USB2507(2006) Ver la hoja de datos (PDF) - SMSC -> Microchip
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USB2507 Datasheet PDF : 44 Pages
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Integrated USB 2.0 Compatible 7-Port Hub
Datasheet
Chapter 4 7-Port Hub Block Diagram
Upstream Upstream 24 MHz
USB Data VBUS Crystal
3.3V
To
Pin EEPROM
1.8V Strapping or SMBus
Cap Options Master
SD SCL
VBUS
Upstream Power
PLL
1.8V
Reg.
PHY
Detect
Repeater
SIE
Internal
Defaults
Select
Serial
Interface
Controller
TT
#1
TT
#2
...
TT
#7
Port
Controller
Routing Logic
... Port #1
Downstream OC Sense
Port #7
Downstream OC Sense
PHY #1 Switch Driver
PHY #7 Switch Driver
LED Drivers
LED Drivers
Downstream OC Switch/LED
USB Data Sense Drivers
Downstream OC Switch/LED
USB Data Sense Drivers
Figure 4.1 7-Port Block Diagram
NAME
USB Bus Data
Detect Upstream
VBUS Power
Table 4.1 7-Port Hub Pin Descriptions
SYMBOL
TYPE
FUNCTION
UPSTREAM USB 2.0 INTERFACE
USBDN0
USBDP0
VBUS_DET
IO-U
These pins connect to the upstream USB bus data signals.
I/O12
Detects state of Upstream VBUS power. The SMSC Hub
monitors VBUS_DET to determine when to assert the
internal D+ pull-up resistor (signalling a connect event).
When designing a detachable hub, this pin must be
connected to the VBUS power pin of the USB port that is
upstream of the hub. (Use of a weak pull-down resistor is
recommended.)
For self-powered applications with a permanently attached
host, this pin must be pulled-up to either 3.3V or 5.0V
(typically VDD33).
SMSC USB2507
9
DATASHEET
Revision 2.1 (12-06-06)
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