SAM4S16C Atmel Corporation, SAM4S16C Datasheet - Page 146
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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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11.6.6.7
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SAM4S
SAM4S
SMMLA and SMMLS
Signed Most Significant Word Multiply Accumulate and Signed Most Significant Word Multiply
Subtract
Syntax
op{R}{cond} Rd, Rn, Rm, Ra
where:
op
R
cond
Rd
Rn, Rm
Ra
Operation
The
The
The
The
Restrictions
In these instructions:
Condition Flags
These instructions do not affect the condition code flags.
Examples
SMMLA
• Multiplies the values in
• Optionally rounds the result by adding
• Extracts the most significant 32 bits of the result.
• Adds the value of
• Writes the result of the addition in
• Multiplies the values in
• Optionally rounds the result by adding
• Extracts the most significant 32 bits of the result.
• Subtracts the extracted value of the result from the value in
• Writes the result of the subtraction in
• Do not use SP and do not use PC.
SMMLA
SMMLA
SMMLS
SMMLS
instruction interprets the values from
instruction:
instruction interprets the values from
instruction:
R0, R4, R5, R6 ; Multiplies R4 and R5, extracts top 32 bits, adds
is one of:
SMMLA
SMMLS
is a rounding error flag. If
In this case the constant
extracted.
is an optional condition code, see
is the destination register.
are registers holding the first and second multiply operands.
is the register holding the accumulate value.
Ra
Signed Most Significant Word Multiply Accumulate.
Signed Most Significant Word Multiply Subtract.
to the signed extracted value.
Rn
Rn
; R6, truncates and writes to R0
and
and
Rm
Rm
.
.
Rd
0x80000000
R
is specified, the result is rounded instead of being truncated.
.
Rd
0x80000000
0x80000000
.
“Conditional Execution”
is added to the product before the high word is
Rn
Rn
and
.
and
.
Rm
Rm
as signed 32-bit words.
as signed 32-bit words.
Ra
.
.
11100A–ATARM–28-Oct-11
11100A–ATARM–28-Oct-11
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