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SAM7X256_14 Datasheet, PDF (28/662 Pages) ATMEL Corporation – ARM-based Flash MCU | |||
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ï¬ Protect Mode
ï¬ Easy debugging by preventing automatic operations
ï¬ Fast Forcing
ï¬ Permits redirecting any interrupt source on the fast interrupt
ï¬ General Interrupt Mask
ï¬ Provides processor synchronization on events without triggering an interrupt
9.5 Debug Unit
ï¬ Comprises:
ï¬ One two-pin UART
ï¬ One Interface for the Debug Communication Channel (DCC) support
ï¬ One set of Chip ID Registers
ï¬ One Interface providing ICE Access Prevention
ï¬ Two-pin UART
ï¬ USART-compatible User Interface
ï¬ Programmable Baud Rate Generator
ï¬ Parity, Framing and Overrun Error
ï¬ Automatic Echo, Local Loopback and Remote Loopback Channel Modes
ï¬ Debug Communication Channel Support
ï¬ Offers visibility of COMMRX and COMMTX signals from the ARM Processor
ï¬ Chip ID Registers
ï¬ Identification of the device revision, sizes of the embedded memories, set of peripherals
ï¬ Chip ID is 0x275C 0A40 (MRL A) for SAM7X512
ï¬ Chip ID is 0x275B 0940 (MRL A or B) for SAM7X256
ï¬ Chip ID is 0x275B 0942 (MRL C) for SAM7X256
ï¬ Chip ID is 0x275A 0740 (MRL A or B) for SAM7X128
ï¬ Chip ID is 0x275A 0742 (MRL C) for SAM7X128
9.6 Periodic Interval Timer
ï¬ 20-bit programmable counter plus 12-bit interval counter
9.7 Watchdog Timer
ï¬ 12-bit key-protected Programmable Counter running on prescaled SLCK
ï¬ Provides reset or interrupt signals to the system
ï¬ Counter may be stopped while the processor is in debug state or in idle mode
9.8 Real-time Timer
ï¬ 32-bit free-running counter with alarm running on prescaled SLCK
ï¬ Programmable 16-bit prescaler for SLCK accuracy compensation
9.9 PIO Controllers
ï¬ Two PIO Controllers, each controlling 31 I/O lines
ï¬ Fully programmable through set/clear registers
ï¬ Multiplexing of two peripheral functions per I/O line
ï¬ For each I/O line (whether assigned to a peripheral or used as general-purpose I/O)
ï¬ Input change interrupt
SAM7X Series [DATASHEET] 28
6120KâATARMâ11-Feb-14
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