AT43USB325E-AU Atmel, AT43USB325E-AU Datasheet - Page 33

• 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

4.13.2
3355C–USB–4/05
USB Interrupt Mask Register – UIMSKR
• Bit 7 – SOF IMSK: Enable Start of Frame Interrupt Mask
When the SOF IMSK bit is set (1), the Start of Frame Interrupt is masked.
• Bit 6 – EOF2 IMSK: Enable EOF2 Interrupt
When the EOF2 IMSK bit is set (1), the EOF2 Interrupt is masked.
• Bit 5 – Res: Reserved Bit
This bit is reserved and always read as zero.
• Bit 4 – FEP3 IMSK: Function End-point 3 Interrupt Mask
When the FE3 IMSK bit is set (1), the Function End-point 3 Interrupt is masked.
• Bit 3 – HEP0 IMSK: Enable Endpoint 0 Interrupt
When the HEP0 IMSK bit is set (1), the Hub Endpoint 0 Interrupt is masked.
• Bit 2 – FEP2 IMSK: Enable Endpoint 2 Interrupt
When the FE2 IMSK bit is set (1), the Function Endpoint 2 Interrupt is masked.
• Bit 1 – FEP1 IMSK: Enable Endpoint 1 Interrupt
When the FE1 IMSK bit is set (1), the Function Endpoint 1 Interrupt is masked.
• Bit 0 – FEP0 IMSK: Enable Endpoint 0 Interrupt
When the FE0 IMSK bit is set (1), the Function Endpoint 0 Interrupt is masked.
Initial Value
Read/Write
$1FF6
Bit
SOF IMSK
R/W
7
0
EOF2 IMSK
R/W
6
0
R
5
–
0
FEP3 IMSK
R/W
4
0
HEP0 IMSK
R/W
3
0
FEP2 IMSK
R/W
2
0
FEP1 IMSK
R/W
1
0
AT43USB325
FEP0 IMSK
R/W
0
0
UIMSKR
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