AT43USB325E-AC Atmel, AT43USB325E-AC Datasheet - Page 39
AT43USB325E-AC
Manufacturer Part Number
AT43USB325E-AC
Description
IC USB KEYBOARD CTRLR HUB 64LQFP
Manufacturer
Atmel
Series
AVR®r
Datasheet
1.AT43USB325E-AC.pdf
(109 pages)
Specifications of AT43USB325E-AC
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
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
64-LQFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
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Part Number
Manufacturer
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Price
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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
39
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