AT43USB355M-AC ATMEL [ATMEL Corporation], AT43USB355M-AC Datasheet - Page 96

• Manufacturer Part Number: AT43USB355M-AC
• Description: Full-speed USB Microcontroller with Embedded Hub, ADC and PWM
• Manufacturer: ATMEL [ATMEL Corporation]

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