Manuale d’uso / di manutenzione del prodotto USB2512A del fabbricante SMSC
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SMSC USB2512A DA T ASHEET Revision 1.96 (07-1 1- 08) Datasheet PRODUCT FEA TURES USB2512A USB 2.0 Hi-S peed 2-Port Hub Controller General Description The SMSC 2-Port Hub is a low power , OEM configurable, STT (Single transaction translator) hub controller IC with 2 downstream ports for embedded USB solutions.
ORDER NUMBERS: USB2512A-AEZG FOR 36 PIN, QFN LEAD-FREE ROH S COMPLIANT PACKAGE USB 2.0 Hi-S peed 2-Port Hub Controller Datasheet Revision 1.96 (07-1 1-08) 2 SMSC USB2512A DA T ASHEET 80 ARKA Y DRIVE, HAUPP AUGE, NY 1 1788 (631) 435-6000 , F AX (631) 273 -3123 Copyright © 20 08 SMSC or it s subsidiaries.
USB 2.0 Hi-S peed 2- Port Hub Controller Datasheet SMSC USB2512A 3 Revision 1.96 (07-1 1-08) DA T ASHEET T able of Content s Chapter 1 Pin Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
USB 2.0 Hi-S peed 2- Port Hub Controller Datasheet Revision 1.96 (07-1 1-08) 4 SMSC USB2512A DA T ASHEET List of Figures Figure 1.1 USB2512A 36-Pin QFN (Embedded Footprint) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Figure 2.
USB 2.0 Hi-S peed 2- Port Hub Controller Datasheet SMSC USB2512A 5 Revision 1.96 (07-1 1-08) DA T ASHEET List of T ables Table 3.1 USB2512A Pin Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
USB 2.0 Hi-S peed 2- Port Hub Controller Datasheet Revision 1.96 (07-1 1-08) 6 SMSC USB2512A DA T ASHEET Chapter 1 Pin Configuration Figure 1.1 USB2512A 36-Pin QFN (Emb edded Footprint) Thermal Slug (must be connected to VSS) SMSC USB2512A Embedded Footprint (Top View Q FN-3 6) Indicates pins on the bottom of the devi ce.
USB 2.0 Hi-S peed 2- Port Hub Controller Datasheet SMSC USB2512A 7 Revision 1.96 (07-1 1-08) DA T ASHEET Chapter 2 Block Diagram Figure 2.1 USB2512A Block Diagram To U pst ream V BUS 3.
USB 2.0 Hi-S peed 2- Port Hub Controller Datasheet Revision 1.96 (07-1 1-08) 8 SMSC USB2512A DA T ASHEET 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.
USB 2.0 Hi-S peed 2- Port Hub Controller Datasheet SMSC USB2512A 9 Revision 1.96 (07-1 1-08) DA T ASHEET RBIAS 35 I-R USB T ranscei ver Bias A 12.0k Ω (+/- 1%) resistor is attached from ground to this pin to set the transceiver ’s internal bias settings.
USB 2.0 Hi-S peed 2- Port Hub Controller Datasheet Revision 1.96 (07-1 1-08) 10 SMSC USB2512A DA T ASHEET XT AL2 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 XT AL1/CLKIN.
USB 2.0 Hi-S peed 2- Port Hub Controller Datasheet SMSC USB2512A 1 1 Revision 1.96 (07-1 1-08) DA T ASHEET T able 3.2 SMBus or EEPROM Interface Behavior CFG_SEL1 CFG_SEL0 SMBUS OR EEPROM INTERFACE BEH.
USB 2.0 Hi-S peed 2- Port Hub Controller Datasheet Revision 1.96 (07-1 1-08) 12 SMSC USB2512A DA T ASHEET 3.2 Buffer T ype Descriptions T able 3.4 USB2512A Buffer T y pe Des criptions BUFFER DESCRIPTION I Input. IPD Input with internal weak pull -down resistor .
USB 2.0 Hi-S peed 2- Port Hub Controller Datasheet SMSC USB2512A 13 Revision 1.96 (07-1 1-08) DA T ASHEET Chapter 4 Configuration Options 4.1 2-Port Hub SMSC’s USB 2.0 2-Port Hub is fully specification co mpliant to the Universal Serial Bus S peci fication Revision 2.
USB 2.0 Hi-S peed 2- Port Hub Controller Datasheet Revision 1.96 (07-1 1-08) 14 SMSC USB2512A DA T ASHEET 4.2.1.1 Register 00h: V e ndor ID (LSB) 03h R/W PID MSB PIDM 25h 0x00 04h R/W DID LSB DIDL A0h.
USB 2.0 Hi-S peed 2- Port Hub Controller Datasheet SMSC USB2512A 15 Revision 1.96 (07-1 1-08) DA T ASHEET 4.2.1.2 Register 01h: V e ndor ID (MSB) 4.2.1.3 Register 02h: Product ID (LSB) 4.2.1.4 Register 03h: Product ID (MSB) 4.2.1.5 Register 04h: Device ID (LSB) 4.
USB 2.0 Hi-S peed 2- Port Hub Controller Datasheet Revision 1.96 (07-1 1-08) 16 SMSC USB2512A DA T ASHEET 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.
USB 2.0 Hi-S peed 2- Port Hub Controller Datasheet SMSC USB2512A 17 Revision 1.96 (07-1 1-08) DA T ASHEET 4.2.1.8 Register 07h: Configurat ion Dat a Byte 2 0 PORT_PWR Port Power Switchi ng: Enables power switching on all ports simultaneously (ganged), or port power is indi vidually sw itched on and off on a port- by-port basis (individual).
USB 2.0 Hi-S peed 2- Port Hub Controller Datasheet Revision 1.96 (07-1 1-08) 18 SMSC USB2512A DA T ASHEET 4.2.1.9 Register 08h: Configurat ion Dat a Byte 3 4.
USB 2.0 Hi-S peed 2- Port Hub Controller Datasheet SMSC USB2512A 19 Revision 1.96 (07-1 1-08) DA T ASHEET 4.2.1.1 1 Register 0Ah: Port Disa ble For Self Powered Operation 4.2.1.12 Register 0Bh: Port Di sable For Bus Powered Op eration BIT NUMBER BIT NAME DESCRIPTION 7:0 PORT_DIS_SP Port Disable Self-Powered: Disables 1 or more contiguous p orts.
USB 2.0 Hi-S peed 2- Port Hub Controller Datasheet Revision 1.96 (07-1 1-08) 20 SMSC USB2512A DA T ASHEET 4.2.1.13 Register 0Ch: Max Powe r For Self Powered Opera tion 4.
USB 2.0 Hi-S peed 2- Port Hub Controller Datasheet SMSC USB2512A 21 Revision 1.96 (07-1 1-08) DA T ASHEET 4.2.1.16 Register 0Fh: Hu b Controller Max Current For Bus Powered Operatio n 4.2.1.17 Register 10h: Power-On T ime 4.2.1.18 Register F6h: Bo ost_Up 4.
USB 2.0 Hi-S peed 2- Port Hub Controller Datasheet Revision 1.96 (07-1 1-08) 22 SMSC USB2512A DA T ASHEET 4.2.1.20 Register F Ah: Port Swap 3:2 BOOST_IOUT_2 USB el ectrical signaling drive strength Boost Bit for Downstream Port ‘2’.
USB 2.0 Hi-S peed 2- Port Hub Controller Datasheet SMSC USB2512A 23 Revision 1.96 (07-1 1-08) DA T ASHEET 4.2.1.21 Register FBh: Port Remap 12 BIT NUMBER BIT NAME DESCRIPTION 7:0 PRTR12 Port remap register for ports 1 & 2.
USB 2.0 Hi-S peed 2- Port Hub Controller Datasheet Revision 1.96 (07-1 1-08) 24 SMSC USB2512A DA T ASHEET 4.2.1.22 Register FFh: S tatus/Command 4.2.2 I 2 C EEPROM The I 2 C EEPROM interface implement.
USB 2.0 Hi-S peed 2- Port Hub Controller Datasheet SMSC USB2512A 25 Revision 1.96 (07-1 1-08) DA T ASHEET 4.2.3 In-Circuit EEPROM Programming The EEPROM can be programmed via A T E by pulling RESET_N low (which tri-states the Hub’ s EEPROM interface and allows an exter nal source to program the EEPROM).
USB 2.0 Hi-S peed 2- Port Hub Controller Datasheet Revision 1.96 (07-1 1-08) 26 SMSC USB2512A DA T ASHEET Figure 4.1 Block Write Block Read A Block Read differs from a block write in that th e repeated start conditio n exists to satisfy the I 2 C specification’s requirement for a ch ange in the t ransfer direction .
USB 2.0 Hi-S peed 2- Port Hub Controller Datasheet SMSC USB2512A 27 Revision 1.96 (07-1 1-08) DA T ASHEET 4.3.5 Stretching the SCLK Signal The Hub supports stretching o f the SCLK by othe r device s on the SMBus. The Hub does not stretch the SCLK. 4.3.
USB 2.0 Hi-S peed 2- Port Hub Controller Datasheet Revision 1.96 (07-1 1-08) 28 SMSC USB2512A DA T ASHEET 4.6.2 External Hardware RESET_N A valid hardware reset is defined as assertion of RESET_N for a minimum of 1us after all power supplies are within ope rating range.
USB 2.0 Hi-S peed 2- Port Hub Controller Datasheet SMSC USB2512A 29 Revision 1.96 (07-1 1-08) DA T ASHEET 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.
USB 2.0 Hi-S peed 2- Port Hub Controller Datasheet Revision 1.96 (07-1 1-08) 30 SMSC USB2512A DA T ASHEET 4.6.2.3 RESET_N for SMBus Slave Configuration Figure 4.
USB 2.0 Hi-S peed 2- Port Hub Controller Datasheet SMSC USB2512A 31 Revision 1.96 (07-1 1-08) DA T ASHEET 4. Clears all TT buffers. 5. Moves device from suspended to active (if suspende d). 6. Complies with Section 1 1.10 of the USB 2.0 S pecif ication for be havior after completion of the reset sequence.
USB 2.0 Hi-S peed 2- Port Hub Controller Datasheet Revision 1.96 (07-1 1-08) 32 SMSC USB2512A DA T ASHEET Chapter 5 DC Parameters 5.1 Maximum Guaranteed Ratings Note 5.1 S tresses above the specified parameters co uld cause permanent damag e to the device.
USB 2.0 Hi-S peed 2- Port Hub Controller Datasheet SMSC USB2512A 33 Revision 1.96 (07-1 1-08) DA T ASHEET 5.2 Operating Conditions PARAMETER SYMBOL MIN MAX UNITS COMMENT S Operating T e mperature T A 0 70 °C Ambient temperature in still a ir . 1.8V supply voltage V DDA18PLL V DD18 1.
USB 2.0 Hi-S peed 2- Port Hub Controller Datasheet Revision 1.96 (07-1 1-08) 34 SMSC USB2512A DA T ASHEET Notes: 1. Output leakage i s measured with the current pins in high impedance. 2. See USB 2.0 S pecification for U SB DC electrical characteristics.
USB 2.0 Hi-S peed 2- Port Hub Controller Datasheet SMSC USB2512A 35 Revision 1.96 (07-1 1-08) DA T ASHEET CAP ACIT ANCE T A = 25°C; fc = 1MHz; V DD18 , V DDPLL = 1.
USB 2.0 Hi-S peed 2- Port Hub Controller Datasheet Revision 1.96 (07-1 1-08) 36 SMSC USB2512A DA T ASHEET Chapter 6 AC S pecifications 6.1 Oscillator/Clock Crystal: Parallel Resonant, Fundamental Mode, 24 MHz ± 350ppm. External Clock: 50% Duty cycl e ± 1 0 % , 2 4 M H z ± 350ppm, Jitter < 100 ps rms.
USB 2.0 Hi-S peed 2- Port Hub Controller Datasheet Revision 1.96 (07-1 1-08) 37 SMSC USB2512A DA T ASHEET Chapter 7 Package Outline Figure 7.1 36-Pin QFN, 6x6mm Body , 0.
Un punto importante, dopo l’acquisto del dispositivo (o anche prima di acquisto) è quello di leggere il manuale. Dobbiamo farlo per diversi motivi semplici:
Se non hai ancora comprato il SMSC USB2512A è un buon momento per familiarizzare con i dati di base del prodotto. Prime consultare le pagine iniziali del manuale d’uso, che si trova al di sopra. Dovresti trovare lì i dati tecnici più importanti del SMSC USB2512A - in questo modo è possibile verificare se l’apparecchio soddisfa le tue esigenze. Esplorando le pagine segenti del manuali d’uso SMSC USB2512A imparerai tutte le caratteristiche del prodotto e le informazioni sul suo funzionamento. Le informazioni sul SMSC USB2512A ti aiuteranno sicuramente a prendere una decisione relativa all’acquisto.
In una situazione in cui hai già il SMSC USB2512A, ma non hai ancora letto il manuale d’uso, dovresti farlo per le ragioni sopra descritte. Saprai quindi se hai correttamente usato le funzioni disponibili, e se hai commesso errori che possono ridurre la durata di vita del SMSC USB2512A.
Tuttavia, uno dei ruoli più importanti per l’utente svolti dal manuale d’uso è quello di aiutare a risolvere i problemi con il SMSC USB2512A. Quasi sempre, ci troverai Troubleshooting, cioè i guasti più frequenti e malfunzionamenti del dispositivo SMSC USB2512A insieme con le istruzioni su come risolverli. Anche se non si riesci a risolvere il problema, il manuale d’uso ti mostrerà il percorso di ulteriori procedimenti – il contatto con il centro servizio clienti o il servizio più vicino.