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update errata

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This commit is contained in:
Sebastien Bourdeauducq 2017-09-20 19:57:19 +08:00
parent 34ae0901ae
commit 7b10386907
1 changed files with 3 additions and 1 deletions
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hardware/errata.md
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@ -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