Manuale d’uso / di manutenzione del prodotto USB2512i del fabbricante SMSC
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SMSC USB2512i DA T ASHEET Revision 1.92 (1 1-28-07) Datasheet PRODUCT FEA TURES USB2512i Industrial T emperature Rated USB 2.0 High-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 NUMBER(S): USB2512i-AEZG FOR 36 PIN, QFN LE AD-FREE ROHS COMPLIANT PACKAGE Industrial T emperature Rated USB 2.0 High-Speed 2-Port Hub Controller Datasheet Revision 1.92 (1 1-28-07) 2 SMSC USB2512i DA T ASHEET 80 ARKA Y DRIVE, HAUPP AUGE, NY 1 1788 (631) 435-6 000, FA X (631) 273-3123 Copyright © 20 07 SMSC or its subsidiari es.
Industrial T emperature Rated USB 2.0 High-Speed 2-Port Hub Controller Datasheet SMSC USB2512i 3 Revision 1.92 (1 1-28-07) DA T ASHEET T able of Content s Chapter 1 Pin Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Industrial T emperature Rated USB 2.0 High-Speed 2-Port Hub Controller Datasheet Revision 1.92 (1 1-28-07) 4 SMSC USB2512i DA T ASHEET List of Figures Figure 1.1 USB2512i 36-Pin QFN (Embedded Footprint) . . . . . . . . . . . . . . . . . . . . . . . . .
Industrial T emperature Rated USB 2.0 High-Speed 2-Port Hub Controller Datasheet SMSC USB2512i 5 Revision 1.92 (1 1-28-07) DA T ASHEET List of T ables Table 3.1 USB2512i Pin Des criptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Industrial T emperature Rated USB 2.0 High-Speed 2-Port Hub Controller Datasheet Revision 1.92 (1 1-28-07) 6 SMSC USB2512i DA T ASHEET Chapter 1 Pin Configuration Figure 1.
Industrial T emperature Rated USB 2.0 High-Speed 2-Port Hub Controller Datasheet SMSC USB2512i 7 Revision 1.92 (1 1-28-07) DA T ASHEET Chapter 2 Block Diagram Figure 2.
Industrial T emperature Rated USB 2.0 High-Speed 2-Port Hub Controller Datasheet Revision 1.92 (1 1-28-07) 8 SMSC USB2512i 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.
Industrial T emperature Rated USB 2.0 High-Speed 2-Port Hub Controller Datasheet SMSC USB2512i 9 Revision 1.92 (1 1-28-07) DA T ASHEET SERIAL PORT INTERF ACE SDA/ SMBDA T A/ NON_REM1 22 I/OSD12 Serial Data / SMB Data & Port Non Removable S trap Option NON_REM1: Non removable port strap option.
Industrial T emperature Rated USB 2.0 High-Speed 2-Port Hub Controller Datasheet Revision 1.92 (1 1-28-07) 10 SMSC USB2512i 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.
Industrial T emperature Rated USB 2.0 High-Speed 2-Port Hub Controller Datasheet SMSC USB2512i 1 1 Revision 1.92 (1 1-28-07) DA T ASHEET 0 1 Configured as an SMBus slave for e xternal download of user-defined descriptors .
Industrial T emperature Rated USB 2.0 High-Speed 2-Port Hub Controller Datasheet Revision 1.92 (1 1-28-07) 12 SMSC USB2512i DA T ASHEET 3.2 Buffer T ype Descriptions T able 3.4 USB2512i Buffer T ype Descriptions BUFFER DESCRIPTION I Input. IPD Input with internal weak pull -down resistor .
Industrial T emperature Rated USB 2.0 High-Speed 2-Port Hub Controller Datasheet SMSC USB2512i 13 Revision 1.92 (1 1-28-07) 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 pecification Revision 2.
Industrial T emperature Rated USB 2.0 High-Speed 2-Port Hub Controller Datasheet Revision 1.92 (1 1-28-07) 14 SMSC USB2512i DA T ASHEET 4.2.1.1 Register 00h: V e ndor ID (LSB) 03h R/W PID MSB PIDM 25h.
Industrial T emperature Rated USB 2.0 High-Speed 2-Port Hub Controller Datasheet SMSC USB2512i 15 Revision 1.92 (1 1-28-07) 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.
Industrial T emperature Rated USB 2.0 High-Speed 2-Port Hub Controller Datasheet Revision 1.92 (1 1-28-07) 16 SMSC USB2512i 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.
Industrial T emperature Rated USB 2.0 High-Speed 2-Port Hub Controller Datasheet SMSC USB2512i 17 Revision 1.92 (1 1-28-07) DA T ASHEET 4.2.1.8 Register 07h: Configurat ion Data Byte 2 0 PORT_PWR Port.
Industrial T emperature Rated USB 2.0 High-Speed 2-Port Hub Controller Datasheet Revision 1.92 (1 1-28-07) 18 SMSC USB2512i DA T ASHEET 4.2.1.9 Register 08h: Configurat ion Data Byte 3 4.
Industrial T emperature Rated USB 2.0 High-Speed 2-Port Hub Controller Datasheet SMSC USB2512i 19 Revision 1.92 (1 1-28-07) 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 Operation 4.
Industrial T emperature Rated USB 2.0 High-Speed 2-Port Hub Controller Datasheet Revision 1.92 (1 1-28-07) 20 SMSC USB2512i DA T ASHEET 4.2.1.14 Register 0Dh: Max Power For Bus Powered Operation 4.2.1.15 Register 0Eh: Hub Controller Max Current Fo r Self Powered Operation 4.
Industrial T emperature Rated USB 2.0 High-Speed 2-Port Hub Controller Datasheet SMSC USB2512i 21 Revision 1.92 (1 1-28-07) DA T ASHEET 4.2.1.17 Register 10h: Power-On T ime 4.
Industrial T emperature Rated USB 2.0 High-Speed 2-Port Hub Controller Datasheet Revision 1.92 (1 1-28-07) 22 SMSC USB2512i DA T ASHEET 4.2.1.20 Register F Ah: Port Swap BIT NUMBER BIT NAME DESCRIPTION 7:0 PRTSP Port Swap: Swaps the Upstream a nd Downstream USB DP and DM Pins for ease of board routing to devices and con nectors.
Industrial T emperature Rated USB 2.0 High-Speed 2-Port Hub Controller Datasheet SMSC USB2512i 23 Revision 1.92 (1 1-28-07) 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.
Industrial T emperature Rated USB 2.0 High-Speed 2-Port Hub Controller Datasheet Revision 1.92 (1 1-28-07) 24 SMSC USB2512i DA T ASHEET 4.2.1.22 Register FFh: S tatus /Command 4.
Industrial T emperature Rated USB 2.0 High-Speed 2-Port Hub Controller Datasheet SMSC USB2512i 25 Revision 1.92 (1 1-28-07) 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).
Industrial T emperature Rated USB 2.0 High-Speed 2-Port Hub Controller Datasheet Revision 1.92 (1 1-28-07) 26 SMSC USB2512i DA T ASHEET Figure 4.1 Block Write Block Read A Block Read differs from a block write in that the repe ated start condition exists to satisfy the I2C specification’s requirement for a ch ange in the t ransfer direction.
Industrial T emperature Rated USB 2.0 High-Speed 2-Port Hub Controller Datasheet SMSC USB2512i 27 Revision 1.92 (1 1-28-07) 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.
Industrial T emperature Rated USB 2.0 High-Speed 2-Port Hub Controller Datasheet Revision 1.92 (1 1-28-07) 28 SMSC USB2512i 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.
Industrial T emperature Rated USB 2.0 High-Speed 2-Port Hub Controller Datasheet SMSC USB2512i 29 Revision 1.92 (1 1-28-07) 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.
Industrial T emperature Rated USB 2.0 High-Speed 2-Port Hub Controller Datasheet Revision 1.92 (1 1-28-07) 30 SMSC USB2512i DA T ASHEET 4.6.2.3 RESET_N for SMBus Slave Configuration Figure 4.5 Reset_N Timing for SMBus Mode Notes: For Bus-Powered configu rations, the 99.
Industrial T emperature Rated USB 2.0 High-Speed 2-Port Hub Controller Datasheet SMSC USB2512i 31 Revision 1.92 (1 1-28-07) 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.
Industrial T emperature Rated USB 2.0 High-Speed 2-Port Hub Controller Datasheet Revision 1.92 (1 1-28-07) 32 SMSC USB2512i DA T ASHEET Chapter 5 DC Parameters 5.1 Maximum Guaranteed Ratings Note: S tresses above th e specified parameters coul d cause permanent damag e to the device.
Industrial T emperature Rated USB 2.0 High-Speed 2-Port Hub Controller Datasheet SMSC USB2512i 33 Revision 1.92 (1 1-28-07) DA T ASHEET V oltage on XT AL1 -0.
Industrial T emperature Rated USB 2.0 High-Speed 2-Port Hub Controller Datasheet Revision 1.92 (1 1-28-07) 34 SMSC USB2512i DA T ASHEET Notes: 1. Output leakage i s measured with the current pin s in high impedance. 2. See USB 2.0 S pecification for U SB DC electrical characteristics.
Industrial T emperature Rated USB 2.0 High-Speed 2-Port Hub Controller Datasheet SMSC USB2512i 35 Revision 1.92 (1 1-28-07) DA T ASHEET CAP ACIT ANCE T A = 25°C; fc = 1MHz; V DD18 , V DDPLL = 1.
Industrial T emperature Rated USB 2.0 High-Speed 2-Port Hub Controller Datasheet Revision 1.92 (1 1-28-07) 36 SMSC USB2512i 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, Jitte r < 100 ps rms.
SMSC USB2512i 37 Revision 1.92 (1 1-28-07) DA T ASHEET Chapter 7 Package Outline Figure 7.1 36-Pin QFN, 6x6mm Body , 0.5mm Pitch.
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 USB2512i 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 USB2512i - in questo modo è possibile verificare se l’apparecchio soddisfa le tue esigenze. Esplorando le pagine segenti del manuali d’uso SMSC USB2512i imparerai tutte le caratteristiche del prodotto e le informazioni sul suo funzionamento. Le informazioni sul SMSC USB2512i ti aiuteranno sicuramente a prendere una decisione relativa all’acquisto.
In una situazione in cui hai già il SMSC USB2512i, 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 USB2512i.
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 USB2512i. Quasi sempre, ci troverai Troubleshooting, cioè i guasti più frequenti e malfunzionamenti del dispositivo SMSC USB2512i 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.