Chip Errata for the i.MX23 - Guy Carpenter
Chip Errata for the i.MX23 - Guy Carpenter
Chip Errata for the i.MX23 - Guy Carpenter
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2815<br />
2815 The hardware functionality to disable battery brownouts when 5 V is<br />
present always does NOT follow <strong>the</strong> VBUSVALID_5VDETECT value.<br />
Description:<br />
The hardware functionality to disable battery brownouts when 5 V is present does NOT follow <strong>the</strong><br />
VBUSVALID_5VDETECT value. However, it should in order to coordinate with <strong>the</strong> rest of <strong>the</strong><br />
hardware (and software).<br />
Workaround:<br />
The automatic hardware functionality to disable hardware battery brownout shutdowns once 5 V<br />
is connected must use VDD5V_GT_VDDIO instead of following <strong>the</strong> VBUSVALID_5VDETECT<br />
configuration. The developer should take this into consideration when developing <strong>the</strong> power<br />
protection scheme. At some point in <strong>the</strong> application, software handling of battery brownouts is<br />
enabled, and hardware battery brownouts are enabled, which makes <strong>the</strong> effects of this problem go<br />
away.<br />
<strong>Chip</strong> <strong>Errata</strong> <strong>for</strong> <strong>the</strong> i.<strong>MX23</strong>, Rev. 2<br />
18 Freescale Semiconductor
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