AT43USB325E-AU Atmel, AT43USB325E-AU Datasheet - Page 88

• Manufacturer Part Number: AT43USB325E-AU
• Description: IC USB KEYBOARD CTRLR 64LQFP
• Manufacturer: Atmel
• Series: AVR®r

Specifications of AT43USB325E-AU

• Applications: Keyboard Controller
• Core Processor: AVR
• Program Memory Type: SRAM (16 kB)
• Controller Series: AT43USB
• Ram Size: 512 x 8
• Interface: SPI, 3-Wire Serial
• Number Of I /o: 42
• Voltage - Supply: 4.4 V ~ 5.25 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 64-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

8.4.4.3
8.4.4.4
88
AT43USB325
Hub Port State Register – HPSTAT2...5
Hub Port Status Change Register – PSCR1..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.
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
Port1 $1FB0
Port2 $1FB1
Port3 $1FB2
Port4 $1FB3
Port5 $1FB4
Port2 $1FA9
Port3 $1FAA
Port4 $1FAB
Port5 $1FAC
Initial Value
Read/Write
Initial Value
Read/Write
Bit
Bit
R
7
–
–
–
–
0
R
7
–
–
–
–
–
0
R
6
–
–
–
–
0
R
6
–
–
–
–
–
0
R
5
–
–
–
–
0
R
5
–
–
–
–
–
0
R
4
–
–
–
–
0
RSTSC
RSTSC
RSTSC
RSTSC
RSTSC
R
4
0
R
3
–
–
–
–
0
POCIC
POCIC
POCIC
POCIC
POCIC
R
3
0
R
2
–
–
–
–
0
PSSC
PSSC
PSSC
PSSC
PSSC
R
2
0
DPSTATE
DPSTATE
DPSTATE
DPSTATE
1
R
0
PESC
PESC
PESC
PESC
PESC
R
1
0
DMSTATE
DMSTATE
DMSTATE
DMSTATE
R
0
0
PCSC
PCSC
PCSC
PCSC
PCSC
R
0
0
3355C–USB–4/05
PSTATE2
PSTATE3
PSTATE4
PSTATE5
PSCR1
PSCR2
PSCR3
PSCR4
PSCR5