AT32UC3L-EK Atmel, AT32UC3L-EK Datasheet - Page 140

• Manufacturer Part Number: AT32UC3L-EK
• Description: KIT EVAL AVR32 UC3 MCU
• Manufacturer: Atmel
• Type: MCUr

Specifications of AT32UC3L-EK

• Contents: *
• Silicon Manufacturer: Atmel
• Core Architecture: AVR
• Core Sub-architecture: UC3L
• Kit Contents: Board
• Features: USB / Battery Powered, Board Controller / Bootloader
• Svhc: No SVHC (15-Dec-2010)
• Rohs Compliant: Yes
• Tool Type: Starter Kit
• Cpu Core: AVR 8
• Data Bus Width: 8 bit
• Processor Series: AT32
• Processor To Be Evaluated: AT32UC3L064
• Interface Type: USB, Capacitive Touch
• For Use With/related Products: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

11.4
11.4.1
11.4.2
11.4.3
11.5
32099F–11/2010
Product Dependencies
Functional Description
Power Management
Clocks
Debug Operation
Figure 11-1. INTC Block Diagram
In order to use this module, other parts of the system must be configured correctly, as described
below.
If the CPU enters a sleep mode that disables CLK_SYNC, the INTC will stop functioning and
resume operation after the system wakes up from sleep mode.
The clock for the INTC bus interface (CLK_INTC) is generated by the Power Manager. This
clock is enabled at reset, and can be disabled in the Power Manager.
The INTC sampling logic runs on a clock which is stopped in any of the sleep modes where the
system RC oscillator is not running. This clock is referred to as CLK_SYNC. This clock is
enabled at reset, and only turned off in sleep modes where the system RC oscillator is stopped.
When an external debugger forces the CPU into debug mode, the INTC continues normal
operation.
All of the incoming interrupt requests (IREQs) are sampled into the corresponding Interrupt
Request Register (IRR). The IRRs must be accessed to identify which IREQ within a group that
is active. If several IREQs within the same group are active, the interrupt service routine must
prioritize between them. All of the input lines in each group are logically ORed together to form
the GrpReqN lines, indicating if there is a pending interrupt in the corresponding group.
The Request Masking hardware maps each of the GrpReq lines to a priority level from INT0 to
INT3 by associating each group with the Interrupt Level (INTLEVEL) field in the corresponding
NMIREQ
IREQ63
IREQ34
IREQ33
IREQ32
IREQ31
IREQ2
IREQ1
IREQ0
IRR Registers
Interrupt Controller
OR
OR
OR
IRRn
IRR1
IRR0
GrpReq1
GrpReq0
GrpReqN
.
.
.
Request
Masking
ValReqN
ValReq1
ValReq0
IPRn
IPR1
IPR0
.
.
.
IPR Registers
INT_level,
INT_level,
INT_level,
offset
offset
offset
AT32UC3L016/32/64
.
.
.
ICR Registers
AUTOVECTOR
INTLEVEL
Masks
CPU
I[3-0]M
SREG
Masks
GM
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