at43usb355 ATMEL Corporation, at43usb355 Datasheet - Page 84
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at43usb355
Manufacturer Part Number
at43usb355
Description
At43usb355 Full-speed Usb Microcontroller With Embedded Hub, Adc And Pwm
Manufacturer
ATMEL Corporation
Datasheet
1.AT43USB355.pdf
(115 pages)
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84
AT43USB355
Hub End-point 0 Data Register – HDR0
Function End-point 0..3 Data Register – FDR0..3
This register is used to read data from or to write data to the Hub End-point 0 FIFO.
• Bit 7..0 – FDAT7..0: FIFO Data
Hub end-point 1 has a single byte data register instead of a FIFO. This data register contains
the hub and port status change bitmap. This data register is automatically updated by the USB
hardware and is not accessible by the firmware. The bits in this register when read by the host
will be:
• Bit 7...4 – Reserved
These bits are reserved in the AT43USB355 and will read as zero.
• Bit 3 – P3 SC: Port 3 Status Change
• Bit 2 – P2 SC: Port 2 Status Change
• Bit 1 – P1 SC: Port 1 Status Change
• Bit 0 – H SC: Hub Status Change
Initial Value
Read/Write
Initial Value
Read/Write
$1FD7
$1FD5
$1FD4
$1FD3
$1FD2
Bit
Bit
$
DATA7
DATA7
DATA7
DATA7
DATA7
R/W
R/W
7
–
0
7
0
DATA6
DATA6
DATA6
DATA6
DATA6
R/W
R/W
6
–
0
6
0
DATA5
DATA5
DATA5
DATA5
DATA5
R/W
R/W
5
–
0
5
0
DATA4
DATA4
DATA4
DATA4
DATA4
R/W
R/W
4
0
4
–
0
DATA3
DATA3
DATA3
DATA3
DATA3
P3 SC
R/W
R/W
3
0
3
0
DATA2
DATA2
DATA2
DATA2
DATA2
P2 SC
R/W
R/W
2
0
2
0
DATA1
DATA1
DATA1
DATA1
DATA1
P1 SC
R/W
R/W
1
0
1
0
DATA0
DATA0
DATA0
DATA0
DATA0
H SC
2603G–USB–04/06
R/W
R/W
0
0
0
0
HDR0
FDR0
FDR1
FDR2
FDR3
HDR1
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