ATSAM3U-EK Atmel, ATSAM3U-EK Datasheet - Page 118

• Manufacturer Part Number: ATSAM3U-EK
• Description: KIT EVAL FOR AT91SAM3U CORTEX
• Manufacturer: Atmel
• Type: MCUr

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

13.11.9
13.11.9.1
13.11.9.2
13.11.9.3
13.11.9.4
118
CLREX
SAM3U Series
CLREX
Syntax
Operation
Condition flags
Examples
Clear Exclusive.
where:
cond
Use CLREX to make the next STREX, STREXB, or STREXH instruction write 1 to its destination
register and fail to perform the store. It is useful in exception handler code to force the failure of
the store exclusive if the exception occurs between a load exclusive instruction and the match-
ing store exclusive instruction in a synchronization operation.
See
These instructions do not change the flags.
CLREX{cond}
“Synchronization primitives” on page 77
is an optional condition code, see
for more information.
“Conditional execution” on page
6430D–ATARM–25-Mar-11
100.