OM11027 NXP Semiconductors, OM11027 Datasheet - Page 15
OM11027
Manufacturer Part Number
OM11027
Description
BOARD EVAL LPC2939
Manufacturer
NXP Semiconductors
Type
MCUr
Datasheet
1.OM11027.pdf
(99 pages)
Specifications of OM11027
Contents
Board
For Use With/related Products
LPC2939
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
568-4787
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NXP Semiconductors
LPC2939_3
Product data sheet
6.3 On-chip flash memory system
6.4 On-chip static RAM
The ARM968E-S processor also employs a unique architectural strategy known as
THUMB, which makes it ideally suited to high-volume applications with memory
restrictions or to applications where code density is an issue.
The key idea behind THUMB is that of a super-reduced instruction set. Essentially, the
ARM968E-S processor has two instruction sets:
The THUMB set's 16-bit instruction length allows it to approach twice the density of
standard ARM code while retaining most of the ARM's performance advantage over a
traditional 16-bit controller using 16-bit registers. This is possible because THUMB code
operates on the same 32-bit register set as ARM code.
THUMB code can provide up to 65 % of the code size of ARM, and 160 % of the
performance of an equivalent ARM controller connected to a 16-bit memory system.
The ARM968E-S processor is described in detail in the ARM968E-S data sheet
The LPC2939 includes a 768 kB flash memory system. This memory can be used for both
code and data storage. Programming of the flash memory can be accomplished via the
flash memory controller or the JTAG.
The flash controller also supports a 16 kB, byte-accessible on-chip EEPROM integrated
on the LPC2939.
In addition to the two 32 kB TCMs the LPC2939 includes two static RAM memories: one
of 32 kB and one of 16 kB. Both may be used for code and/or data storage.
In addition, 8 kB SRAM for the ETB can be used as static memory for code and data
storage. However, DMA access to this memory region is not supported.
•
•
Standard 32-bit ARMv5TE set
16-bit THUMB set
All information provided in this document is subject to legal disclaimers.
Rev. 03 — 7 April 2010
ARM9 microcontroller with CAN, LIN, and USB
LPC2939
© NXP B.V. 2010. All rights reserved.
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