Boost_Up 4.3.1.27Register F8h: Boost_3:0 4.3.1.28Register FAh: Port Swap Register FBh: Port Remap Register FCh: Port Remap Register FFh: Status/Command 4.3.2 I2C EEPROM 4.3.2.1Implementation Characteristics 4.3.2.2Pull-UpResistor 4.3.2.3I2C EEPROM Slave Address 4.3.3In-CircuitEEPROM Programming 4.4SMBus Slave Interface 4.4.1Bus Protocols 4.4.1.1Block Read/Write Slave Address Register Address 4.4.2Invalid Protocol Response Behavior 4.4.3General Call Address Response 4.4.4Slave Device Time-Out 4.4.5Stretching the SCLK Signal 4.4.6SMBus Timing 4.5Default Configuration Option: 4.6Default Strapping Options: 4.7Reset 4.7.1Internal POR Hardware Reset 4.7.2External Hardware RESET_N 4.7.2.1RESET_N for Strapping Option Configuration 4.7.2.2RESET_N for EEPROM Configuration 4.7.2.3RESET_N for SMBus Slave Configuration 4.7.3USB Bus Reset Page Chapter 5 DC Parameters 5.1Maximum Guaranteed Ratings 5.2Recommended Operating Conditions Table DC Electrical Characteristics I, IS Type Input Buffer Input Buffer with Pull-Up (IPU) Table 5.1 DC Electrical Characteristics (continued) IO-U Note CAPACITANCE TA = 25°C; fc = 1MHz; VDD18, VDDPLL Chapter 6 AC Specifications 6.1Oscillator/Clock 6.1.1SMBus Interface: 6.1.2I2C EEPROM: 6.1.3USB Chapter 7 Package Outlines Figure 7.2 48-PinQFN, 7x7mm Body, 0.5mm Pitch