18
FEATURES
CPU
• SAM87 CPU core
Memory
• 528-byte general purpose register area
• 16/32-Kbyte internal program memory
• ROM-less operating mode
External Interface
• 64-Kbyte external data memory area
• 64-Kbyte external program memory area
(ROM-less mode)
Instruction Set
• 79 instructions
• IDLE and STOP instructions added for power-
down modes
Instruction Execution Time
• 21 interrupt sources and 21 vectors
• Eight interrupt levels
• Fast interrupt processing
General I/O
• Seven I/O ports (total 56 pins)
• Seven bit-programmable ports
PWM and Capture
• Two 14-bit PWM output
• One capture
Serial I/O
• One synchronous serial I/O module
• Selectable transmit and receive rates
• Selectable baud rate for Rx and Tx respectively
Timer/Counters
• One 8-bit basic timer for watchdog function
• One 8-bit timer/counter with three operating
modes (timer 0)
• One 8-bit timer for the zero-cross detection
circuit
•Two 16-bit general-purpose timer/counters with
four operating modes (timer C and D)
UART
• One UART module
• Full duplex serial I/O interface with three UART
modes
A/D Converter
• Eight analog input pins
• 10-bit conversion resolution
• 20 µs conversion time (10 MHz CPU clock)
Zero Cross Detection Circuit
• Zero cross detection circuit that generates a
digital signal in synchronization with an AC
signal input
Buzzer Frequency Output
• 200 Hz to 20 kHz signal can be generated
Oscillator Frequency
• 1 MHz to 12 MHz external crystal oscillator
• Maximum 12 MHz CPU clock
Operating Temperature Range
• –40°C to +85°C
Operating Voltage Range
• 2.7V to 5.5V
Package Type
• 64-pin SDIP, 64-pin QFP
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