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--- en:arm:tqma53:linux:ptxdist:known_issues [2018/05/24 10:48] – ↷ Seite von en:arm:tqma53:linux:known_issues nach en:arm:tqma53:linux:ptxdist:known_issues verschoben liedmann
+++ en:arm:tqma53:linux:ptxdist:known_issues [2022/08/04 15:02] (current) – external edit 127.0.0.1
@@ Line 1: / Line 1: @@
 ~~NOCACHE~~
-<embed en:templates:tabs>
+<embed en:templates:tabs_ptxdist_bootstrap>
+  <label product_type>Embedded module</label>
+  <label build_system_head>PTXdist</label>
+  <label build_system>ptxdist</label>
   <label lang>en</label>
   <label mod_name>tqma53</label>
@@ Line 11: / Line 14: @@
 \\
 ===== Known Issues =====
+===== MBa53x ======
+==== RS485 ====
+^ RS485 bus block in half-duplex mode  ^^
+^ Affects   | RS485 via UARTx   |
+^ Issue     | During i.MX53 reset the UARTx.CTS# pin is low by default (CPU internal pull down)  |
+^ Effect    | Using the MBa53x RS485 circuitry in a half-duplex slave device or half-duplex multi-master environment may block the RS485 bus during i.MX53 reset.\\ The bus is released as soon as the UARTx.CTS# pin is properly configured by software (e.g. U-Boot, Linux, etc.)  |
+^ Solution / Workaround  | Add a 10k pull up to the UARTx.CTS# signal on carrier board  |
+----
 ==== eMMC drive strength  ====