AT43USB325E-AU Atmel, AT43USB325E-AU Datasheet - Page 39

• 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

4.13.8
3355C–USB–4/05
INTA/B/C/D Interrupt Sense Control Register – ISCR
• Bit 7,6 – ISC71, ISC70: External Interrupt D Sense Control Bits
ISC71 and ISC70 controls the level and sense of the input at the INTD pin as defined below:
• Bit 5,4 – ISC61, ISC60: External Interrupt C Sense Control Bits
ISC71 and ISC70 controls the level and sense of the input at the INTC pin as defined below:
• Bit 3,2 – ISC51, ISC40: External Interrupt B Sense Control Bits
ISC51 and ISC50 controls the level and sense of the input at the INTB pin as defined below:
• Bit 1,0 – ISC41, ISC40: External Interrupt A Sense Control Bits
ISC41 and ISC40 controls the level and sense of the input at the INTA pin as defined below:
Initial Value
Read/Write
$1FF1
Bit
ISC71 ISC70 Description
0
0
1
1
ISC61 ISC60 Description
0
0
1
1
ISC51 ISC50 Description
0
0
1
1
ISC41 ISC40 Description
0
0
1
1
ISC71
R/W
7
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
ISC70
R/W
6
0
Low level of INTD
Reserved
Falling edge of INTD
Rising edge of INTD
Low level of INTC
Reserved
Falling edge of INTC
Rising edge of INTC
Low level of INTB
Reserved
Falling edge of INTB
Rising edge of INTB
Low level of INTA
Reserved
Falling edge of INTA
Rising edge of INTA
ISC61
R/W
5
0
ISC60
R/W
0
4
ISC51
R/W
3
0
ISC50
R/W
2
0
ISC41
R/W
1
0
AT43USB325
ISC40
R/W
0
0
ISCR
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