LM3S2965-IQN25-A0T ETC2 [List of Unclassifed Manufacturers], LM3S2965-IQN25-A0T Datasheet - Page 122
![no-image](/images/no-image-200.jpg)
LM3S2965-IQN25-A0T
Manufacturer Part Number
LM3S2965-IQN25-A0T
Description
Microcontroller
Manufacturer
ETC2 [List of Unclassifed Manufacturers]
Datasheet
1.LM3S2965-IQN25-A0T.pdf
(542 pages)
- Current page: 122 of 542
- Download datasheet (6Mb)
Hibernation Module
7.2.5
7.2.6
7.2.7
7.3
122
Non-Volatile Memory
The Hibernation module contains 64 32-bit words of memory which are retained during hibernation.
This memory is powered from the battery or auxillary power supply during hibernation. The processor
software can save state information in this memory prior to hibernation, and can then recover the
state upon waking. The non-volatile memory can be accessed through the HIBDATA registers.
Power Control
The Hibernation module controls power to the processor through the use of the HIB pin, which is
intended to be connected to the enable signal of the external regulator(s) providing 3.3 V and/or 2.5
V to the microcontroller. When the HIB signal is asserted by the Hibernation module, the external
regulator is turned off and no longer powers the microcontroller. The Hibernation module remains
powered from the VBAT supply, which could be a battery or an auxillary power source. Hibernation
mode is initiated by the microcontroller setting the HIBREQ bit of the HIBCTL register. Prior to doing
this, a wake-up condition must be configured, either from the external WAKE pin, or by using an RTC
match.
The Hibernation module is configured to wake from the external WAKE pin by setting the PINWEN
bit of the HIBCTL register. It is configured to wake from RTC match by setting the RTCWEN bit. Either
one or both of these bits can be set prior to going into hibernation.
When the Hibernation module wakes, the microcontroller will see a normal power-on reset. It can
detect that the power-on was due to a wake from hibernation by examining the raw interrupt status
register (see “Interrupts and Status” on page 122) and by looking for state data in the non-volatile
memory (see “Non-Volatile Memory” on page 122).
Interrupts and Status
The Hibernation module can generate interrupts when the following conditions occur:
■
■
■
All of the interrupts are ORed together before being sent to the interrupt controller, so the Hibernate
module can only generate a single interrupt request to the controller at any given time. The software
interrupt handler can service multiple interrupt events by reading the HIBMIS register. Software can
also read the status of the Hibernation module at any time by reading the HIBRIS register which
shows all of the pending events. This register can be used at power-on to see if a wake condition
is pending, which indicates to the software that a hibernation wake occurred.
The events that can trigger an interrupt are configured by setting the appropriate bits in the HIBIM
register. Pending interrupts can be cleared by writing the corresponding bit in the HIBIC register.
Initialization and Configuration
The Hibernation module can be configured in several different combinations. The following sections
show the recommended programming sequence for various scenarios. The examples below assume
that a 32.768-kHz oscillator is used, and thus always show bit 2 (CLKSEL) of the HIBCTL register
set to 1. If a 4.194304-MHz crystal is used instead, then the CLKSEL bit remains cleared. Because
the Hibernation module runs at 32 kHz and is asynchronous to the rest of the system, software must
allow a delay of t
Assertion of WAKE pin
RTC match
Low battery detected
HIB_REG_WRITE
after writes to certain registers (see “Register Access
Preliminary
June 04, 2007
Related parts for LM3S2965-IQN25-A0T
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
![LM3S2965](/images/no-image3.png)
Part Number:
Description:
Lm3s2965 Arm Microcontroller
Manufacturer:
Luminary Micro, Inc
Datasheet:
![LM3S2965-IQC20-A0T](/images/no-image3.png)
Part Number:
Description:
Microcontroller
Manufacturer:
Luminary Micro, Inc.
Datasheet:
![LM3S2965-IRN50-A1T](/images/no-image3.png)
Part Number:
Description:
Microcontroller
Manufacturer:
ETC2 [List of Unclassifed Manufacturers]
Datasheet:
![302R29N101JV4E](/images/no-image3.png)
Part Number:
Description:
SAFETY CERTIFIED CAPACITORS
Manufacturer:
ETC2 [List of Unclassifed Manufacturers]
Datasheet:
![ATS75D8](/images/no-image3.png)
Part Number:
Description:
LOW- OLTAGE 2-WIRE DIGITAL TEMPERATURE SENSOR With Thermal Alarm
Manufacturer:
ETC2 [List of Unclassifed Manufacturers]
Datasheet:
![FS6284-01](/images/no-image3.png)
Part Number:
Description:
Dual PLL Clock Generator IC
Manufacturer:
ETC2 [List of Unclassifed Manufacturers]
Datasheet:
![AIC1531](/images/no-image3.png)
Part Number:
Description:
500mA Dual Linear Regulator with Internal Power Switch
Manufacturer:
ETC2 [List of Unclassifed Manufacturers]
Datasheet:
![TC9122P](/images/no-image3.png)
Part Number:
Description:
HIGH-SPEED BCD PROGRAMMABLE COUNTER
Manufacturer:
ETC2 [List of Unclassifed Manufacturers]
Datasheet:
![STT116GK16](/images/no-image3.png)
Part Number:
Description:
Thyristor-Thyristor Modules
Manufacturer:
ETC2 [List of Unclassifed Manufacturers]
Datasheet:
![STT500GK16](/images/no-image3.png)
Part Number:
Description:
Thyristor-Thyristor Modules
Manufacturer:
ETC2 [List of Unclassifed Manufacturers]
Datasheet:
![MSCA-1502](/images/no-image3.png)
Part Number:
Description:
15W Ultraminiature Modular Switching Power Supplies
Manufacturer:
ETC2 [List of Unclassifed Manufacturers]
Datasheet:
![CPT-DIN](/images/no-image3.png)
Part Number:
Description:
Energy Management Compact Power Transducer
Manufacturer:
ETC2 [List of Unclassifed Manufacturers]
Datasheet:
![UFT-1](/images/no-image3.png)
Part Number:
Description:
UNIVERSAL FLOW TRANSMITTER
Manufacturer:
ETC2 [List of Unclassifed Manufacturers]
Datasheet:
![L431LM5B](/images/no-image3.png)
Part Number:
Description:
1.24V Low-Voltage Adjustable Precision Shunt Regulator
Manufacturer:
ETC2 [List of Unclassifed Manufacturers]
Datasheet:
![110C2-315](/images/no-image3.png)
Part Number:
Description:
118 SERIES AM REMOTE CONTROL SYSTEMS.
Manufacturer:
ETC2 [List of Unclassifed Manufacturers]
Datasheet: