UM10503
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© NXP B.V. 2012. All rights reserved.
User manual
Rev. 1.3 — 6 July 2012
91 of 1269
NXP Semiconductors
UM10503
Chapter 10: LPC43xx Power Management Controller (PMC)
10.2.6 Memory retention in Power-down modes
shows which parts of the SRAM memory are preserved in Sleep mode and the
various power-down modes.
In addition, all FIFO memory contained in the peripheral blocks (USB0/1, LCD, CAN,
Ethernet, USART0/2/3, UART) is retained in Sleep mode and Deep-sleep mode but not in
Power-down mode and Deep-power-down mode.
[1]
64 kB for LPC4350/30; 32 kB for LPC4320/10 and parts with on-chip flash
[2]
For LPC4350/30 starting at 0x1009 0000; for LPC4320/10 and parts with on-chip flash starting at 0x1008 8000.
10.3 Register description
Table 57.
Memory retention
Mode
128 kB local
SRAM starting
at 0x1000 0000
64/32 kB Local
SRAM starting at
0x1008 0000
8 kB local SRAM
starting at
0x1009 0000/
0x1008 8000
64 kB AHB SRAM
starting at
0x2000 0000
256 byte backup
registers at
0x4004 1000
(RTC power
domain)
Sleep mode
yes
yes
yes
yes
yes
Deep-sleep mode
yes
yes
yes
yes
yes
Power-down mode no
no
yes
no
yes
Deep power-down
mode
no
no
no
no
yes
Table 58.
Register overview: Power Mode Controller (PMC) (base address 0x4004 2000)
Name
Access
Address
offset
Description
Reset
value
Reference
PD0_SLEEP0_HW_ENA R/W
0x000
Hardware sleep event
enable register
0x0000
0001
-
-
0x004 -
0x018
Reserved
-
-
PD0_SLEEP0_MODE
R/W
0x01C
Power-down mode
control register
0x003F
FF7F