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splitkb · Dec 1, 2023 · 854036e · 854036e
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diff --git a/specification/card_identification/index.md b/specification/card_identification/index.md
@@ -9,6 +9,9 @@ nav_order: 4
 # Card Identification
 Myriad uses EEPROM chips placed on the card to allow identification of the card inserted. This allows the keyboard to automatically configure the card for use, allowing for a seamless no-code experience.
 
+{: .note }
+Automatic identification doesn't make sense for all cards. For example, a breakout board does not have fixed functionality, so it should not have an EEPROM chip and [pin 67](../pinout.html#module-presence) should be left floating.
+
 # EEPROM Selection and Addressing
 The Myriad ecosystem use standard 2kb-16kb I²C EEPROM chips, such as the [Zetta ZD24C16A](https://datasheet.lcsc.com/lcsc/2109141830_Zetta-ZD24C08A-STGMT_C2896640.pdf). They use the address range `1010 000X` - `1010 111X`.
 

diff --git a/specification/pinout.md b/specification/pinout.md
@@ -84,6 +84,9 @@ The Myriad module and keyboard share an active-low Reset signal. This can be use
 ### Module Presence
 All [identifiable](card_identification/) Myriad cards **must** short Module Presence to Ground to indicate that a card has been inserted. Leave it floating for cards which cannot be automatically identified.
 
+{: .note }
+Automatic identification doesn't make sense for all cards. For example, a breakout board does not have fixed functionality, so it should not have an EEPROM chip and the Module Presence pin should be left floating.
+
 ### Signals
 
 |\#| Pin |