SMSC USB2512Ai Datasheet Download Page 37 | Manualshive

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Industrial

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mper

ature

Rated USB 2.0

Hi-
S

pee

d 2-Port

Hub Contr

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ller

Dat

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Revision 1.97 (

08-1

1

-08)

37

SMSC U

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B251

2Ai

DA
T

ASHEET

Chapter 7 Package Outline

Figure 7.1 36-Pin QFN, 6x6mm Body, 0.5mm Pitch

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Summary of Contents for USB2512Ai

Page 1: ...and ESD protection performance OEM Selectable Features Customizable Vendor ID Product ID and Device ID Select whether the Hub is part of a compound device When any downstream port is permanently hardw...

Page 2: ...wn as anomalies which may cause the product s functions to deviate from published specifications Anomaly sheets are available upon request SMSC products are not designed intended authorized or warrant...

Page 3: ...M Programming 25 4 3 SMBus Slave Interface 25 4 3 1 Bus Protocols 25 4 3 2 Invalid Protocol Response Behavior 26 4 3 3 General Call Address Response 26 4 3 4 Slave Device Time Out 26 4 3 5 Stretching...

Page 4: ...e 2 1 USB2512Ai Block Diagram 7 Figure 4 1 Block Write 26 Figure 4 2 Block Read 26 Figure 4 3 Reset_N Timing for Default Strap Option Mode 28 Figure 4 4 Reset_N Timing for EEPROM Mode 29 Figure 4 5 Re...

Page 5: ...havior 11 Table 3 3 Power Ground and No Connect 11 Table 3 4 Buffer Type Descriptions 12 Table 4 1 Internal Default EEPROM and SMBus Register Memory Map 13 Table 4 2 Port Remap Register for Ports 1 2...

Page 6: ...Footprint Top View QFN 36 Indicates pins on the bottom of the device 26 VDD33 25 RESET_N 24 HS_IND CFG_SEL1 23 SCL SMBCLK CFG_SEL0 22 SDA SMBDATA NON_REM1 21 NC 20 NC 19 VBUS_DET 27 NC 18 NC 17 OCS2_N...

Page 7: ...pstream PHY Upstream USB Data Repeater Controller SIE Serial Interface PLL 24 M Hz Crystal To EEPROM or SM Bus M aster Routing Port Re Ordering Logic SCK SD TT Port Controller Bus Power Detect VBUS Pu...

Page 8: ...s SYMBOL QFN 36 EMB BUFFER TYPE DESCRIPTION UPSTREAM USB INTERFACES USBUP_DP USBUP_DM 31 30 IO U USB Bus Data These pins connect to the upstream USB bus data signals such as the Host port or upstream...

Page 9: ...Clock SMBCLK Configuration Select_SEL0 The logic state of this multifunction pin is internally latched on the rising edge of RESET_N RESET_N negation and will determine the Hub configuration method as...

Page 10: ...Hub is configured and is active i e not in suspend Local Power Detects availability of local self power source Low Self local power source is NOT available i e Hub gets all power from Upstream USB VBu...

Page 11: ...ttings Controlled by Registers Table 3 3 Power Ground and No Connect PACKAGE SYMBOL 36 QFN EMB FUNCTION VDD18 14 VDD Core This pin must have a 1 0 F or greater 20 ESR 0 1 capacitor to VSS VDD33PLL 36...

Page 12: ...tput IPD Input with internal weak pull down resistor IPU Input with internal weak pull up resistor IS Input with Schmitt trigger O12 Output 12mA I O12 Input Output buffer with 12mA sink and 12mA sourc...

Page 13: ...he USB 2 0 Specification a downstream port can never provide power to its D or D pull up resistors unless the upstream port s VBUS is in the asserted powered state The VBUS_DET pin on the Hub monitors...

Page 14: ...b Controller Max Current Bus HCMCB 32h 0x00 10h R W Power on Time PWRT 32h 0x00 11h F5h R W Reserved N A 01h 0x00 F6h R W Boost_Up BOOSTUP 00h 0x00 F7h R W Reserved N A 00h 0x00 F8h R W Boost_2 0 BOOS...

Page 15: ...r can assign that uniquely identifies this particular product assigned by OEM This field is set by the OEM using either the SMBus or EEPROM interface options BIT NUMBER BIT NAME DESCRIPTION 7 0 PID_MS...

Page 16: ...description under Dynamic Power for the self bus power functionality when dynamic power switching is enabled 0 Bus Powered operation 1 Self Powered operation Note If Dynamic Power Switching is enabled...

Page 17: ...ration When Dynamic Power switching is enabled the Hub detects the availability of a local power source by monitoring the external LOCAL_PWR pin If the Hub detects a change in power source availabilit...

Page 18: ...BIT NUMBER BIT NAME DESCRIPTION 7 0 NR_DEVICE Non removable Device Indicates which port s include non removable devices 0 port is removable 1 port is non removable Informs the Host if one of the acti...

Page 19: ...t 7 Reserved always 0 Bit 6 Reserved always 0 Bit 5 Reserved always 0 Bit 4 Reserved always 0 Bit 3 Reserved always 1 Bit 2 1 Port 2 is disabled Bit 1 1 Port 1 is disabled Bit 0 Reserved always 0 BIT...

Page 20: ...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 th...

Page 21: ...und device A value of 50 decimal would indicate 100mA which is the default value BIT NUMBER BIT NAME DESCRIPTION 7 0 POWER_ON_TIME Power On Time The length of time that it takes in 2 ms intervals from...

Page 22: ...e strength Boost Bit for Downstream Port 1 00 Normal electrical drive strength No boost 01 Elevated electrical drive strength Low approximately 4 boost 10 Elevated electrical drive strength Medium app...

Page 23: ...he hub is the Physical Port Number When remapping mode is enabled see PRTMAP_EN in Register 08h Configuration Data Byte 3 the hub s downstream port numbers can be remapped to different logical port nu...

Page 24: ...P conditions 4 2 2 1 Implementation Characteristics The Hub will only access an EEPROM using the Sequential Read Protocol 4 2 2 2 Pull Up Resistor The Circuit board designer is required to place exter...

Page 25: ...on 4 3 2 Invalid Protocol Response Behavior on page 26 Reference the System Management Bus Specification Rev 1 0 The SMBus interface is used to read and write the registers in the device The register...

Page 26: ...lave address are the registers defined in the Registers Section See Section 4 3 3 for the response to undefined registers 4 3 3 General Call Address Response The Hub does not respond to a general call...

Page 27: ...4 Default Configuration Option The SMSC Hub can be configured via its internal default configuration please see Section 4 2 1 Internal Register Set Common to EEPROM and SMBus for specific details on...

Page 28: ...e in most cases 00 h 5 The external crystal oscillator is halted 6 The PLL is halted The Hub is operational 500 s after RESET_N is negated Once operational the Hub immediately reads OEM specific data...

Page 29: ...Supplies must have reached the operating levels mandated in Chapter 5 DC Parameters prior to or coincident with the assertion of RESET_N t7 USB Idle undefined msec t8 Completion time for requests wit...

Page 30: ...sertion of RESET_N 4 6 3 USB Bus Reset In response to the upstream port signaling a reset to the Hub the Hub does the following Note The Hub does not propagate the upstream USB reset to downstream dev...

Page 31: ...1 08 DATASHEET 4 Clears all TT buffers 5 Moves device from suspended to active if suspended 6 Complies with Section 11 10 of the USB 2 0 Specification for behavior after completion of the reset sequen...

Page 32: ...mportant that the Absolute Maximum Ratings not be exceeded or device failure can result Some power supplies exhibit voltage spikes on their outputs when the AC power is switched on or off In addition...

Page 33: ...w 3 0V then the MAX becomes 3 3V supply voltage 0 5 Voltage on XTAL1 0 3 VDDA33 V Table 5 1 DC Electrical Characteristics PARAMETER SYMBOL MIN TYP MAX UNITS COMMENTS I IS Type Input Buffer Low Input L...

Page 34: ...IOL VHYSC 2 4 10 250 0 4 10 350 V V uA mV IOL 12mA VDD33 3 3V IOH 12mA VDD33 3 3V VIN 0 to VDD33 Note 1 IO U Note 2 Supply Current Unconfigured Hi Speed Host Full Speed Host ICCINTHS ICCINITFS 75 65 8...

Page 35: ...97 08 11 08 DATASHEET CAPACITANCE TA 25 C fc 1MHz VDD18 VDDPLL 1 8V Table 5 2 Pin Capacitance LIMITS PARAMETER SYMBOL MIN TYP MAX UNIT TEST CONDITION Clock Input Capacitance CXTAL 2 pF All pins excep...

Page 36: ...la to find value of C1 and C2 6 1 1 SMBus Interface The SMSC Hub conforms to all voltage power and timing characteristics and specifications as set forth in the SMBus 1 0 Specification for Slave Only...

Page 37: ...Industrial Temperature Rated USB 2 0 Hi Speed 2 Port Hub Controller Datasheet Revision 1 97 08 11 08 37 SMSC USB2512Ai DATASHEET Chapter 7 Package Outline Figure 7 1 36 Pin QFN 6x6mm Body 0 5mm Pitch...

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