ATSAM3U-EK Atmel, ATSAM3U-EK Datasheet - Page 137
ATSAM3U-EK
Manufacturer Part Number
ATSAM3U-EK
Description
KIT EVAL FOR AT91SAM3U CORTEX
Manufacturer
Atmel
Type
MCUr
Datasheets
1.ATSAM3U-EK.pdf
(2 pages)
2.ATSAM3U-EK.pdf
(61 pages)
3.ATSAM3U-EK.pdf
(1171 pages)
4.ATSAM3U-EK.pdf
(53 pages)
Specifications of ATSAM3U-EK
Contents
Board
Processor To Be Evaluated
SAM3U
Data Bus Width
32 bit
Interface Type
RS-232, USB
Operating Supply Voltage
3 V
Silicon Manufacturer
Atmel
Core Architecture
ARM
Core Sub-architecture
Cortex - M3
Silicon Core Number
SAM3U4E
Silicon Family Name
SAM3U
Kit Contents
Board CD Docs
Rohs Compliant
Yes
For Use With/related Products
AT91SAM3U
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ATSAM3U-EK
Manufacturer:
Atmel
Quantity:
10
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13.13.2
13.13.2.1
13.13.2.2
13.13.2.3
13.13.2.4
13.13.2.5
6430D–ATARM–25-Mar-11
UMULL
SMLAL
UMULL, UMLAL, SMULL, and SMLAL
Syntax
Operation
Restrictions
Condition flags
Examples
R0, R4, R5, R6
R4, R5, R3, R8
Signed and Unsigned Long Multiply, with optional Accumulate, using 32-bit operands and pro-
ducing a 64-bit result.
where:
op
cond
RdHi, RdLo
Rn, Rm
The UMULL instruction interprets the values from Rn and Rm as unsigned integers. It multiplies
these integers and places the least significant 32 bits of the result in RdLo, and the most signifi-
cant 32 bits of the result in RdHi.
The UMLAL instruction interprets the values from Rn and Rm as unsigned integers. It multiplies
these integers, adds the 64-bit result to the 64-bit unsigned integer contained in RdHi and RdLo,
and writes the result back to RdHi and RdLo.
The SMULL instruction interprets the values from Rn and Rm as two’s complement signed inte-
gers. It multiplies these integers and places the least significant 32 bits of the result in RdLo, and
the most significant 32 bits of the result in RdHi.
The SMLAL instruction interprets the values from Rn and Rm as two’s complement signed inte-
gers. It multiplies these integers, adds the 64-bit result to the 64-bit signed integer contained in
RdHi and RdLo, and writes the result back to RdHi and RdLo.
In these instructions:
These instructions do not affect the condition code flags.
• do not use SP and do not use PC
• RdHi and RdLo must be different registers.
op{cond} RdLo, RdHi, Rn, Rm
UMULL Unsigned Long Multiply.
UMLAL Unsigned Long Multiply, with Accumulate.
SMULL Signed Long Multiply.
SMLAL Signed Long Multiply, with Accumulate.
is one of:
is an optional condition code, see
are the destination registers.
For UMLAL and SMLAL they also hold the accumulating value.
are registers holding the operands.
; Unsigned (R4,R0) = R5 x R6
; Signed (R5,R4) = (R5,R4) + R3 x R8
“Conditional execution” on page
SAM3U Series
100.
137
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