AT32UC3B0512-A2UT Atmel, AT32UC3B0512-A2UT Datasheet - Page 89

• Manufacturer Part Number: AT32UC3B0512-A2UT
• Description: IC MCU AVR32 512K FLASH 64TQFP
• Manufacturer: Atmel
• Series: AVR®32 UC3r

Specifications of AT32UC3B0512-A2UT

• Core Processor: AVR
• Core Size: 32-Bit
• Speed: 60MHz
• Connectivity: I²C, IrDA, SPI, SSC, UART/USART, USB
• Peripherals: Brown-out Detect/Reset, DMA, POR, PWM, WDT
• Number Of I /o: 44
• Program Memory Size: 512KB (512K x 8)
• Program Memory Type: FLASH
• Ram Size: 96K x 8
• Voltage - Supply (vcc/vdd): 1.65 V ~ 1.95 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-TQFP, 64-VQFP
• Controller Family/series: AT32UC3B
• No. Of I/o's: 44
• Ram Memory Size: 96KB
• Cpu Speed: 60MHz
• No. Of Timers: 1
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

12.4
12.4.1
12.4.2
12.4.3
12.5
32059K–03/2011
Product Dependencies
Functional Description
Power Management
Clocks
Debug Operation
Figure 12-1. 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
.
.
.
ICR Registers
AUTOVECTOR
AT32UC3B
INTLEVEL
Masks
CPU
I[3-0]M
Masks
SREG
GM
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