USB 2.0
Datasheet
Chapter 4 Block Diagram
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| To EEPROM or | ||
To Upstream | Upstream |
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| 24 MHz | SMBus Master | |||||||
VBUS | USB Data |
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| SDA SCK | ||||||||
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| Crystal | ||||||||||
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| 3.3 V |
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| Bus- |
| Regulator | PLL |
| Serial |
| Power | Upstream |
| Interface | ||
Detect/ | PHY |
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| Vbus Pulse |
| Serial |
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| Repeater | Interface |
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| Controller |
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| Engine |
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3.3 V |
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| TT |
| TT | Port |
Regulator |
| #1 ... | #x | Controller | |
| CRFILT |
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| Routing & Port |
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| Port #1 | ... |
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| Port #x |
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| PHY#1 | OC Sense | PHY#x |
| OC Sense |
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| Switch Driver/ | Switch Driver/ |
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| LED Drivers |
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| LED Drivers |
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USB Data OC | Port | USB Data OC | Port |
Downstream Sense | Power | Downstream Sense | Power |
Switch/ |
| Switch/ |
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LED |
| LED |
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Drivers |
| Drivers |
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Figure 4.1 USB251x Hub Family Block Diagram
Note 4.1 USB2512A/USB2512Ai only supports a single transaction translator.
Note 4.2 The LED port indicators only apply to USB2513/14 (48QFN only) and USB2517/17i.
SMSC USB251x | 11 | Revision 1.0 |
DATASHEET