LPC2157 datasheet(16/45 Pages) NXP

16 / 45 page

LPC2157_2158_2

Product data sheet

Rev. 02 — 9 February 2009

16 of 45

NXP Semiconductors

LPC2157/2158

Single-chip 16-bit/32-bit microcontrollers

In case of LPC2158 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 LPC2157/2158 memory map incorporates several distinct regions, as shown in

Figure 6.

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”.

6.5 Interrupt controller

The Vectored Interrupt Controller (VIC) accepts all of the interrupt request inputs and

categorizes them as Fast Interrupt Request (FIQ), vectored Interrupt Request (IRQ), and

non-vectored IRQ as deﬁned by programmable settings. The programmable assignment

scheme means that priorities of interrupts from the various peripherals can be dynamically

assigned and adjusted.

Fig 6.

LPC2157/2158 memory map

AHB PERIPHERALS

APB PERIPHERALS

RESERVED ADDRESS SPACE

BOOT BLOCK (RE-MAPPED FROM

ON-CHIP FLASH MEMORY

RESERVED ADDRESS SPACE

32 kB ON-CHIP STATIC RAM (LPC2157/2158)

512 kB ON-CHIP NON-VOLATILE MEMORY

(LPC2157/2158)

0xFFFF FFFF

0xF000 0000

0xE000 0000

0xC000 0000

0x8000 0000

0x7FFF FFFF

0x4000 4000

0x4001 8000

0x4000 7FFF

0x7FFF D000

0x7FFF CFFF

0x0008 0000

0x0007 FFFF

0x0001 0000

4.0 GB

3.75 GB

3.5 GB

3.0 GB

2.0 GB

1.0 GB

0.0 GB

002aad402

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