at43usb355 ATMEL Corporation, at43usb355 Datasheet - Page 96
![no-image](/images/manufacturer_photos/0/0/79/atmel_corporation_sml.jpg)
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)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
96
AT43USB355
Set and cleared by the hardware as controlled through Port Control register.
• Bit 0 – PCSTAT: Port Connect Status
0 = No device on this port
1 = Device present on this port
Set to 1 for Port 1. Set and cleared by the hardware after sampling of connect status at EOF2.
Overcurrent Detect Register – UOVCER
• Bit 7..4 – Reserved
These bits are reserved in the AT43USB355 and will read as zero.
• Bit 3 – OVC3
Setting this bit enables the hub to detect an overcurrent on Port 3 while the hub is in the sus-
pend state. The overcurrent condition must be signaled by a 1 to 0 transition at PD1.
• Bit 2 – OVC2
Setting this bit enables the hub to detect an overcurrent on Port 2 while the hub is in the sus-
pend state. The overcurrent condition must be signaled by a 1 to 0 transition at PD0.
• Bit 1, 0 – Reserved
These bits are reserved in the AT43USB355 and will read as zero.
Hub Port State Register – HPSTAT2, 3
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 AT43USB355 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.
Initial Value
Read/Write
Port2 $1FA9
Port3 $1FAA
Read/Write
Initial Value
$1FF2
Bit
Bit
R
7
–
0
R
7
–
–
0
R
6
–
–
0
R
6
–
0
R
5
–
–
0
R
5
–
0
R
4
–
–
0
4
–
R
0
R
3
–
–
0
OVC3
R
3
0
R
2
–
–
0
OVC2
R/W
2
0
DPSTATE
DPSTATE
R
1
0
R
1
–
0
DMSTATE
DMSTATE
0
R
0
R
0
–
0
2603G–USB–04/06
PSTATE2
PSTATE3
UOVCER