ARM IM-AD1 Bedienungsanleitung PDF herunterladen (Seite 14)

Product data sheet Rev. 5 — 12 August 2011 14 of 45

NXP Semiconductors

LPC2141/42/44/46/48

Single-chip 16-bit/32-bit microcontrollers

6.3 On-chip static RAM

On-chip static RAM may be used for code and/or data storage. The SRAM may be

accessed as 8-bit, 16-bit, and 32-bit. The LPC2141, LPC2142/44 and LPC2146/48

provide 8 kB, 16 kB and 32 kB of static RAM respectively.

In case of LPC2146/48 only, an 8 kB SRAM block intended to be utilized mainly by the

USB can also be used as a general purpose RAM for data storage and code storage and

execution.

6.4 Memory map

The LPC2141/42/44/46/48 memory map incorporates several distinct regions, as shown

in Figure 5

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

flash memory (the default) or on-chip static RAM. This is described in Section 6.19

“System control”.

Fig 5. LPC2141/42/44/46/48 memory map

AHB PERIPHERALS

VPB PERIPHERALS

RESERVED ADDRESS SPACE

BOOT BLOCK (12 kB REMAPPED FROM

ON-CHIP FLASH MEMORY

RESERVED ADDRESS SPACE

0xFFFF FFFF

0xF000 0000

0xE000 0000

0xC000 0000

0x8000 0000

0x7FFF FFFF

0x7FD0 2000

TOTAL OF 512 kB ON-CHIP NON-VOLATILE MEMORY

(LPC2148)

0x0004 0000

0x0007 FFFF

TOTAL OF 256 kB ON-CHIP NON-VOLATILE MEMORY

(LPC2146)

0x0002 0000

0x0003 FFFF

TOTAL OF 128 kB ON-CHIP NON-VOLATILE MEMORY

(LPC2144)

0x0001 0000

0x0001 FFFF

TOTAL OF 64 kB ON-CHIP NON-VOLATILE MEMORY

(LPC2142)

0x0000 8000

0x0000 FFFF

TOTAL OF 32 kB ON-CHIP NON-VOLATILE MEMORY

(LPC2141)

0x0000 0000

0x0000 7FFF

RESERVED ADDRESS SPACE

0x0008 0000

0x3FFF FFFF

8 kB ON-CHIP STATIC RAM (LPC2141)

0x4000 0000

0x4000 1FFF

16 kB ON-CHIP STATIC RAM (LPC2142/2144)

0x4000 2000

0x4000 3FFF

32 kB ON-CHIP STATIC RAM (LPC2146/2148)

0x4000 4000

0x4000 7FFF

RESERVED ADDRESS SPACE

0x4000 8000

0x7FCF FFFF

8 kB ON-CHIP USB DMA RAM (LPC2146/2148)

0x7FD0 0000

0x7FD0 1FFF

0x7FFF D000

0x7FFF CFFF

4.0 GB

3.75 GB

3.5 GB

3.0 GB

2.0 GB

1.0 GB

0.0 GB

002aab558

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LPC2141/42/44/46/48 1

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