SAM4S16C Atmel Corporation, SAM4S16C Datasheet - Page 87
SAM4S16C
Manufacturer Part Number
SAM4S16C
Description
Manufacturer
Atmel Corporation
Specifications of SAM4S16C
Flash (kbytes)
1024 Kbytes
Pin Count
100
# Of Touch Channels
32
Hardware Qtouch Acquisition
No
Max I/o Pins
79
Ext Interrupts
79
Usb Transceiver
1
Quadrature Decoder Channels
2
Usb Speed
Full Speed
Usb Interface
Device
Spi
3
Twi (i2c)
2
Uart
4
Ssc
1
Sd / Emmc
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
16
Adc Resolution (bits)
12
Adc Speed (ksps)
1000
Analog Comparators
1
Resistive Touch Screen
No
Dac Channels
2
Dac Resolution (bits)
12
Temp. Sensor
Yes
Crypto Engine
No
Sram (kbytes)
128
Self Program Memory
YES
External Bus Interface
1
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
6
Output Compare Channels
6
Input Capture Channels
6
Pwm Channels
4
32khz Rtc
Yes
Calibrated Rc Oscillator
Yes
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11.6.3.5
11100A–ATARM–28-Oct-11
11100A–ATARM–28-Oct-11
RRX
Address Alignment
Figure 11-10. ROR #3
Rotate right with extend moves the bits of the register Rm to the right by one bit. And it copies
the carry flag into bit[31] of the result. See
When the instruction is RRXS or when RRX is used in Operand2 with the instructions MOVS,
MVNS, ANDS, ORRS, ORNS, EORS, BICS, TEQ or TST, the carry flag is updated to bit[0] of
the register Rm.
Figure 11-11. RRX
An aligned access is an operation where a word-aligned address is used for a word, dual word,
or multiple word access, or where a halfword-aligned address is used for a halfword access.
Byte accesses are always aligned.
The Cortex-M4 processor supports unaligned access only for the following instructions:
All other load and store instructions generate a usage fault exception if they perform an
unaligned access, and therefore their accesses must be address-aligned. For more information
about usage faults, see
Unaligned accesses are usually slower than aligned accesses. In addition, some memory
regions might not support unaligned accesses. Therefore, ARM recommends that programmers
ensure that accesses are aligned. To avoid accidental generation of unaligned accesses, use
• If n is 32, then the value of the result is same as the value in Rm, and if the carry flag is
• ROR with shift length, n, more than 32 is the same as ROR with shift length n-32.
• LDR, LDRT
• LDRH, LDRHT
• LDRSH, LDRSHT
• STR, STRT
• STRH, STRHT
updated, it is updated to bit[31] of Rm.
“Fault Handling”
.
Figure
11-11.
SAM4S
SAM4S
87
87
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