SAM3S2A Atmel Corporation, SAM3S2A Datasheet - Page 132
SAM3S2A
Manufacturer Part Number
SAM3S2A
Description
Manufacturer
Atmel Corporation
Specifications of SAM3S2A
Flash (kbytes)
128 Kbytes
Pin Count
48
Max. Operating Frequency
64 MHz
Cpu
Cortex-M3
# Of Touch Channels
17
Hardware Qtouch Acquisition
No
Max I/o Pins
47
Ext Interrupts
47
Usb Transceiver
1
Quadrature Decoder Channels
1
Usb Speed
Full Speed
Usb Interface
Device
Spi
2
Twi (i2c)
2
Uart
3
Ssc
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
8
Adc Resolution (bits)
12
Adc Speed (ksps)
1000
Analog Comparators
1
Resistive Touch Screen
No
Temp. Sensor
Yes
Crypto Engine
No
Sram (kbytes)
32
Self Program Memory
YES
Dram Memory
No
Nand Interface
Yes
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
Yes / No
Timers
3
Output Compare Channels
3
Input Capture Channels
3
Pwm Channels
4
32khz Rtc
Yes
Calibrated Rc Oscillator
Yes
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10.17.2
10.17.2.1
10.17.2.2
10.17.2.3
10.17.2.4
10.17.2.5
132
CBZ
CBNZ
SAM3S
CBZ and CBNZ
Syntax
Operation
Restrictions
Condition flags
Examples
R5, target ; Forward branch if R5 is zero
R0, target ; Forward branch if R0 is not zero
Compare and Branch on Zero, Compare and Branch on Non-Zero.
where:
Rn
label
Use the CBZ or CBNZ instructions to avoid changing the condition code flags and to reduce the
number of instructions.
CBZ Rn, label does not change condition flags but is otherwise equivalent to:
CBNZ Rn, label does not change condition flags but is otherwise equivalent to:
The restrictions are:
These instructions do not change the flags.
• Rn must be in the range of R0 to R7
• the branch destination must be within 4 to 130 bytes after the instruction
• these instructions must not be used inside an IT block.
CBZ Rn, label
CBNZ Rn, label
CMP
BEQ
CMP
BNE
is the register holding the operand.
is the branch destination.
Rn, #0
label
Rn, #0
label
6500C–ATARM–8-Feb-11
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