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-rw-r--r--shared-bindings/index.rst9
1 files changed, 5 insertions, 4 deletions
diff --git a/shared-bindings/index.rst b/shared-bindings/index.rst
index ebea3c16a..2448a7820 100644
--- a/shared-bindings/index.rst
+++ b/shared-bindings/index.rst
@@ -1,9 +1,10 @@
-Shared Libraries
+Core Modules
========================================
-These core libraries are intended on being consistent across ports. Currently
-they are only implemented in the SAMD21 port but the ESP8266 support will soon
-follow.
+These core modules are intended on being consistent across ports. Currently
+they are only implemented in the SAMD21 and ESP8266 ports. A module may not exist
+in a port if no underlying hardware support is present. For example, a
+microcontroller without analog features will not have `analogio`.
.. toctree::
:glob: