Datasheet

1076
32117D–AVR-01/12
AT32UC3C
35.4 I/O Lines Description
35.5 Product Dependencies
35.5.1 I/O Lines
The pins used for interfacing the ACIFA may be multiplexed with the I/O Controller lines. The
programmer must first program the I/O Controller to assign the desired ACIFA pins to their
peripheral function. If I/O lines of the ACIFA are not used by the application, they can be used for
other purposes by the I/O Controller.
35.5.2 Power Management
When the ACIFA is enabled it will remain clocked as long as its selected clock source is running.
It can also wake the CPU from the currently active sleep mode. Refer to the Power Manager
chapter for details on the different sleep modes.
35.5.3 Clocks
The clock for the ACIFA bus interface (CLK_ACIFA) is generated by the Power Manager. this
clock is turned on by default, and can be enabled and disabled in the Power Manager.
35.5.4 Interrupts
The ACIFA interrupt request lines are connected to the interrupt controller. Using the ACIFA
interrupts requires the Interrupt Controller to be programmed first.
35.5.5 Peripheral Events
The ACIFA peripheral events are connected via the Peripheral Event System. Refer to the
Peripheral Event System chapter for details.
35.5.6 Debug Operation
The ACIFA is frozen during debug operation, unless the Run In Debug bit in the Development
Control Register is set and the bit corresponding to the ACIFA is set in the Peripheral Debug
Register (PDBG). Please refer to the On-Chip Debug chapter in the AVR32UC Technical Refer-
ence Manual, and the OCD Module Configuration section, for details.
35.6 Functional Description
35.6.1 Normal mode
In normal mode, both analog comparators are independent.
Table 35-1. I/O Lines Description
Name Description
ACAOUT Analog Comparator A output
ACBOUT Analog Comparator B output
ACxAPi Positive inputs for comparator ACxA
ACxANi Negative inputs for comparator ACxA
ACxBPi Positive inputs for comparator ACxB
ACxBNi Negative inputs for comparator ACxB