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SLAS826F – MARCH 2015 – REVISED MARCH 2017
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Detailed Description
Copyright © 2015–2017, Texas Instruments Incorporated
6.8.1.4
Soft Reset
The Soft Reset resets only the execution component of the system, which is the nondebug logic in the
Cortex-M4 and the WDT_A. This reset remains nonintrusive to all other peripherals and system
components. The MSP432P401x MCUs support up to 16 sources of Soft Reset.
lists the reset
source allocation. The Reset Controller registers can be used to identify the source of reset in the design.
For further details, see the
Reset Controller
chapter in the
MSP432P4xx SimpleLink™ Microcontrollers
(1)
The WDT_A generated resets can be mapped either as a Hard Reset or a Soft Reset.
(2)
Reserved indicates that this source of Soft Reset is currently unused and left for future expansion.
Table 6-41. MSP432P401x Soft Reset Sources
RESET SOURCE
NUMBER
SOURCE
0
CPU LOCKUP Condition (LOCKUP output of Cortex-M4)
1
WDT_A Time-out
(1)
2
WDT_A Password Violation
(1)
3
Reserved
(2)
4
Reserved
(2)
5
Reserved
(2)
6
Reserved
(2)
7
Reserved
(2)
8
Reserved
(2)
9
Reserved
(2)
10
Reserved
(2)
11
Reserved
(2)
12
Reserved
(2)
13
Reserved
(2)
14
Reserved
(2)
15
Reserved
(2)
NOTE
To support and enhance debug of reset conditions, the Reset Controller is located on the
PPB of the device. This allows the Reset Controller to remain accessible even if the device is
stuck in a Hard or Soft reset state. The Reset Controller permits overrides for Hard and Soft
resets, thereby allowing an application to regain control of the device and isolate the cause
of the stuck reset.
6.8.2
Power Supply System (PSS)
The PSS controls all the power supply related functionality of the device. It consists of the following
components.
6.8.2.1
VCCDET
The VCCDET monitors the input voltage applied at the DVCC and AVCC pins of the device. When the
V
CC
is found to be below the operating range of the VCCDET trip points, it generates a brownout
condition, thereby initiating a device reset (POR class reset).