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PDF USB2422 Data sheet ( Hoja de datos )
| Número de pieza | USB2422 | |
| Descripción | 2-Port USB 2.0 Hi-Speed Hub Controller | |
| Fabricantes | SMSC | |
| Logotipo |  |
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USB2422
2-Port USB 2.0 Hi-Speed Hub Controller
PRODUCT FEATURES
Datasheet
General Description
The SMSC USB2422 hub is a low-power, single transaction
translator, hub controller IC with two downstream ports for
embedded USB solutions. The SMSC hub controller can
attach to an upstream port as a Hi-Speed and Full-Speed
hub or as a Full-Speed only hub. The SMSC hub supports
Low-Speed, Full-Speed, and Hi-Speed (when configured as
a Hi-Speed hub) downstream devices on the enabled
downstream ports.
All required resistors on the USB ports are integrated into
the hub. This includes all series termination resistors on D+
and D- pins and all required pull-down and pull-up resistors
on D+ and D- pins. The over-current sense inputs for the
downstream facing ports have internal pull-up resistors.
Features
Supports the USB Battery Charging Specification,
Revision 1.1
Fully integrated USB termination and pull-up/pull-
down resistors
Supports a single external 3.3 V supply source;
internal regulators provide 1.2 V internal core voltage
On-chip driver for 24 MHz crystal resonator or
external 24 MHz clock input
ESD protection up to 6 kV on all USB pins
Supports self-powered operation
SMSC hub contains a built-in default configuration;
no external configuration options or components are
required
Downstream ports as non-removable ports
Downstream port power control and over-current
detection on an individual or ganged basis
Supports compound devices on a port-by-port basis
24-pin SQFN (4x4 mm), RoHS-compliant package
Commercial temperature range support:
0ºC to +70ºC
Industrial temperature range support:
-40ºC to +85ºC
Highlights
High performance, low-power, small footprint hub
controller IC with two downstream ports
Fully compliant with the USB 2.0 Specification
Optimized for minimal bill-of-materials and low-cost
designs
Applications
LCD monitors and TVs
Multi-function USB peripherals
PC motherboards
Set-top boxes, DVD players, DVR/PVR
Printers and scanners
PC media drive bay
Portable hub boxes
Mobile PC docking
Embedded systems
Gaming consoles
Cable/DSL modems
HDD enclosures
KVM switches
Server front panels
Point-of-Sale (POS) systems
IP telephony
Automobile/home audio systems
Thin client terminals
SMSC USB2422
DATASHEET
Revision 1.0 (06-04-13)
Free Datasheet http://www.datasheet4u.com/
1 page  
2-Port USB 2.0 Hi-Speed Hub Controller
Datasheet
4.4.19
4.4.20
4.4.21
4.4.22
4.4.23
4.4.24
4.4.25
4.4.26
4.4.27
4.4.28
4.4.29
4.4.30
4.4.31
Language ID Low Register (LANGIDL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Manufacturer String Length Register (MFRSL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Product String Length Register (PRDSL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Serial String Length Register (SERSL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Manufacturer String Registers (MANSTR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Product String Registers (PRDSTR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Serial String Registers (SERSTR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Battery Charging Enable Register (BC_EN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Boost Upstream Register (BOOSTUP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Boost Downstream Register (BOOST40) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Port Swap Register (PRTSP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Port 1/2 Remap Register (PRTR12) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Status/Command Register (STCD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Chapter 5 DC Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
5.1 Maximum Guaranteed Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
5.2 Operating Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
5.2.1 Pin Capacitance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Chapter 6 AC Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
6.1 Oscillator/Crystal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
6.2 External Clock. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
6.2.1 USB 2.0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
6.3 SMBus Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Chapter 7 Package Outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Chapter 8 Datasheet Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
SMSC USB2422
5
DATASHEET
Revision 1.0 (06-04-13)
Free Datasheet http://www.datasheet4u.com/
5 Page 
2-Port USB 2.0 Hi-Speed Hub Controller
Datasheet
2.3 Pin Descriptions (Grouped by Function)
Table 2.2 USB2422 Pin Descriptions
PIN BUFFER
# SYMBOL
TYPE
DESCRIPTION
19 USBDM_UP
20 USBDP_UP
16 VBUS_DET
UPSTREAM USB 2.0 INTERFACES
IO-U
USB Bus Data:
Connect to the upstream USB bus data signals (host, port, or
upstream hub).
I Detect Upstream VBUS Power:
Detects the 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 should be connected to
VBUS on the upstream port via a 2:1 voltage divider. Two 100 kΩ
resistors are suggested.
For self-powered applications with a permanently attached host, this
pin must be connected to a dedicated host control output, or
connected to the 3.3 V domain that powers the host (typically VDD33).
DOWNSTREAM USB 2.0 INTERFACES
5 USBDP_DN[2:1]/
3 PRT_DIS_P[2:1]
and and
4 USBDN_DN[2:1]/
2 PRT_DIS_M[2:1]
7 PRTPWR1/
BC_EN1
11 PRTPWR2
8 OCS1_N
12 OCS2_N
IO-U
O12
IPD
O12
IPU
Hi-Speed USB Data:
Connect to the downstream USB peripheral devices attached to the
hub’s ports.
Port Disable Strap Option:
If this strap is enabled by package and configuration settings (see
Table 4.1, "Hub Configuration Options"), this pin will be sampled at
RESET_N negation to determine if the port is disabled.
Both USB data pins for the corresponding port must be tied to VDD33
to disable the associated downstream port.
USB Power Enable:
Enables power to USB peripheral devices that are downstream, where
the hub supports active high power controllers only.
Battery Charging Strap Option:
Port 1 pin will be sampled at RESET_N negation to determine if port
1 supports the battery charging protocol (and thus the supporting
external port power controllers) that would enable a device to draw the
currents per the USB Battery Charging Specification.
This pin has an internal pull-down that will be removed after the strap
option hold time is completed.
BC_EN1= 1: Battery charging feature is supported for port 1
BC_EN1= 0: Battery charging feature is not supported for port 1
USB Power Enable:
Enables power to USB peripheral devices that are downstream, where
the hub supports active high power controllers only.
Over-Current Sense:
Input from external current monitor indicating an over-current
condition. This pin contains an internal pull-up to the 3.3 V supply.
SMSC USB2422
11
DATASHEET
Revision 1.0 (06-04-13)
Free Datasheet http://www.datasheet4u.com/
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet USB2422.PDF ] | |
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