From 5131f81a73f62890e1fcacbb93522734bf82ffc0 Mon Sep 17 00:00:00 2001 From: jess b Date: Mon, 3 Oct 2011 09:11:36 -0700 Subject: Add power information to hardware pages. Squash from v0.0.12-maintenance: Power information additions. Expanded the section "Powering the Maple", added a new "Power Regulation on the Maple" section. Power info updated for MN and Mini RET6 power info update Fixed broken link. Had wrong link to datasheet for MCP1703. maple-native-beta: 80-column cosmetic fix Signed-off-by: Marti Bolivar --- source/hardware/maple-ret6.rst | 31 ++++++++++++++++++++++++------- 1 file changed, 24 insertions(+), 7 deletions(-) (limited to 'source/hardware/maple-ret6.rst') diff --git a/source/hardware/maple-ret6.rst b/source/hardware/maple-ret6.rst index d5bf049..21c033b 100644 --- a/source/hardware/maple-ret6.rst +++ b/source/hardware/maple-ret6.rst @@ -58,9 +58,20 @@ standard Maple `. .. warning:: The RET6 Edition silkscreen falsely indicates that the barrel jack accepts up to 18 V. We recommend a barrel jack input - voltage **no greater than 12 V**. + voltage **no greater than 12V**, and potentially even lower + depending upon the current draw requirements of the + application. The same goes for powering off LiPo batteries. - See :ref:`this erratum ` for more information. + Please see :ref:`Power Regulation on the Maple + ` for more information. + +.. _maple-ret6power-regulation: + +Power Regulation on the Maple RET6 +---------------------------------- + +Power regulation on the Maple RET6 works in the :ref:`same way as the +standard Maple `. Using the Built-in Battery Charger ---------------------------------- @@ -373,11 +384,17 @@ features only available on the STM32F103RET6. .. _maple-ret6-barrel-jack: -* **Barrel jack power supply voltage mistake**: The silkscreen next to - the barrel jack connector incorrectly indicates that up to an 18 V - input voltage is allowed. **We do not recommend exceeding 12 V**. - - See this :ref:`Maple erratum ` for more +* **Barrel jack power supply voltage mistake**: The acceptable voltage + range given next to the barrel jack on the Maple RET6 is + **incorrect**. The given range is 7V — 18V. In fact, **18V is too + high** and should not be supplied to your board. The original + voltage regulators used on the Maple were rated up to 18V. However, + the voltage regulators on current Maple Revs are rated up to only + 16V, and due to the current draw requirements of the board, operate + properly only up to 12V. The recommended maximum voltage you should + apply is **12V**, and potentially even lower depending upon the + current draw requirements of the application. Please see :ref:`Power + Regulation on the Maple ` for more information. * **Power supply marketing mistake**: We originally sold the Maple -- cgit v1.2.3