Manuals / Brands / Computer Equipment / Switch / SMSC / Computer Equipment / Switch

SMSC USB2512A 4.2.1.13Register 0Ch: Max Power For Self Powered Operation, 4.2.1.14Register 0Dh: Max Power For Bus Powered Operation

1 37

Download 37 pages, 597.89 Kb

USB 2.0 Hi-Speed 2-Port Hub Controller

Datasheet

4.2.1.13Register 0Ch: Max Power For Self Powered Operation

BIT
NUMBER	BIT NAME	DESCRIPTION

7:0	MAX_PWR_SP	Max Power Self_Powered: Value in 2mA increments that the Hub consumes
		from an upstream port (VBUS) when operating as a self-powered hub. This
		value includes the hub silicon along with the combined power consumption
		(from VBUS) of all associated circuitry on the board. This value also includes
		the power consumption of a permanently attached peripheral if the hub is
		configured as a compound device, and the embedded peripheral reports
		0mA in its descriptors.
		Note: The USB 2.0 Specification does not permit this value to exceed
		100mA

4.2.1.14Register 0Dh: Max Power For Bus Powered Operation

BIT
NUMBER	BIT NAME	DESCRIPTION

7:0	MAX_PWR_BP	Max Power Bus_Powered: Value in 2mA increments that the Hub consumes
		from an upstream port (VBUS) when operating as a bus-powered hub. This
		value includes the hub silicon along with the combined power consumption
		(from VBUS) of all associated circuitry on the board. This value also includes
		the power consumption of a permanently attached peripheral if the hub is
		configured as a compound device, and the embedded peripheral reports
		0mA in its descriptors.

4.2.1.15Register 0Eh: Hub Controller Max Current For Self Powered Operation

BIT
NUMBER	BIT NAME	DESCRIPTION

7:0	HC_MAX_C_SP	Hub Controller Max Current Self-Powered: Value in 2mA increments that the
		Hub consumes from an upstream port (VBUS) when operating as a self-
		powered hub. This value includes the hub silicon along with the combined
		power consumption (from VBUS) of all associated circuitry on the board.
		This value does NOT include the power consumption of a permanently
		attached peripheral if the hub is configured as a compound device.
		Note: The USB 2.0 Specification does not permit this value to exceed
		100mA
		A value of 50 (decimal) indicates 100mA, which is the default value.

Revision 1.96 (07-11-08)	20	SMSC USB2512A
	DATASHEET

Contents

USB2512A USB 2.0 Hi-Speed 2-Port Hub Controller PRODUCT FEATURES General Description ORDER NUMBERS: USB2512A-AEZGFOR 36 PIN, QFN LEAD-FREEROHS COMPLIANT PACKAGE Table of Contents Chapter List of Figures List of Tables Chapter 1 Pin Configuration Chapter 2 Block Diagram Chapter 3 Pin Descriptions 3.1PIN Descriptions Table 3.1 USB2512A Pin Descriptions (continued) SERIAL PORT INTERFACE MISC Note: Table 3.2 SMBus or EEPROM Interface Behavior CFG_SEL1 CFG_SEL0 SMBUS OR EEPROM INTERFACE BEHAVIOR Table 3.3 USB2512A Power, Ground, and No Connect 3.2Buffer Type Descriptions Chapter 4 Configuration Options 4.12-PortHub 4.1.1Hub Configuration Options 4.1.1.1Power Switching Polarity 4.1.2VBus Detect 4.2.1.1Register 00h: Vendor ID (LSB) 4.2.1.2Register 01h: Vendor ID (MSB) 4.2.1.3Register 02h: Product ID (LSB) 4.2.1.4Register 03h: Product ID (MSB) 4.2.1.5Register 04h: Device ID (LSB) 4.2.1.6Register 05h: Device ID (MSB) 4.2.1.7Register 06h: CONFIG_BYTE_1 4.2.1.8Register 07h: Configuration Data Byte 4.2.1.9Register 08h: Configuration Data Byte 4.2.1.10Register 09h: Non-RemovableDevice Register 0Ah: Port Disable For Self Powered Operation 4.2.1.12Register 0Bh: Port Disable For Bus Powered Operation 4.2.1.13Register 0Ch: Max Power For Self Powered Operation 4.2.1.14Register 0Dh: Max Power For Bus Powered Operation 4.2.1.15Register 0Eh: Hub Controller Max Current For Self Powered Operation 4.2.1.16Register 0Fh: Hub Controller Max Current For Bus Powered Operation 4.2.1.17Register 10h: Power-OnTime 4.2.1.18Register F6h: Boost_Up 4.2.1.19Register F8h: Boost_2:0 4.2.1.20Register FAh: Port Swap Register FBh: Port Remap 4.2.1.22Register FFh: Status/Command 4.2.2 I2C EEPROM 4.2.2.1Implementation Characteristics 4.2.2.2Pull-UpResistor 4.2.2.3I2C EEPROM Slave Address 4.2.3In-CircuitEEPROM Programming 4.3SMBus Slave Interface 4.3.1Bus Protocols 4.3.1.1Block Read/Write 4.3.2Invalid Protocol Response Behavior 4.3.3General Call Address Response 4.3.4Slave Device Time-Out 4.3.5Stretching the SCLK Signal 4.3.6SMBus Timing 4.4Default Configuration Option: 4.5Default Strapping Options: 4.6Reset 4.6.1Internal POR Hardware Reset 4.6.2External Hardware RESET_N 4.6.2.1RESET_N for Strapping Option Configuration 4.6.2.2RESET_N for EEPROM Configuration 4.6.2.3RESET_N for SMBus Slave Configuration 4.6.3USB Bus Reset Page Chapter 5 DC Parameters 5.1Maximum Guaranteed Ratings 5.2Operating Conditions Table 5.1 DC Electrical Characteristics (continued) ICLK Input Buffer O12, I/O12 &I/OSD12 Type Buffer IO-U 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 RevisionChapter 7 Package Outline