OM13005,598 NXP Semiconductors, OM13005,598 Datasheet - Page 236
OM13005,598
Manufacturer Part Number
OM13005,598
Description
BOARD EVAL EM773 METER US PLUG
Manufacturer
NXP Semiconductors
Type
Other Power Managementr
Specifications of OM13005,598
Design Resources
Plug Meter Schematics, Gerber Files USB Dongle Schematics, Gerber Files
Main Purpose
Power Management, Energy/Power Meter
Embedded
Yes, MCU, 32-Bit
Utilized Ic / Part
EM773FHN33,551
Interface Type
USB
Maximum Operating Temperature
+ 150 C
Operating Supply Voltage
1.8 V to 3.6 V
Product
Power Management Development Tools
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Primary Attributes
-
Secondary Attributes
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
For Use With/related Products
EM773, OL2381
Other names
568-6680
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NXP Semiconductors
UM10415
User manual
20.3.2.4 Software ordering of memory accesses
Table 224. Memory access behavior
[1]
The Code, SRAM, and external RAM regions can hold programs.
The order of instructions in the program flow does not always guarantee the order of the
corresponding memory transactions. This is because:
Section 20–20.3.2.2
of memory accesses. Otherwise, if the order of memory accesses is critical, software
must include memory barrier instructions to force that ordering. The processor provides
the following memory barrier instructions:
DMB — The Data Memory Barrier (DMB) instruction ensures that outstanding memory
transactions complete before subsequent memory transactions. See
DSB — The Data Synchronization Barrier (DSB) instruction ensures that outstanding
memory transactions complete before subsequent instructions execute. See
Section
ISB — The Instruction Synchronization Barrier (ISB) ensures that the effect of all
completed memory transactions is recognizable by subsequent instructions. See
Section
The following are examples of using memory barrier instructions:
Address
range
0x00000000-
0x1FFFFFFF
0x20000000-
0x3FFFFFFF
0x40000000-
0x5FFFFFFF
0x60000000-
0x9FFFFFFF
0xA0000000-
0xDFFFFFFF
0xE0000000-
0xE00FFFFF
0xE0100000-
0xFFFFFFFF
•
•
•
See
the processor can reorder some memory accesses to improve efficiency, providing
this does not affect the behavior of the instruction sequence
memory or devices in the memory map might have different wait states
some memory accesses are buffered or speculative.
Section 20–20.3.2.1
20–20.4.7.4.
20–20.4.7.5.
Memory
region
Code
SRAM
Peripheral
External
RAM
External
device
Private Peripheral
Bus
Device
All information provided in this document is subject to legal disclaimers.
describes the cases where the memory system guarantees the order
Rev. 1 — 10 September 2010
for more information.
Chapter 20: Appendix EM773 ARM Cortex-M0 reference
Memory
type
Normal
Normal
Device
Normal
Device
Strongly-ordered
Device
[1]
XN
-
-
XN
-
XN
XN
XN
[1]
Description
Executable region for program
code. You can also put data here.
Executable region for data. You
can also put code here.
External device memory.
Executable region for data.
External device memory.
This region includes the NVIC,
System timer, and System Control
Block. Only word accesses can be
used in this region.
Vendor specific.
Section
UM10415
© NXP B.V. 2010. All rights reserved.
20–20.4.7.3.
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