Template:FW Info Downgrade

This template is used to share information between articles on J-Link/ Flasher firmware.

Parameters

Parameters may be passed in any order, when specified directly.

Parameter	Meaning	Example value	Default
JLinkOrFlasher	Should be either "J-Link" or "Flasher"	J-Link	---

Implementation

Downgrading the firmware version of a {{{JLinkOrFlasher}}} should not be necessary, usually. In the rare case that a regression was introduced with a firmware update and a firmware downgrade is required, please contact the support.

A firmware downgrade can be applied using either J-Link Commander or {{{JLinkOrFlasher}}} Configurator. It's important to install and use the {{{JLinkOrFlasher}}} software from a version that was shipped with the desired host firmware version. Information on software release versions, their release date as well as changes to firmware images can be found in the release notes.

Caution:
Outdated firmware versions may not work properly and are not covered by support!

Downgrading a firmware version using {{{JLinkOrFlasher}}} Configurator

• To downgrade the firmware of a {{{JLinkOrFlasher}}} using {{{JLinkOrFlasher}}} Configurator...
  1. Start {{{JLinkOrFlasher}}} Configurator of the desired software version
  2. Right-click on the {{{JLinkOrFlasher}}} to downgrade the firmware of
  3. Verify that the Probe/ Programmer firmware column indicates that the probe firmware version is newer than the host firmware, indicating that a firmware replacement will downgrade the version
  4. Click Replace firmware
  5. Wait for the firmware downgrade to finish
  6. The {{{JLinkOrFlasher}}}'s firmware is downgraded.
• To downgrade the firmware of a {{{JLinkOrFlasher}}} using J-Link Commander...
  1. Start J-Link Commander of the desired software version
  2. Connect to the {{{JLinkOrFlasher}}} to downgrade the firmware of
  3. Execute the InvalidateFW command string via the command: exec InvalidateFW
  4. Re-connect to the {{{JLinkOrFlasher}}} using the USB or IP commands, depending on the host interface in use
  5. The {{{JLinkOrFlasher}}} software will offer a firmware update. Accept this offer.
  6. Wait for the firmware downgrade to finish
  7. The {{{JLinkOrFlasher}}}'s firmware is downgraded.