Datasheet

LPC2141_42_44_46_48_2 © Koninklijke Philips Electronics N.V. 2006. All rights reserved.
Product data sheet Rev. 02 — 28 August 2006 13 of 39
Philips 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