UM10503
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2015. All rights reserved.
User manual
Rev. 2.1 — 10 December 2015
226 of 1441
NXP Semiconductors
UM10503
Chapter 15: LPC43xx/LPC43Sxx Reset Generation Unit (RGU)
The RGU monitors the reset cause for each reset output using the RESET_STATUS0 to
RESET_STATUS3 registers. The following reset causes are monitored in these registers:
•
No reset has taken place.
•
Reset generated by software (using the registers RESET_CTRL0 and
RESET_CTRL1).
•
Reset generated by any of the reset sources.
15.3.1 Reset hierarchy
The POR resets the entire chip. The reset hierarchy for the other reset sources is shown
in
[1]
Includes alarm timer and RTC. The POR does not reset the backup registers.
CAN1_RST
54
PERIPH_RST
C_CAN1 reset
CAN0_RST
55
PERIPH_RST
C_CAN0 reset
M0APP_RST
56
MASTER_RST
ARM Cortex-M0 co-processor reset.
Remark:
Software must clear the M0
processor reset by writing to the
RESET_CTRL1 register.
SGPIO_RST
57
PERIPH_RST
SGPIO reset
SPI_RST
58
PERIPH_RST
SPI reset
Reserved
59 -
-
ADCHS_RST
60
PERIPH_RST
ADCHS (12-bit ADC) reset
Reserved
63-61
-
-
Table 169. Reset output configuration
…continued
Reset output
generator
Reset
output
#
Reset source
Parts of the device reset when
activated
Table 170. Reset priority
Priority Reset input
RTC
peripherals
/
Event router/
PMC
CREG WWDT
RGU
ABP
peripherals
GPIO EMC AHB masters: Cortex
M4, Cortex M0, USB,
GPDMA, SDIO,
Ethernet
0
POR
yes
yes
yes
yes
yes
yes
yes
yes
1
External reset pin,
BOD and WWDT
resets, internal
power failure,
exiting the Deep
power-down
mode
no
partial
yes
yes
yes
yes
yes
yes
2
CORE_RST
no
partial
yes
yes
yes
yes
yes
yes
3
PERIPH_RST
no
no
no
no
yes
yes yes
yes
4
MASTER_RST
no
no
no
no
no
no
yes
yes