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USB2512A
USB 2.0 Hi-Speed 2-Port
Hub Controller
Datasheet
PRODUCT FEATURES
Select the presence of a permanently hardwired USB
General Description
peripheral device on a port by port basis
The SMSC 2-Port Hub is a low power, OEM
Configure the delay time for filtering the over-current
configurable, STT (Single transaction translator) hub
sense inputs
controller IC with 2 downstream ports for embedded
Configure the delay time for turning on downstream
USB solutions. The 2-port hub is fully
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USB 2.0 Hi-Speed 2-Port Hub Controller Datasheet ORDER NUMBERS: USB2512A-AEZG FOR 36 PIN, QFN LEAD-FREE ROHS COMPLIANT PACKAGE 80 ARKAY DRIVE, HAUPPAUGE, NY 11788 (631) 435-6000, FAX (631) 273-3123 Copyright © 2008 SMSC or its subsidiaries. All rights reserved. Circuit diagrams and other information relating to SMSC products are included as a means of illustrating typical applications. Consequently, complete information sufficient for construction purposes is not necessarily given. Although the
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USB 2.0 Hi-Speed 2-Port Hub Controller Datasheet Table of Contents Chapter 1 Pin Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Chapter 2 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Chapter 3 Pin Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 3.1 PIN Descriptions . . . . . . . . .
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USB 2.0 Hi-Speed 2-Port Hub Controller Datasheet List of Figures Figure 1.1 USB2512A 36-Pin QFN (Embedded Footprint) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Figure 2.1 USB2512A Block Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Figure 4.1 Block Write. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Figure 4.2 Block Re
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USB 2.0 Hi-Speed 2-Port Hub Controller Datasheet List of Tables Table 3.1 USB2512A Pin Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Table 3.2 SMBus or EEPROM Interface Behavior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Table 3.3 USB2512A Power, Ground, and No Connect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Table 3.4 USB2512A Buffer Type Descripti
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USB 2.0 Hi-Speed 2-Port Hub Controller Datasheet Chapter 1 Pin Configuration SUSP_IND/LOCAL_PWR/NON_REM0 NC 28 18 VDDA33 29 17 OCS2_N USBUP_DM 30 16 PRTPWR2 SMSC USBUP_DP 31 15 VDD33CR USB2512A XTAL2 32 14 VDD18 Embedded Footprint XTAL1/CLKIN 33 13 OCS1_N (Top View QFN-36) VDD18PLL PRTPWR1 34 12 Thermal Slug RBIAS TEST 35 11 (must be connected to VSS) VDD33PLL 36 10 VDDA33 Indicates pins on the bottom of the device. Figure 1.1 USB2512A 36-Pin QFN (Embedded Footprint) Revision 1.96 (07-11-08) 6 S
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USB 2.0 Hi-Speed 2-Port Hub Controller Datasheet Chapter 2 Block Diagram To Upstream Upstream USB To EEPROM or 24 MHz Crystal V Data SMBus Master BUS SD SCK 3.3V 1.8V PLL Serial Bus-Power Interface Upstream Detect/V BUS 1.8V Reg PHY Pulse SIE Controller Repeater Port TT Controller Routing & Port Re-Ordering Logic Port #1 Port #2 OC OC Sense Sense PHY#1 PHY#2 Switch Switch Driver Driver LED LED Drivers Drivers OC Sense OC Sense USB Data USB Data Switch/LED Switch/LED Downstream Downstream
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USB 2.0 Hi-Speed 2-Port Hub Controller Datasheet Chapter 3 Pin Descriptions 3.1 PIN Descriptions This section provides a detailed description of each signal. The signals are arranged in functional groups according to their associated interface. The “N” symbol in the signal name indicates that the active, or asserted, state occurs when the signal is at a low voltage level. When “N” is not present before the signal name, the signal is asserted when at the high voltage level. The terms assertion a
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USB 2.0 Hi-Speed 2-Port Hub Controller Datasheet Table 3.1 USB2512A Pin Descriptions (continued) QFN-36 BUFFER TYPE DESCRIPTION SYMBOL EMB RBIAS 35 I-R USB Transceiver Bias A 12.0kΩ (+/- 1%) resistor is attached from ground to this pin to set the transceiver’s internal bias settings. SERIAL PORT INTERFACE SDA/ 22 I/OSD12 Serial Data / SMB Data & Port Non-removable Strap Option SMBDATA/ NON_REM1: Non-removable port strap NON_REM1 option. If this strap is enabled by package and configuration s
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USB 2.0 Hi-Speed 2-Port Hub Controller Datasheet Table 3.1 USB2512A Pin Descriptions (continued) QFN-36 BUFFER SYMBOL EMB TYPE DESCRIPTION XTAL2 32 OCLKx Crystal Output 24MHz Crystal This is the other terminal of the crystal, or a NO CONNECT when an external clock source is used to drive XTAL1/CLKIN. Note: This output must not be used to drive any external circuitry other than the crystal circuit. RESET_N 26 IS RESET Input The system can reset the chip by driving this input low. The minim
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USB 2.0 Hi-Speed 2-Port Hub Controller Datasheet Table 3.2 SMBus or EEPROM Interface Behavior CFG_SEL1 CFG_SEL0 SMBUS OR EEPROM INTERFACE BEHAVIOR 0 0 Internal Default Configuration Strap Options Enabled 0 1 Configured as an SMBus slave for external download of user-defined descriptors. SMBus slave address 58 (0101100x) Strap Options Disabled All Settings Controlled by Registers 1 0 Internal Default Configuration Strap Options Enabled Bus Power Operation 2 11 2-Wire I C EEPROMS are sup
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USB 2.0 Hi-Speed 2-Port Hub Controller Datasheet 3.2 Buffer Type Descriptions Table 3.4 USB2512A Buffer Type Descriptions BUFFER DESCRIPTION I Input. IPD Input with internal weak pull-down resistor. IPU Input with internal weak pull-up resistor. IS Input with Schmitt trigger. O12 Output 12mA. OD12 Open drain with 12mA sink. I/O12 Input/Output buffer with 12mA sink and 12mA source. I/OSD12 2 Open drain with Schmitt trigger and 12mA sink. Must meet I C-Bus Specification Version 2.1 requirements.
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USB 2.0 Hi-Speed 2-Port Hub Controller Datasheet Chapter 4 Configuration Options 4.1 2-Port Hub SMSC’s USB 2.0 2-Port Hub is fully specification compliant to the Universal Serial Bus Specification Revision 2.0 April 27,2000 (12/7/2000 and 5/28/2002 Errata). Please reference Chapter 10 (Hub Specification) for general details regarding Hub operation and functionality. The 2-Port Hub provides 1 Transaction Translator (TT) that is shared by both downstream ports (defined as Single-TT configuration
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USB 2.0 Hi-Speed 2-Port Hub Controller Datasheet Table 4.1 Internal Default, EEPROM and SMBus Register Memory Map (continued) SMBUS AND REG INTERNAL EEPROM OR ADDR R/W REGISTER NAME ABBR DEFAULT ROM VALUES 03h R/W PID MSB PIDM 25h 0x00 04h R/W DID LSB DIDL A0h 0x00 05h R/W DID MSB DIDM 0Ah 0x00 06h R/W Config Data Byte 1 CFG1 8Bh 0x00 07h R/W Config Data Byte 2 CFG2 10h 0x00 08h R/W Config Data Byte 3 CFG3 00h 0x00 09h R/W Non-Removable Devices NRD 00h 0x00 0Ah R/W Port Disable (Self) PDS 00
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USB 2.0 Hi-Speed 2-Port Hub Controller Datasheet 4.2.1.2 Register 01h: Vendor ID (MSB) BIT NUMBER BIT NAME DESCRIPTION 7:0 VID_MSB Most Significant Byte of the Vendor ID. This is a 16-bit value that uniquely identifies the Vendor of the user device (assigned by USB-Interface Forum). This field is set by the OEM using either the SMBus or EEPROM interface options. 4.2.1.3 Register 02h: Product ID (LSB) BIT NUMBER BIT NAME DESCRIPTION 7:0 PID_LSB Least Significant Byte of the Product ID. This
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USB 2.0 Hi-Speed 2-Port Hub Controller Datasheet 4.2.1.7 Register 06h: CONFIG_BYTE_1 BIT NUMBER BIT NAME DESCRIPTION 7 SELF_BUS_PWR Self or Bus Power: Selects between Self- and Bus-Powered operation. The Hub is either Self-Powered (draws less than 2mA of upstream bus power) or Bus-Powered (limited to a 100mA maximum of upstream power prior to being configured by the host controller). When configured as a Bus-Powered device, the SMSC Hub consumes less than 100mA of current prior to being con
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USB 2.0 Hi-Speed 2-Port Hub Controller Datasheet BIT NUMBER BIT NAME DESCRIPTION 0 PORT_PWR Port Power Switching: Enables power switching on all ports simultaneously (ganged), or port power is individually switched on and off on a port- by-port basis (individual). The ability to support power enabling on a port or ganged basis is hardware implementation dependent. 0 = Ganged switching (all ports together) 1 = Individual port-by-port switching 4.2.1.8 Register 07h: Configuration Data Byte 2 B
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USB 2.0 Hi-Speed 2-Port Hub Controller Datasheet 4.2.1.9 Register 08h: Configuration Data Byte 3 BIT NUMBER BIT NAME DESCRIPTION 7:4 Reserved Reserved 3 PRTMAP_EN Port Re-mapping enable: Selects the method used by the hub to assign port numbers and disable ports. ‘0’ = Standard Mode ‘1’ = Port Re-map mode 2:0 Reserved Reserved 4.2.1.10 Register 09h: Non-Removable Device BIT NUMBER BIT NAME DESCRIPTION 7:0 NR_DEVICE Non-Removable Device: Indicates which port(s) include non-removable devices.
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USB 2.0 Hi-Speed 2-Port Hub Controller Datasheet 4.2.1.11 Register 0Ah: Port Disable For Self Powered Operation BIT NUMBER BIT NAME DESCRIPTION 7:0 PORT_DIS_SP Port Disable Self-Powered: Disables 1 or more contiguous ports. ‘0’ = port is available, ‘1’ = port is disabled. During Self-Powered operation when remapping mode is disabled (PRTMAP_EN='0'), this selects the ports which will be permanently disabled, and are not available to be enabled or enumerated by a Host Controller. The ports ca
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USB 2.0 Hi-Speed 2-Port Hub Controller Datasheet 4.2.1.13 Register 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 attach
