LPC2458 NXP Semiconductors, LPC2458 Datasheet - Page 22

NXP Semiconductors designed the LPC2458 microcontroller around a 16-bit/32-bitARM7TDMI-S CPU core with real-time debug interfaces that include both JTAG andembedded trace

LPC2458

Manufacturer Part Number
LPC2458
Description
NXP Semiconductors designed the LPC2458 microcontroller around a 16-bit/32-bitARM7TDMI-S CPU core with real-time debug interfaces that include both JTAG andembedded trace
Manufacturer
NXP Semiconductors
Datasheet

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LPC2458
Product data sheet
7.3 On-chip SRAM
7.4 Memory map
The LPC2458 includes a SRAM memory of 64 kB reserved for the ARM processor
exclusive use. This RAM may be used for code and/or data storage and may be accessed
as 8 bits, 16 bits, and 32 bits.
A 16 kB SRAM block serving as a buffer for the Ethernet controller and a 16 kB SRAM
associated with the second AHB can be used both for data and code storage. The 2 kB
RTC SRAM can be used for data storage only. The RTC SRAM is battery powered and
retains the content in the absence of the main power supply.
The LPC2458 memory map incorporates several distinct regions as shown in
Figure
In addition, the CPU interrupt vectors may be remapped to allow them to reside in either
flash memory (default), boot ROM, or SRAM (see
Table 5.
Address range General use
0x0000 0000 to
0x3FFF FFFF
0x4000 0000 to
0x7FFF FFFF
0x8000 0000 to
0xBFFF FFFF
0xE000 0000 to
0xEFFF FFFF
0xF000 0000 to
0xFFFF FFFF
3.
LPC2458 memory usage and details
All information provided in this document is subject to legal disclaimers.
on-chip
non-volatile
memory and fast
I/O
on-chip RAM
off-chip memory
APB peripherals
AHB peripherals
Rev. 4 — 1 September 2011
Address range details and description
0x0000 0000 to 0x0007 FFFF
0x3FFF C000 to 0x3FFF FFFF
0x4000 0000 to 0x4000 FFFF
0x7FE0 0000 to 0x7FE0 3FFF
0x7FD0 0000 to 0x7FD0 3FFF
two static memory banks, 1 MB each
0x8000 0000 to 0x800F FFFF
0x8100 0000 to 0x810F FFFF
two dynamic memory banks, 256 MB each
0xA000 0000 to 0xAFFF FFFF
0xB000 0000 to 0xBFFF FFFF
36 peripheral blocks, 16 kB each
Section
Single-chip 16-bit/32-bit micro
7.26.6).
RAM (64 kB)
USB RAM (16 kB)
flash memory (512 kB)
fast GPIO registers
Ethernet RAM (16 kB)
static memory bank 0
static memory bank 1
dynamic memory bank 0
dynamic memory bank 1
LPC2458
© NXP B.V. 2011. All rights reserved.
Table 5
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and

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