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參數(shù)資料
| 型號： | AT43312A-SC |
| 廠商： | ATMEL CORP |
| 元件分類： | 總線控制器 |
| 英文描述： | Self- and Bus-Bus-powered USB Hub Controller |
| 中文描述： | UNIVERSAL SERIAL BUS CONTROLLER, PDSO32 |
| 封裝： | 0.440 INCH, PLASTIC, SOIC-32 |
| 文件頁數(shù)： | 9/28頁 |
| 文件大?。?/td> | 211K |
| 代理商： | AT43312A-SC |
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9
AT43312A
1255G–USB–05/06
Figure 3.
Bus Powered Hub Power Supply
Port Status Pin
The STATx pins are signals that is not required by the USB specification. Its function is
to allow the hub to provide feedback to the user whenever a device is properly con-
nected to the port. An LED and series resistor connected to STATx can be used to
provide a visual feedback. If an overcurrent condition is detected at a port, the STATx of
the offending port will alternately turn on and off causing an LED to blink. The LED will
continue to blink until power to the offending port is turned off by the host or until the hub
is re-enumerated.
The default state of STATx is inactive. After a port is enabled AT43312A will assert the
port’s STATx. Any condition that causes the port to be disabled inactivates STATx.
Note:
The I/O Pins of the AT43312A should not be directly connected to voltages less than
VSS or more than the voltage at the CEXT pins. If it is necessary to violate this rule,
insert a series resistor between the I/O pin and the source of the external signal source
that limits the current into the I/O pin to less than 2 mA. Under no circumstances should
the external voltage exceed 5.5V. To do so will put the chip under excessive stress.
Hub Controller
The Hub Controller of the AT43312A provides the mechanism for the Host to enumerate
the Hub and the AT43312A to provide the Host with its configuration information. It also
provides a mechanism for the Host to monitor and control the downstream ports. Power
is applied, on a per port basis, by the Hub Controller upon receiving a command, Set-
PortFeature[PORT_POWER], from the Host. The AT43312A must be configured first by
the Host before the Hub Controller can apply power to external devices.
The Hub Controller contains two endpoints, Endpoint0 and Endpoint1 and maintains a
status register, Controller Status Register, which reflects the AT43312A’s current set-
tings. At power up, all bits in this register will be set to 0’s.
GND
PORT POWER
SWITCH
IN
OUT
F
C
To
Downstream
Device
G
V
AT43312A
P
O
LPSTAT
U2
U1
BUS_POWER
GND
相關PDF資料 |
PDF描述 |
|---|---|
| AT43312A-SU | Self- and Bus-Bus-powered USB Hub Controller |
| AT43312A | Self- and Bus-powered USB Hub Controller(自供電和總線供電USB集線器控制器) |
| AT43312 | Self- and Bus- Powered USB Hub Controller |
| AT43320 | Full-speed USB Hub/Function Microcontroller |
| AT43DK301 | Low-Cost USB Hub Development Kit |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| AT43312A-SU | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:Self- and Bus-Bus-powered USB Hub Controller |
| AT43320 | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:Full-speed USB Hub/Function Microcontroller |
| AT43320-AC | 功能描述:IC USB HUB CTRLR TO AVR 100-LQFP RoHS:否 類別:集成電路 (IC) >> 接口 - 控制器 系列:- 標準包裝:4,900 系列:- 控制器類型:USB 2.0 控制器 接口:串行 電源電壓:3 V ~ 3.6 V 電流 - 電源:135mA 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:36-VFQFN 裸露焊盤 供應商設備封裝:36-QFN（6x6） 包裝:* 其它名稱:Q6396337A |
| AT433A | 功能描述:旋鈕和轉盤 BLK KNOB FOR MR RoHS:否 制造商:Davies Molding 材料:Phenolic 設計:Set Screw 軸尺寸:0.25 in 直徑:3/4 in 顏色:Black 指示器型式:Line |
| AT433A-RO | 制造商:NKK Switches 功能描述:KNOB Actuator For the DRA Series |
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