AT32UC3C2512C Automotive Atmel Corporation, AT32UC3C2512C Automotive Datasheet - Page 1074

• Manufacturer Part Number: AT32UC3C2512C Automotive
• Manufacturer: Atmel Corporation

35.4
35.4.1
35.4.2
35.4.3
35.4.4
35.4.5
35.5
35.5.1
35.5.1.1
9166C–AVR-08/11
Product Dependencies
Functional Description
Power Management
Clocks
Interrupts
Peripheral Events
Debug Operation
Normal mode
ACIFA Output
In order to use this module, other parts of the system must be configured correctly, as described
below.
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.
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.
The ACIFA interrupt request lines are connected to the interrupt controller. Using the ACIFA
interrupts requires the Interrupt Controller to be programmed first.
The ACIFA peripheral events are connected via the Peripheral Event System. Refer to the
Peripheral Event System chapter for details.
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.
In normal mode, both analog comparators are independent.
An analog comparator generates one output acout[i] (with i = a or b) according to the input volt-
ages vip
The ACIFA generates two independent events according to the configuration of the Event
Source Selection field in the Event Configuration register (EVSRC0.EVSRC and
EVSRC1.EVSRC):
• acout[i] = 1 if vip
• acout[i] = 0 if vip
• acout[i] = 0 if the AC output is not available (ie. The AC Ready bit in the Status Register
• as soon as vipA > vinA or
• as soon as vipA < vinA or
• as soon as vipB > vinB or
(SR.ACRDYi) is still zero)
i
(AC positive input) and vin
i
i
> vin
< vin
i
i
i
(AC negative input):
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