AT43USB325E-AU Atmel, AT43USB325E-AU Datasheet - Page 87

• 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

8.4.4.2
3355C–USB–4/05
Overcurrent Detect Register – UOVCER
• Bit 2 – PSSTAT: Port Suspend Status
0 = Port not suspended
1 = Port suspended
Set and cleared by the hardware as controlled through Port Control Register.
• Bit 1 – PESTAT: Port Enable Status
0 = Port is disabled
1 = Port is enabled
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.
• Bit 7..3 – Reserved
These bits are reserved in the AT43USB325 and will read as zero.
• Bit 2 – OVC 2
Setting this bit enables the hub to detect an overcurrent on a port while the hub is in the suspend
state. The overcurrent condition is signalled by a 1 to 0 transition at PD0.
• Bit 1, 0 – Reserved
These bits are reserved in the AT43USB325 and will read as zero.
Initial Value
Read/Write
$1FF2
Bit
R
7
–
0
R
6
–
0
R
5
–
0
R
4
–
0
R
3
–
0
OVC2
R/W
2
0
AT43USB325
R
1
–
0
R
0
–
0
UOVCER
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