LPC2460 datasheet(25/68 Pages) PHILIPS

25 / 68 page

LPC2460_2

Preliminary data sheet

Rev. 02 — 1 February 2008

25 of 68

NXP Semiconductors

LPC2460

Fast communication chip

The Thumb set’s 16-bit instruction length allows it to approach higher density compared to

standard ARM code while retaining most of the ARM’s performance.

7.2 On-chip SRAM

The LPC2460 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, too. 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.

7.3 Memory map

The LPC2460 memory map incorporates several distinct regions as shown in Table 5 and

Figure 4.

In addition, the CPU interrupt vectors may be remapped to allow them to reside in boot

ROM or SRAM (see Section 7.25.6).

Table 5.

LPC2460 memory usage and details

Address range General use

Address range details and description

0x0000 0000 to

0x3FFF FFFF

fast I/O

0x3FFF C000 to 0x3FFF FFFF

fast GPIO registers

0x4000 0000 to

0x7FFF FFFF

on-chip RAM

0x4000 0000 to 0x4000 FFFF

RAM (64 kB)

0x7FE0 0000 to 0x7FE0 3FFF

ethernet RAM (16 kB)

0x7FD0 0000 to 0x7FD0 3FFF

USB RAM (16 kB)

0x8000 0000 to

0xDFFF FFFF

off-chip memory

Four static memory banks, 16 MB each

0x8000 0000 to 0x80FF FFFF

static memory bank 0

0x8100 0000 to 0x81FF FFFF

static memory bank 1

0x8200 0000 to 0x82FF FFFF

static memory bank 2

0x8300 0000 to 0x83FF FFFF

static memory bank 3

Four dynamic memory banks, 256 MB each

0xA000 0000 to 0xAFFF FFFF

dynamic memory bank 0

0xB000 0000 to 0xBFFF FFFF

dynamic memory bank 1

0xC000 0000 to 0xCFFF FFFF

dynamic memory bank 2

0xD000 0000 to 0xDFFF FFFF

dynamic memory bank 3

0xE000 0000 to

0xEFFF FFFF

APB peripherals

36 peripheral blocks, 16 kB each

0xF000 0000 to

0xFFFF FFFF

AHB peripherals

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