From 7b103869071e76db6e571dba217ea0f43fe2e093 Mon Sep 17 00:00:00 2001 From: Sebastien Bourdeauducq Date: Wed, 20 Sep 2017 19:57:19 +0800 Subject: [PATCH] update errata --- hardware/errata.md | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/hardware/errata.md b/hardware/errata.md index 7814d1b..c4a1ca4 100644 --- a/hardware/errata.md +++ b/hardware/errata.md @@ -20,6 +20,7 @@ Rev 1 * D504 should follow the schematics in its datasheet * R502 should be connected to VCC * R502 -> 240 ohm +* C500 -> 1nF * R234 -> 7.5k * Q104 -> DMN3404 * R114 -> 470 ohm @@ -27,7 +28,7 @@ Rev 1 * R227 -> 470 ohm * R228 -> 4.7k * review values of R226 and R113 -* C100 -> 100pF NP0 AVX +* C100 -> 47pF NP0 AVX, R107 -> 100K, C101 -> 0.1uF * use crystal type recommended by the MCU datasheet * 22k FBI current resistor -> 10k? * add connector for OLED display? @@ -37,3 +38,4 @@ Rev 1 * review choice of filament flyback output diode * invert LED position so that the Ethernet LED is closest to the connector * invert polarity of LEDs (Ethernet LED polarity cannot be programmed) +* Meanwell DC/DC is coupling noise into pA input