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AT43USB325 bảng dữ liệu(PDF) 88 Page - ATMEL Corporation

tên linh kiện AT43USB325
Giải thích chi tiết về linh kiện  Multimedia USB Keyboard Controller with Embedded Hub
PDF  109 Pages
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nhà sản xuất  ATMEL [ATMEL Corporation]
Trang chủ  http://www.atmel.com
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AT43USB325 bảng dữ liệu(HTML) 88 Page - ATMEL Corporation

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88
3355C–USB–4/05
AT43USB325
8.4.4.3
Hub Port State Register – HPSTAT2...5
These registers contain the state of the ports’ DP and DM pins, which will be sent to the host
upon receipt of a GetBusState request.
• Bit 7..2 – Reserved
These bits are reserved in the AT43USB325 and will read as zero.
•Bit 1 – DPSTATE: DPlus State
Value of DP at last EOF. Set and cleared by hardware at EOF2.
Set to 1 for Port 1.
•Bit 0 – DMSTATE: DMinus State
Value of DM at last EOF. Set and cleared by hardware at EOF2.
Set to 0 for Port 1.
8.4.4.4
Hub Port Status Change Register – PSCR1..5
The microcontroller firmware uses the bits in this register to monitor when a port status change
has occurred, which then gets reported to the host through the Port Change Field wPortChange.
Except for bit 3, the Port Overcurrent Indicator Change, the bits in this register are set by the
USB hardware. Otherwise, the firmware should only clear these bits.
• Bit 7..5 – Reserved
These bits are reserved in the AT43USB325 and will read as zero.
• Bit 4 – RSTSC: Port Reset Status Change
0 = No change
Bit
7
6
5
4
3
2
1
0
Port2 $1FA9
–
–
–
–
–
–
DPSTATE
DMSTATE
PSTATE2
Port3 $1FAA
–
–
–
–
–
–
DPSTATE
DMSTATE
PSTATE3
Port4 $1FAB
–
–
–
–
–
–
DPSTATE
DMSTATE
PSTATE4
Port5 $1FAC
–
–
–
–
–
–
DPSTATE
DMSTATE
PSTATE5
Read/Write
R
R
R
R
R
R
R
R
Initial Value
0
0
0
0
0
0
0
0
Bit
7
6
5
4
3
2
1
0
Port1 $1FB0
–
–
–
RSTSC
POCIC
PSSC
PESC
PCSC
PSCR1
Port2 $1FB1
–
–
–
RSTSC
POCIC
PSSC
PESC
PCSC
PSCR2
Port3 $1FB2
–
–
–
RSTSC
POCIC
PSSC
PESC
PCSC
PSCR3
Port4 $1FB3
–
–
–
RSTSC
POCIC
PSSC
PESC
PCSC
PSCR4
Port5 $1FB4
–
–
–
RSTSC
POCIC
PSSC
PESC
PCSC
PSCR5
Read/Write
R
R
R
R
R
R
R
R
Initial Value
0
0
0
0
0
0
0
0



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