Figure 3: Peripheral Memory Map - Philips LPC2194 User Manual

Philips Semiconductors
ARM-based Microcontroller
4.0 GB - 2 MB
Notes:
- AHB section is
128 x 16 kB blocks
(totaling 2 MB).
- VPB section is
128 x 16 kB blocks
(totaling 2 MB).
3.5 GB + 2 MB
Figures 3 through 5 show different views of the peripheral address space. Both the AHB and VPB peripheral areas are 2
megabyte spaces which are divided up into 128 peripherals. Each peripheral space is 16 kilobytes in size. This allows simplifying
the address decoding for each peripheral. All peripheral register addresses are word aligned (to 32-bit boundaries) regardless of
their size. This eliminates the need for byte lane mapping hardware that would be required to allow byte (8-bit) or half-word (16-
bit) accesses to occur at smaller boundaries. An implication of this is that word and half-word registers must be accessed all at
once. For example, it is not possible to read or write the upper byte of a word register separately.
LPC2119/2129/2292/2294 Memory Addressing
4.0 GB
AHB Peripherals
3.75 GB
VPB Peripherals
3.5 GB

Figure 3: Peripheral Memory Map

LPC2119/2129/2194/2292/2294
Reserved
Reserved
49
Preliminary User Manual
0xFFFF FFFF
0xFFE0 0000
0xFFDF FFFF
0xF000 0000
0xEFFF FFFF
0xE020 0000
0xE01F FFFF
0xE000 0000
May 03, 2004