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Un buon manuale d’uso
Le regole impongono al rivenditore l'obbligo di fornire all'acquirente, insieme alle merci, il manuale d’uso SMSC USB2512i. La mancanza del manuale d’uso o le informazioni errate fornite al consumatore sono la base di una denuncia in caso di inosservanza del dispositivo con il contratto. Secondo la legge, l’inclusione del manuale d’uso in una forma diversa da quella cartacea è permessa, che viene spesso utilizzato recentemente, includendo una forma grafica o elettronica SMSC USB2512i o video didattici per gli utenti. La condizione è il suo carattere leggibile e comprensibile.
Che cosa è il manuale d’uso?
La parola deriva dal latino "instructio", cioè organizzare. Così, il manuale d’uso SMSC USB2512i descrive le fasi del procedimento. Lo scopo del manuale d’uso è istruire, facilitare lo avviamento, l'uso di attrezzature o l’esecuzione di determinate azioni. Il manuale è una raccolta di informazioni sull'oggetto/servizio, un suggerimento.
Purtroppo, pochi utenti prendono il tempo di leggere il manuale d’uso, e un buono manuale non solo permette di conoscere una serie di funzionalità aggiuntive del dispositivo acquistato, ma anche evitare la maggioranza dei guasti.
Quindi cosa dovrebbe contenere il manuale perfetto?
Innanzitutto, il manuale d’uso SMSC USB2512i dovrebbe contenere:
- informazioni sui dati tecnici del dispositivo SMSC USB2512i
- nome del fabbricante e anno di fabbricazione SMSC USB2512i
- istruzioni per l'uso, la regolazione e la manutenzione delle attrezzature SMSC USB2512i
- segnaletica di sicurezza e certificati che confermano la conformità con le norme pertinenti
Perché non leggiamo i manuali d’uso?
Generalmente questo è dovuto alla mancanza di tempo e certezza per quanto riguarda la funzionalità specifica delle attrezzature acquistate. Purtroppo, la connessione e l’avvio SMSC USB2512i non sono sufficienti. Questo manuale contiene una serie di linee guida per funzionalità specifiche, la sicurezza, metodi di manutenzione (anche i mezzi che dovrebbero essere usati), eventuali difetti SMSC USB2512i e modi per risolvere i problemi più comuni durante l'uso. Infine, il manuale contiene le coordinate del servizio SMSC in assenza dell'efficacia delle soluzioni proposte. Attualmente, i manuali d’uso sotto forma di animazioni interessanti e video didattici che sono migliori che la brochure suscitano un interesse considerevole. Questo tipo di manuale permette all'utente di visualizzare tutto il video didattico senza saltare le specifiche e complicate descrizioni tecniche SMSC USB2512i, come nel caso della versione cartacea.
Perché leggere il manuale d’uso?
Prima di tutto, contiene la risposta sulla struttura, le possibilità del dispositivo SMSC USB2512i, l'uso di vari accessori ed una serie di informazioni per sfruttare totalmente tutte le caratteristiche e servizi.
Dopo l'acquisto di successo di attrezzature/dispositivo, prendere un momento per familiarizzare con tutte le parti del manuale d'uso SMSC USB2512i. Attualmente, sono preparati con cura e tradotti per essere comprensibili non solo per gli utenti, ma per svolgere la loro funzione di base di informazioni e di aiuto.
Sommario del manuale d’uso
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Pagina 1
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. The 2-po[...]
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Pagina 2
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. All rights r[...]
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Pagina 3
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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Chapter 2 Block Diagram . . . . . . . . . . . . . . . . . . . . .[...]
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Pagina 4
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) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Figure 2.1 USB2512i Block Diagram . . . . . . . . . . . . . . . . . . .[...]
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Pagina 5
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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Table 3.2 SMBus or EEPROM Interfac e Behavior . . . . . [...]
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Pagina 6
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 1.1 USB2512i 36-Pin QFN (Embedded Footprin t) Thermal Slug (must be c onnected to VSS) SMSC USB2512i Embedded Footprint (Top View QFN-36) Indicates pins on th e bottom of the de vi[...]
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Pagina 7
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 2.1 USB2512i Block Diagram To U pst r eam V BUS 3. 3V U pst ream PHY Up st r ea m USB Da t a R epeat er Cont r o l l er SI E Ser i a l In te r f a c e PLL 24 M H z Cryst al To EEPRO M [...]
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Pagina 8
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. The “N” symbol [...]
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Pagina 9
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. If this strap is enabled by package and configura t[...]
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Pagina 10
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. This output must not be use d to drive any extern[...]
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Pagina 11
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 . SMBus slave address 58 (0101 100x) S trap Options Disabled All Settings Controlled by Re gisters 1 0 Internal Defau[...]
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Pagina 12
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 . IPU Input with internal weak pull-u p resistor . IS Input w[...]
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Pagina 13
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 2.0 April 27,2000 (12/7/2000 and 5/28/ 2002 Errata). [...]
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Pagina 14
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 0x00 04h R/W DID LSB DIDL 00h 0x00 05h R/W DID MSB DIDM 00h 0x00 06h R/W Co nfig Data Byte 1 CFG1 8Bh 0x00 07h R/W Config Data Byte 2 CFG2 10h 0x00 0[...]
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Pagina 15
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) 4.2.1.5 Register 04h: Device ID (LSB) 4.2.1.6 Register 05h: Device ID (MSB) BIT NUMBER BIT NAME [...]
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Pagina 16
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. The Hub is either Sel f-Powered (dra ws less than 2mA of upstre[...]
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Pagina 17
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 Power Switchi ng: Enables power switching on all ports simultaneously (ganged), or port power is individually switched on and off on a port- by-port [...]
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Pagina 18
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 4.2.1.10 Register 09h: No n-Removable Device BIT NUMBER BIT NAME DESCRIPTION 7:4 Reserved Reserved 3 PRTMAP_EN Port Re-ma pping enable: Selects the method used by th[...]
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Pagina 19
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 4.2.1.13 Register 0Ch: Max Powe r For Self Powered Operation BIT NUMBER BIT NAME DESCR[...]
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Pagina 20
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 4.2.1.16 Register 0Fh: Hu b Controller Max Current For Bus Powere d Operation[...]
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Pagina 21
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 4.2.1.18 Register F6h: Bo ost_Up 4.2.1.19 Register F8h: Boost_2:0 BIT NUMBER BIT NAME DESCRIPTION 7:0 POWER_ON_TIME Power On T ime: The length of time that it takes (in 2 ms in[...]
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Pagina 22
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. ‘0’ = USB D+ fu[...]
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Pagina 23
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. When a hub is enumerated b y a USB Host Controller , the hub is only permitted to report how [...]
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Pagina 24
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 4.2.2 I2C EEPROM The I2C EEPROM interface implement s a subset of the I2C Master S pecification (Please refer to the Philips Semiconductor S tandard I2C-Bus Specification for[...]
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Pagina 25
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). 4.3 SMBus Sla[...]
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Pagina 26
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. Figu[...]
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Pagina 27
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. 4.3.6 SMBus Timing The SMBus Slave Interface co mplie s with the SMBus A[...]
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Pagina 28
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. While reset is asserted, the Hub (and its associa[...]
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Pagina 29
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. All Power Supplies mu st have reached the op erating l[...]
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Pagina 30
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 99.5ms (MAX) is requi red, and the Hub an d its associated circuitry must not c[...]
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Pagina 31
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 2.0 S pecif ication for behavior after completion of the reset sequence. The Host then [...]
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Pagina 32
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. This is a stress rating only and functional operation of the devi[...]
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Pagina 33
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 -0.3 V DDA33 V V oltage on XT AL2 -0.3 V DD18 V T ab le 5.1 DC Electrical Characteristics PARAMETER SYMBOL MIN T YP MAX UNIT S COMMENT S I, IS T ype Input Buffe r Low Input Leve l High Input Leve[...]
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Pagina 34
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. Supply Current Unconfigured High-S peed Host Full-S peed Host I [...]
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Pagina 35
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 = 1.8 V T able 5.2 Pin Cap acit ance LIMIT S PARAMETER SYMBOL MIN T YP MAX UNIT T EST CONDITION Clock Input Capacitance C XT AL 2 pF All pins except USB pins ([...]
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Pagina 36
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. Figure 6.1 [...]
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Pagina 37
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[...]