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UM10503
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© NXP B.V. 2015. All rights reserved.
User manual
Rev. 2.1 — 10 December 2015
224 of 1441
NXP Semiconductors
UM10503
Chapter 15: LPC43xx/LPC43Sxx Reset Generation Unit (RGU)
Fig 41. RGU Block diagram
24
RGU
RESET
BOD reset
WWDT reset
POR
CORE_RST
GENERATOR
PERIPH_RST
GENERATOR
MASTER_RST
GENERATOR
WWDT
APB peripherals, GPIO
Bus bridges,
memory controllers
AHB peripherals (USB0/1, LCD
Ethernet, GPDMA, SDIO)
Cortex-M4 core
CREG (partial), PMC
6
RTC POWER DOMAIN
alarm timer, RTC, CREG (partial), PMC
Table 169. Reset output configuration
Reset output
generator
Reset
output
#
Reset source
Parts of the device reset when
activated
CORE_RST
0
external reset pin
RESET, BOD
reset, WWDT
time-out reset,
internal power
failure, exiting
from Deep
power-down
Entire chip except:
•
peripherals in the battery-powered
domain.
•
parts of creg.
PERIPH_RST
1
CORE_RST
All peripherals with reset source
PERIPH_RST and MASTER_RST
MASTER_RST
2
PERIPH_RST
All peripherals with reset source
MASTER_RST
Reserved
3
-
-
WWDT_RST
4
CORE_RST
WWDT. No software reset.
CREG_RST
5
CORE_RST
Configuration register block, Event router,
backup registers, RTC, alarm timer. No
software reset.
Reserved
6 - 7
-
-
SCU_RST
9
PERIPH_RST
System control unit
Reserved
10 - 11
-
-
M0SUB_RST
12
MASTER_RST
ARM Cortex-M0 subsystem core reset.
Remark:
Software must clear this reset
by writing to the RESET_CTRL0 register.
M4_RST
13
MASTER_RST
Cortex-M4 system reset.
Reserved
14
-
-