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SMSC USB2514 4.7.2.1RESET_N for Strapping Option Configuration, MIN, TYP, MAX, NAME, UNITS, Notes:, DESCRIPTION, Table 4.5 Reset_N Timing for Default/Strap Option Mode

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USB 2.0 High-Speed 4-Port Hub Controller

Datasheet

4.7.2.1RESET_N for Strapping Option Configuration

	Hardware		Drive Strap	Attach			Start
		Read Strap	Outputs to		USB Reset		completion
	reset			USB		Idle
		Options	inactive		recovery		request
	asserted			Upstream
			levels				response

t1

t5

t6

t7

t8

t2

RESET_N

t3

VSS

t4

Strap Pins

Don’t Care

Valid

Driven by Hub if strap is an output.

VSS

Don’t Care

Figure 4.4 Reset_N Timing for Default/Strap Option Mode

Table 4.5 Reset_N Timing for Default/Strap Option Mode

NAME

DESCRIPTION

MIN

TYP

MAX

UNITS

t1

RESET_N Asserted.

1

μsec

t2

Strap Setup Time

16.7

nsec

t3

Strap Hold Time.

16.7

1400

nsec

t4

hub outputs driven to inactive logic states

1.5

2

μsec

t5

USB Attach (See Note).

100

msec

t6

Host acknowledges attach and signals USB

100

msec

Reset.

t7

USB Idle.

undefined

msec

t8

Completion time for requests (with or without data

5

msec

stage).

Notes:

When in Bus-Powered mode, the Hub and its associated circuitry must not consume more than 100mA from the upstream USB power source during t1+t5.

All Power Supplies must have reached the operating levels mandated in Chapter 5, DC Parameters, prior to (or coincident with) the assertion of RESET_N.

SMSC USB2514	39	Revision 1.98 (11-19-07)
	DATASHEET

Contents

USB2514 USB 2.0 High-Speed 4-Port Hub Controller PRODUCT FEATURES General Description ORDER NUMBERS: Table of Contents Chapter List of Figures List of Tables Chapter 1 Pin Configuration Figure 1.2 USB2514 48-PinQFN Chapter 2 Block Diagram PLL Bus-Power Upstream Detect/VBUS 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 4.14-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 4.3.1.11Register 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_4:0 Register FAh: Port Swap 4.3.1.29Register FBh: Port Remap 4.3.1.30Register FCh: Port Remap Table 4.4 Port Remap Register for Ports 3 & 4.3.1.31Register 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