AT43USB326-AU Atmel, AT43USB326-AU Datasheet - Page 69

• Manufacturer Part Number: AT43USB326-AU
• Description: IC USB KEYBOARD CTRLR 48LQFP
• Manufacturer: Atmel
• Series: AVR®r

Specifications of AT43USB326-AU

• Applications: Keyboard Controller
• Core Processor: AVR
• Program Memory Type: Mask ROM (16 kB)
• Controller Series: AT43USB
• Ram Size: 512 x 8
• Interface: USB
• Number Of I /o: 32
• Voltage - Supply: 4.4 V ~ 5.25 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 48-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

3313D–USB–04/06
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..3 – Reserved
These bits are reserved in the AT43USB326 and will read as zero.
• Bit 2 – PORT 2
Setting this bit enables the hub to detect an overcurrent on Port 2 while the hub is in the sus-
pend state.
• Bit 1, 0 – Reserved
These bits are reserved in the AT43USB326 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 AT43USB326 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
R
4
–
0
R
3
–
–
0
R
3
–
0
R
2
–
–
0
PORT2
R/W
2
0
DPSTATE
DPSTATE
R
1
0
AT43USB326
R
1
–
0
DMSTATE
DMSTATE
0
R
0
R
0
–
0
PSTATE2
PSTATE3
UOVCER
69