參數(shù)資料
型號： 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
文件頁數(shù)： 71/109頁
文件大?。?/td> 643K
代理商： AT43USB325E-AU
71
3355C–USB–4/05
AT43USB325
8.2
USB Registers
The following sections describe the registers of the AT43USB325’s USB hub and function units.
Reading a bit for which the microcontroller does not have read access will yield a zero value
result. Writing to a bit for which the microcontroller does not have write access has no effect.
8.2.1
Hub Address Register – HADDR
The USB hub contains an address register that contains the hub address assigned by the host.
This Hub Address Register must be programmed by the microcontroller once it has received a
SET_ADDRESS request from the host. The USB hardware uses the new address only after the
status phase of the transaction is completed when the microcontroller has enabled the new
address by setting bit 0 of the Global State Register. After power-up or reset, this register will
contain the value of 0x00.
8.2.1.1
Hub Address Register – HADDR
Bit 7 – SAEN: Single Address Enable
The Single Address Enable bit allows the microcontroller to configure the AT43USB325 into a
single address or a composite device. Once this capability is enabled, the hub endpoint 0
(HEP0) is converted from a control endpoint to a programmable function endpoint FEP3; all the
endpoints would then operate on the single address.
Bit 6..0 – HADD6...0: Hub Address[6:0]
8.2.2
Function Address Register
–
FADDR
The USB function contains an address register that contains the function address assigned by
the host. This Function Address Register must be programmed by the microcontroller once it
has received a SET_ADDRESS request from the host and completed the status phase of the
transaction. After power up or reset, this register will contain the value of 0x00.
8.2.2.1
Function Address Register – FADDR
Bit 7 – FEN: Function Enable
The Function Enable bit (FEN) allows the firmware to enable or disable the function endpoints.
The firmware will set this bit after receipt of a reset through the hub, SetPortFea-
ture[PORT_RESET]. Once this bit is set, the USB hardware passes to and from the host.
When the Single Address bit is set, the condition of FEN is ignored.
Bit 6..0 – FADD6...0: Function Address[6:0]
Bit
7
6
5
4
3
2
1
0
$1FEF
SAEN
HADD6
HADD5
HADD4
HADD3
HADD2
HADD1
HADD0
HADDR
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Initial Value
0
0
0
0
0
0
0
0
Bit
7
6
5
4
3
2
1
0
$1FEE
FEN
FADD6
FADD5
FADD4
FADD3
FADD2
FADD1
FADD0
FADDR
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Initial Value
0
0
0
0
0
0
0
0
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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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