UM10503
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© NXP B.V. 2012. All rights reserved.
User manual
Rev. 1.3 — 6 July 2012
173 of 1269
NXP Semiconductors
UM10503
Chapter 13: LPC43xx Reset Generation Unit (RGU)
13.4.4.1 Reset external status register 0 for CORE_RST
This register shows whether or not any of the inputs to the CORE_RST reset generator
has activated the CORE_RST. The CORE_RST can be activated by the external reset
pin, a WWDT time-out, a BOD reset or by writing to bit 0 of the RESET_CTRL0 register.
13.4.4.2 Reset external status register 1 for PERIPH_RST
This register shows whether or not the CORE_RST output has activated the
PERIPH_RST. A reset generated from the CORE_RST is the only possible reset source
for the PERIPH_RST aside from a software reset by writing to the RESET_CTRL register.
Table 122. Reset external status register 0 (RESET_EXT_STAT0, address 0x4005 3400) bit
description
Bit
Symbol
Description
Reset
value
Access
0
EXT_RESET
Reset activated by external reset from reset pin.
Write 0 to clear.
0 = Reset not activated by reset pin
1 = Reset activated
0
R/W
1
-
Reserved. Do not modify; read as logic 0.
0
-
2
-
Reserved. Do not modify; read as logic 0.
0
-
3
-
Reserved. Do not modify; read as logic 0.
0
-
4
BOD_RESET
Reset activated by BOD reset. Write 0 to clear.
0 = Reset not activated by BOD
1 = Reset activated
0
R/W
5
WWDT_RESET Reset activated by WWDT time-out. Write 0 to clear.
0 = Reset not activated by WWDT
1 = Reset activated
0
R/W
31:6
-
Reserved. Do not modify; read as logic 0.
0
-
Table 123. Reset external status register 1 (RESET_EXT_STAT1, address 0x4005 3404) bit
description
Bit
Symbol
Description
Reset
value
Access
0
-
Reserved. Do not modify; read as logic 0.
0
-
1
CORE_RESET Reset activated by CORE_RST output. Write 0 to
clear.
0 = Reset not activated
1 = Reset activated
0
R/W
31:2
-
Reserved. Do not modify; read as logic 0.
0
-