UM10503
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© NXP B.V. 2012. All rights reserved.
User manual
Rev. 1.3 — 6 July 2012
159 of 1269
NXP Semiconductors
UM10503
Chapter 13: LPC43xx Reset Generation Unit (RGU)
13.4.1 RGU reset control register
The RGU reset control register allows software to activate and clear individual reset
outputs. Each bit corresponds to an individual reset output, and writing a one activates
that output. The reset output is automatically de-activated after a fixed delay period with
the exception of the M0APP_RST. If the reset output has a manual release, it stays
activated once pulled low until a 0 is written to the appropriate bit in this register. This
applies whether the reset activation came from the Reset Control Register or any other
source
RESET_EXT_STAT58
R/W
0x4E8
Reset external status register 58 for
SPI_RST
0x0
RESET_EXT_STAT59
-
0x4EC
Reserved
-
-
RESET_EXT_STAT60
-
0x4F0
Reserved
-
-
RESET_EXT_STAT61
-
0x4F4
Reserved
-
-
RESET_EXT_STAT62
-
0x4F8
Reserved
-
-
RESET_EXT_STAT63
-
0x4FC
Reserved
-
-
Table 113. Register overview: RGU (base address: 0x4005 3000)
…continued
Name
Access
Address
offset
Description
Reset value
Reference
Table 114. Reset control register 0 (RESET_CTRL0, address 0x4005 3100) bit description
Bit
Symbol
Description
Reset
value
Access
0
CORE_RST
Writing a one activates the reset. This bit is automatically cleared to 0
after one clock cycle.
0
W
1
PERIPH_RST
Writing a one activates the reset. This bit is automatically cleared to 0
after three clock cycles.
0
W
2
MASTER_RST
Writing a one activates the reset. This bit is automatically cleared to 0
after three clock cycles.
0
W
3
-
Reserved
0
-
4
WWDT_RST
Writing a one to this bit has no effect.
0
-
5
CREG_RST
Writing a one to this bit has no effect.
0
-
6
-
Reserved
0
-
7
-
Reserved
0
-
8
BUS_RST
Writing a one activates the reset. This bit is automatically cleared to 0
after one clock cycle. Do not use during normal operation
0
W
9
SCU_RST
Writing a one activates the reset. This bit is automatically cleared to 0
after one clock cycle.
0
W
10
-
Reserved
0
-
11
-
Reserved
0
-
12
-
Reserved
0
-
13
M4_RST
Writing a one activates the reset. This bit is automatically cleared to 0
after one clock cycle.
0
W
14
-
Reserved
0
-
15
-
Reserved
0
-
16
LCD_RST
Writing a one activates the reset. This bit is automatically cleared to 0
after one clock cycle.
0
W