SAM3N4C Atmel Corporation, SAM3N4C Datasheet - Page 101

• Manufacturer Part Number: SAM3N4C
• Manufacturer: Atmel Corporation

Specifications of SAM3N4C

• Flash (kbytes): 256 Kbytes
• Pin Count: 100
• Max. Operating Frequency: 48 MHz
• Cpu: Cortex-M3
• # Of Touch Channels: 32
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 79
• Ext Interrupts: 79
• Quadrature Decoder Channels: 2
• Usb Speed: No
• Usb Interface: No
• Spi: 3
• Twi (i2c): 2
• Uart: 4
• Ssc: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 16
• Adc Resolution (bits): 10
• Adc Speed (ksps): 384
• Resistive Touch Screen: No
• Dac Channels: 1
• Dac Resolution (bits): 10
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 24
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 1.8/3.3
• Operating Voltage (vcc): 1.62 to 3.6
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 6
• Output Compare Channels: 6
• Input Capture Channels: 6
• Pwm Channels: 4
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

10.12.8.4
10.12.8.5
11011A–ATARM–04-Oct-10
try
MOV
LDREX
CMP
ITT
STREXEQ R0, R1, [LockAddr]
CMPEQ
BNE
....
Condition flags
Examples
R1, #0x1
R0, [LockAddr]
R0, #0
EQ
R0, #0
try
These instructions do not change the flags.
; Initialize the ‘lock taken’ value
; Load the lock value
; Is the lock free?
; IT instruction for STREXEQ and CMPEQ
; Try and claim the lock
; Did this succeed?
; No – try again
; Yes – we have the lock
SAM3N
101