LPC1767FBD100,551 NXP Semiconductors, LPC1767FBD100,551 Datasheet - Page 674

• Manufacturer Part Number: LPC1767FBD100,551
• Description: IC ARM CORTEX MCU 512K 100-LQFP
• Manufacturer: NXP Semiconductors
• Series: LPC17xxr

Specifications of LPC1767FBD100,551

• Core Processor: ARM® Cortex-M3™
• Core Size: 32-Bit
• Speed: 100MHz
• Connectivity: Ethernet, I²C, IrDA, Microwire, SPI, SSI, UART/USART
• Peripherals: Brown-out Detect/Reset, DMA, I²S, Motor Control PWM, POR, PWM, WDT
• Number Of I /o: 70
• Program Memory Size: 512KB (512K x 8)
• Program Memory Type: FLASH
• Ram Size: 64K x 8
• Voltage - Supply (vcc/vdd): 2.4 V ~ 3.6 V
• Data Converters: A/D 8x12b, D/A 1x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 100-LQFP
• Processor Series: LPC17
• Core: ARM Cortex M3
• 3rd Party Development Tools: MDK-ARM, RL-ARM, ULINK2, MCB1760, MCB1760U, MCB1760UME
• For Use With: 622-1005 - USB IN-CIRCUIT PROG ARM7 LPC2K
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details
• Other names: 568-4967; 935289808551

NXP Semiconductors
UM10360
User manual
34.2.4.8.1 Syntax
34.2.4.8.2 Operation
34.2.4.8.3 Restrictions
34.2.4.8 LDREX and STREX
Load and Store Register Exclusive.
LDREX{cond} Rt, [Rn {, #offset}]
STREX{cond} Rd, Rt, [Rn {, #offset}]
LDREXB{cond} Rt, [Rn]
STREXB{cond} Rd, Rt, [Rn]
LDREXH{cond} Rt, [Rn]
STREXH{cond} Rd, Rt, [Rn]
where:
cond is an optional condition code, see
Rd is the destination register for the returned status.
Rt is the register to load or store.
Rn is the register on which the memory address is based.
offset is an optional offset applied to the value in Rn. If offset is omitted, the address is the
value in Rn.
LDREX, LDREXB, and LDREXH load a word, byte, and halfword respectively from a memory
address.
STREX, STREXB, and STREXH attempt to store a word, byte, and halfword respectively to a
memory address. The address used in any Store-Exclusive instruction must be the same
as the address in the most recently executed Load-exclusive instruction. The value stored
by the Store-Exclusive instruction must also have the same data size as the value loaded
by the preceding Load-exclusive instruction. This means software must always use a
Load-exclusive instruction and a matching Store-Exclusive instruction to perform a
synchronization operation, see
If an Store-Exclusive instruction performs the store, it writes 0 to its destination register. If
it does not perform the store, it writes 1 to its destination register. If the Store-Exclusive
instruction writes 0 to the destination register, it is guaranteed that no other process in the
system has accessed the memory location between the Load-exclusive and
Store-Exclusive instructions.
For reasons of performance, keep the number of instructions between corresponding
Load-Exclusive and Store-Exclusive instruction to a minimum.
Remark: The result of executing a Store-Exclusive instruction to an address that is
different from that used in the preceding Load-Exclusive instruction is unpredictable.
In these instructions:
All information provided in this document is subject to legal disclaimers.
Rev. 2 — 19 August 2010
Section 34.3.2.7 “Synchronization primitives”
Section 34.2.3.7 “Conditional
Chapter 34: Appendix: Cortex-M3 user guide
execution”.
UM10360
© NXP B.V. 2010. All rights reserved.
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