參數(shù)資料
型號(hào)： AT43USB325E-AU
廠商： ATMEL CORP
元件分類： 微控制器/微處理器
英文描述： Multimedia USB Keyboard Controller with Embedded Hub
中文描述： 8-BIT, 12 MHz, RISC MICROCONTROLLER, PQFP64
封裝： 1.40 MM HEIGHT, GREEN, PLASTIC, MS-026ACB, LQFP-64
文件頁(yè)數(shù)： 85/109頁(yè)
文件大小： 643K
代理商： AT43USB325E-AU
85
3355C–USB–4/05
AT43USB325
These bits define which port is being addressed for the command defined by bits [2:0].
8.4.3
Selective Suspend and Resume
The host can selectively suspend and resume a port through the Set Port Feature
(PORT_SUSPEND) and Clear Port Feature (PORT_SUSPEND).
A port enters the suspend state after the microcontroller interprets the suspend request and sets
the appropriate bits of the Hub Port Control Register, HPCON. From this point on he hub
repeater hardware is responsible for proper actions in placing Ports 2:5 in the suspend mode.
For Port 1, the embedded function port, the hardware will stop responding to any normal bus
traffic, but the microcontroller firmware must place all external circuitry associated with the func-
tion in the low-power state.
A port exits from the suspend state when the hub receives a Clear Port Feature
(PORT_SUSPEND) or Set Port Feature (PORT_RESET). If the Clear Port Feature
(PORT_SUSPEND) is directed towards Ports 2:5, the USB hardware drives a “K” downstream
for at least 20 ms followed by a low speed EOP. It then places the port in the enabled state. A
Clear Port Feature (PORT_SUSPEND) to Port 1 (the embedded function) causes the firmware
to wait 20 ms, take the embedded function out of the suspended state and then enable the port.
The ports can also exit from the suspended state through a remote wakeup if this feature is
enabled. For Ports 2:5, this means detection of a connect/disconnect or an upstream directed J
to K signaling. Remote wakeup for the embedded function is initiated through a key depression
which triggers a KB INT.
Bit2
Bit1
Bit0
Port addresses
1
0
1
Port5
1
0
0
Port4
0
1
1
Port3
0
1
0
Port2
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AT43USB326 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:Missed Watchdog Timer Reset
AT43USB326_06 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:Multimedia USB Keyboard Controller with Embedded Hub
AT43USB326-AC 功能描述:USB 接口集成電路 USB KEYBOARD F/LOGI- TECH - COM TEMP RoHS:否 制造商:Cypress Semiconductor 產(chǎn)品:USB 2.0 數(shù)據(jù)速率: 接口類型:SPI 工作電源電壓:3.15 V to 3.45 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WLCSP-20
AT43USB326-AU 功能描述:USB 接口集成電路 USB KEYBOARD FOR LOGITECH - IND TEMP RoHS:否 制造商:Cypress Semiconductor 產(chǎn)品:USB 2.0 數(shù)據(jù)速率: 接口類型:SPI 工作電源電壓:3.15 V to 3.45 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WLCSP-20
AT43USB351M 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:Missed Watchdog Timer Reset
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