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J-Link / J-Trace User Guide (UM08001) - Microcontrollers

J-Link / J-Trace User Guide (UM08001) - Microcontrollers

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130 CHAPTER 5 Working with J-<strong>Link</strong> and J-<strong>Trace</strong><br />

5.11.1.16 SetSysPowerDownOnIdle<br />

When using this command, the target CPU is powered-down when no transmission<br />

between J-<strong>Link</strong> and the target CPU was performed for a specific time. When the next<br />

command is given, the CPU is powered-up.<br />

Note: This command works only for Cortex-M3 devices.<br />

Typical applications<br />

This feature is useful to reduce the power consumption of the CPU.<br />

Syntax<br />

SetSysPowerDownOnIdle = <br />

Note: A 0 for disables the power-down on idle functionality.<br />

Example<br />

SetSysPowerDownOnIdle = 10; // The target CPU is powered-down when there is no<br />

// transmission between J-<strong>Link</strong> and target CPU for at least<br />

10ms<br />

5.11.1.17 SupplyPower<br />

This command activates power supply over pin 19 of the JTAG connector. The KS<br />

(Kickstart) versions of J-<strong>Link</strong> have the V5 supply over pin 19 activated by default.<br />

Typical applications<br />

This feature is useful for some eval boards that can be powered over the JTAG connector.<br />

Syntax<br />

SupplyPower = 0 | 1<br />

Example<br />

SupplyPower = 1<br />

5.11.1.18 SupplyPowerDefault<br />

This command activates power supply over pin 19 of the JTAG connector permanently.<br />

The KS (Kickstart) versions of J-<strong>Link</strong> have the V5 supply over pin 19 activated<br />

by default.<br />

Typical applications<br />

This feature is useful for some eval boards that can be powered over the JTAG connector.<br />

Syntax<br />

SupplyPowerDefault = 0 | 1<br />

Example<br />

SupplyPowerDefault = 1<br />

J-<strong>Link</strong> / J-<strong>Trace</strong> (<strong>UM08001</strong>) © 2004-2010 SEGGER Microcontroller GmbH & Co. KG

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