at91cap7e ATMEL Corporation, at91cap7e Datasheet - Page 28

• Manufacturer Part Number: at91cap7e
• Description: Customizable Microcontroller
• Manufacturer: ATMEL Corporation

9.10
9.11
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General-Purpose Backed-up Registers
Backup Power Switch
Advanced Interrupt Controller
Debug Unit
AT91CAP7E
• Twenty 32-bit backup general-purpose registers
• Automatic switch of VDDBU to VDDCORE guaranteeing very low power consumption on
• Controls the interrupt lines (nIRQ and nFIQ) of the ARM Processor
• Thirty-two individually maskable and vectored interrupt sources
• Two External Sources plus the Fast Interrupt signal
• 8-level Priority Controller
• Vectoring
• Protect Mode
• Fast Forcing
• Composed of two functions
• Two-pin UART
VDDBU while VDDCORE is present
– Source 0 is reserved for the Fast Interrupt Input (FIQ)
– Source 1 is reserved for system peripherals (PIT, RTT, PMC, DBGU, etc.)
– Programmable Edge-triggered or Level-sensitive Internal Sources
– Programmable Positive/Negative Edge-triggered or High/Low Level-sensitive
– Drives the Normal Interrupt of the processor
– Handles priority of the interrupt sources 1 to 31
– Higher priority interrupts can be served during service of lower priority interrupt
– Optimizes Interrupt Service Routine Branch and Execution
– One 32-bit Vector Register per interrupt source
– Interrupt Vector Register reads the corresponding current Interrupt Vector
– Easy debugging by preventing automatic operations when protect models are
– Permits redirecting any normal interrupt source on the Fast Interrupt of the
– Two-pin UART
– Debug Communication Channel (DCC) support
– Implemented features are 100% compatible with the standard Atmel USART
– Independent receiver and transmitter with a common programmable Baud Rate
– Even, Odd, Mark or Space Parity Generation
– Parity, Framing and Overrun Error Detection
– Automatic Echo, Local Loopback and Remote Loopback Channel Modes
– Support for two PDC channels with connection to receiver and transmitter
enabled
processor
Generator
8549A–CAP–10/08