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

SMSC USB2640, USB2640i 7.3.3.28EFh: Boost_Up, 7.3.3.29F0h: Boost_3:0

1 60

Download 60 pages, 1.11 Mb

Ultra Fast USB 2.0 Multi-Format Flash Media Controller/USB Hub Combo

7.3.3.28EFh: Boost_Up

BIT
NUMBER	BIT NAME	DESCRIPTION

7:2	Reserved	Reserved

1:0	BOOST_IOUT	USB electrical signaling drive strength Boost Bit for the Upstream Port ‘A’.
		‘00’ = Normal electrical drive strength = No boost
		‘01’ = Elevated electrical drive strength = Low (approximately 4% boost)
		‘10’ = Elevated electrical drive strength = Medium (approximately 8% boost)
		‘11’ = Elevated electrical drive strength = High (approximately 12% boost)
		Note: “Boost” could result in non-USB Compliant parameters (one
		example would be Test J/K levels), OEM should use a ‘00’ value
		unless specific implementation issues require additional signal
		boosting to correct for degraded USB signalling levels.

7.3.3.29F0h: Boost_3:0

BIT
NUMBER	BIT NAME	DESCRIPTION

7:6	Reserved	Always reads ‘0’.

5:4	BOOST_IOUT_3	Upstream USB electrical signaling drive strength Boost Bit for Downstream
		Port ‘3’.
		‘00’ = Normal electrical drive strength = No boost
		‘01’ = Elevated electrical drive strength = Low (approximately 4% boost)
		‘10’ = Elevated electrical drive strength = Medium (approximately 8% boost)
		‘11’ = Elevated electrical drive strength = High (approximately 12% boost)

3:2	BOOST_IOUT_2	Upstream USB electrical signaling drive strength Boost Bit for Downstream
		Port ‘2’.
		‘00’ = Normal electrical drive strength = No boost
		‘01’ = Elevated electrical drive strength = Low (approximately 4% boost)
		‘10’ = Elevated electrical drive strength = Medium (approximately 8% boost)
		‘11’ = Elevated electrical drive strength = High (approximately 12% boost)
		Note: “Boost” could result in non-USB Compliant parameters (one
		example would be Test J/K levels), OEM should use a ‘00’ value
		unless specific implementation issues require additional signal
		boosting to correct for degraded USB signalling levels.

1:0	Reserved	Always reads ‘0’.

SMSC USB2640/USB2641	43	Revision 2.0 (10-03-08)
	DATASHEET

Contents

USB2640/USB2641 Ultra Fast USB 2.0 Multi-Format Flash Media Controller/USB Hub Combo Datasheet Page Table of Contents Page List of Tables List of Figures Chapter 1 Overview 1.1Device Features 1.2OEM Selectable Features Chapter 2 Acronyms Chapter 3 Pin Configurations Figure 3.2 USB2641 48-PinQFN Chapter 4 Pin Tables 4.148-PinTables Table 4.2 USB2641 48-PinTable SECURE DIGITAL / MEMORY STICKINTERFACE (14 PINS) DIGITAL POWER, NO CONNECTS (9 PINS) Diagrams Block 5 Chapter Page Chapter 6 Pin Descriptions 6.1USB2640/USB2641 Pin Descriptions Table 6.1 USB2640/USB2641 Pin Descriptions (continued) MEMORY STICK INTERFACE SECURE DIGITAL / MULTIMEDIACARD INTERFACE USB INTERFACE Note: SPI INTERFACE Page MISC DIGITAL / POWER / GROUND 6.2Buffer Type Descriptions 6.3Port Power Control USB2640 USB2641 6.4ROM BOOT Sequence Chapter 7 Configuration Options 7.1Hub 7.1.1.1Power Switching Polarity 7.2Card Reader 7.3System Configurations 7.3.2EEPROM Data Descriptor Table Internal Flash Media Controller Configurations REG ADDR REGISTER NAME Table 7.1 Internal Flash Media Controller Configurations (continued) Table 7.2 Hub Controller Configurations 7.3.2.10h-19h:USB Serial Number Option 7.3.2.21Ah-1Bh:USB Vendor ID Option 7.3.2.31Ch-1Dh:USB Product ID Option 7.3.2.41Eh-21h:USB Language Identifier Option 7.3.2.522h-5Dh:USB Manufacturer String Length 7.3.2.65Eh-99h:USB Product String Length 7.3.2.79Ah: USB BmAttribute (1 byte) 7.3.2.89Bh: USB MaxPower (1 byte) 7.3.2.99Ch-9Fh:Attribute Byte Descriptions 7.3.2.10A4h-A5h:LUN Power Configuration 7.3.2.11A8h: LED Blink Interval (1 byte) 7.3.2.12A9h: Blink Duration (1 byte) 7.3.3.1AAh-B0h:Lun 0 Identifier String 7.3.3.2B1h-B7h:Lun 1 Identifier String 7.3.3.3B8h-BEh:Lun 2 Identifier String 7.3.3.4BFh-C5h:Lun 3 Identifier String 7.3.3.5C6h-CDh:Inquiry Vendor String 7.3.3.6CEh-D2h:Inquiry Product String 7.3.3.7D3h: Dynamic Number of Luns 7.3.3.8D4h-D7h:Lun to Device Mapping 7.3.3.9D8h-DAh:Reserved 7.3.3.10DBh-DDh:Reserved 7.3.3.11DEh: Vendor ID (LSB) 7.3.3.12DFh: Vendor ID (MSB) 7.3.3.13E0h: Product ID (LSB) 7.3.3.14E1h: Product ID (MSB) 7.3.3.15E2h: Device ID (LSB) 7.3.3.16E3h: Device ID (MSB) 7.3.3.17E4h: Config Data Byte 1 (CFG_DAT_BYT1) 7.3.3.18E5h: Config Data Byte 2 (CFG_DAT_BYT2) 7.3.3.19E6h: Config Data Byte 3 (CFG_DAT_BYT3) 7.3.3.20E7h: Non-RemovableDevice 7.3.3.21E8h: Port Disable For Self-PoweredOperation 7.3.3.22E9h: Port Disable For Bus-PoweredOperation 7.3.3.23EAh: Max Power For Self-PoweredOperation 7.3.3.24EBh: Max Power For Bus-PoweredOperation 7.3.3.25ECh: Hub Controller Max Current For Self-PoweredOperation 7.3.3.26EDh: Hub Controller Max Current For Bus-PoweredOperation 7.3.3.27EEh: Power-OnTime 7.3.3.28EFh: Boost_Up 7.3.3.29F0h: Boost_3:0 7.3.3.30F1h: Port Swap 7.3.3.31F2h: Port Remap 7.3.3.32F3h: Port Remap 7.3.3.33F4h: MS/SD Clock Limit 7.3.3.34F5h: Reserved 7.3.3.35F6h: Reserved FCh-FFh: 7.3.4.1Implementation Characteristics 7.4Default Configuration Option: 7.5Reset 7.5.2.1RESET_N for EEPROM Configuration Chapter 8 Pin Reset States 8.1Pin Reset States Table 8.2 USB2640 Pin Reset States (continued) Table 8.3 USB2641 Pin Reset States Table 8.3 USB2641 Pin Reset States (continued) Chapter 9 DC Parameters 9.1Maximum Guaranteed Ratings 9.2Operating Conditions 9.3DC Electrical Characteristics Input Leakage O12 Type Buffer I/O12, I/O12PU & I/O12PD Type Buffer IO-U 9.4Capacitance Chapter 10 AC Specifications 10.1Oscillator/Clock (C1 + CS1) x (C2 + CS2) CL (C1 + CS1 + C2 + CS2) Chapter 11 Package Outline Chapter 12 GPIO Usage