Atmel AVR XMEGA AU series Manual page 158

8331B–AVR–03/12
Table 13-5. Output/pull configuration.
OPC[2:0] Group Configuration
000 TOTEM
001 BUSKEEPER
010 PULLDOWN
011 PULLUP
100 WIREDOR
101 WIREDAND
110 WIREDORPULL
111 WIREDANDPULL
• Bit 2:0 – ISC[2:0]: Input/Sense Configuration
These bits set the input and sense configuration on pin n according to
configuration decides how the pin can trigger port interrupts and events. If the input buffer is not
disabled, the input cannot be read in the IN register.
Table 13-6. Input/sense configuration.
ISC[2:0] Group Configuration
000 BOTHEDGES
001 RISING
010 FALLING
011 LEVEL
100
101
110
111 INTPUT_DISABLE
Note: 1. A low-level pin value will not generate events, and a high-level pin value will continuously gen-
erate events.
2. Only PORTA - PORTF support the input buffer disable option. If the pin is used for analog func-
tionality, such as AC or ADC, it is recommended to configure the pin to INPUT_DISABLE.
Atmel AVR XMEGA AU
Description
Output Configuration
Totem-pole
Totem-pole
Totem-pole
Totem-pole
Wired-OR
Wired-AND
Wired-OR
Wired-AND
Description
Sense both edges
Sense rising edge
Sense falling edge
(1)
Sense low level
Reserved
Reserved
Reserved
Digital input buffer disabled
Pull Configuration
(N/A)
Bus-keeper
Pull-down (on input)
Pull-up (on input)
(N/A)
(N/A)
Pull-down
Pull-up
Table 13-6. The sense
(2)
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