SAM3S1A Atmel Corporation, SAM3S1A Datasheet - Page 120

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SAM3S1A

Manufacturer Part Number
SAM3S1A
Description
Manufacturer
Atmel Corporation
Datasheets

Specifications of SAM3S1A

Flash (kbytes)
64 Kbytes
Pin Count
48
Max. Operating Frequency
64 MHz
Cpu
Cortex-M3
# Of Touch Channels
17
Hardware Qtouch Acquisition
No
Max I/o Pins
34
Ext Interrupts
34
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)
16
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
10.14.1
10.14.1.1
10.14.1.2
10.14.1.3
10.14.1.4
10.14.1.5
120
MUL
MLA
MULS
MULLT
MLS
SAM3S
MUL, MLA, and MLS
Syntax
Operation
Restrictions
Condition flags
Examples
R10, R2, R5
R10, R2, R1, R5 ; Multiply with accumulate, R10 = (R2 x R1) + R5
R0, R2, R2
R2, R3, R2
R4, R5, R6, R7
Multiply, Multiply with Accumulate, and Multiply with Subtract, using 32-bit operands, and pro-
ducing a 32-bit result.
where:
cond
S
result of the operation, see
Rd
Rn, Rm
Ra
The MUL instruction multiplies the values from Rn and Rm, and places the least significant 32
bits of the result in Rd.
The MLA instruction multiplies the values from Rn and Rm, adds the value from Ra, and places
the least significant 32 bits of the result in Rd.
The MLS instruction multiplies the values from Rn and Rm, subtracts the product from the value
from Ra, and places the least significant 32 bits of the result in Rd.
The results of these instructions do not depend on whether the operands are signed or
unsigned.
In these instructions, do not use SP and do not use PC.
If you use the S suffix with the MUL instruction:
If S is specified, the MUL instruction:
• Rd, Rn, and Rm must all be in the range R0 to R7
• Rd must be the same as Rm
• you must not use the cond suffix.
• updates the N and Z flags according to the result
• does not affect the C and V flags.
MUL{S}{cond} {Rd,} Rn, Rm ; Multiply
MLA{cond} Rd, Rn, Rm, Ra
MLS{cond} Rd, Rn, Rm, Ra
; Multiply, R10 = R2 x R5
; Multiply with flag update, R0 = R2 x R2
; Conditionally multiply, R2 = R3 x R2
; Multiply with subtract, R4 = R7 - (R5 x R6)
is an optional condition code, see
is an optional suffix. If S is specified, the condition code flags are updated on the
is the destination register. If Rd is omitted, the destination register is Rn.
are registers holding the values to be multiplied.
is a register holding the value to be added or subtracted from.
“Conditional execution” on page
; Multiply with accumulate
; Multiply with subtract
“Conditional execution” on page
84.
6500C–ATARM–8-Feb-11
84.

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