--- a/doc/CP2102-EEPROM-format	Thu Sep 28 05:25:39 2023 +0000
+++ b/doc/CP2102-EEPROM-format	Thu Sep 28 05:39:44 2023 +0000
@@ -14,6 +14,13 @@
   fixed area allocated for it, no pointer-to-string scheme like in FTDI's
   EEPROMs;
 
+* Unlike FTDI EEPROMs, CP2102 EEPROM is most certainly NOT optional - a blank
+  or garbage-filled EEPROM will result in a non-functional chip;
+
+* There is no checksum - because there is nothing for the chip to "fall back"
+  on when the EEPROM is bad, there is no point in checking the EEPROM content
+  for validity;
+
 * The logical structure of CP2102 EEPROM is byte-oriented - no 16-bit words as
   elementary units.
 
@@ -72,9 +79,9 @@
 
 Address 0x37FF, 1 byte:
 
-	Python cp210x package notes indicate that this byte holds the part
-	number, presumably the one returned by the vendor-specific command that
-	retrieves it.  This aspect remains to be tested at FreeCalypso HQ.
+	Part number code 0x02 for CP2102.  The chip returns this EEPROM byte
+	when queried (via CP210x family-specific command) for its part number,
+	as in cp2102-read-partno.
 
 Address 0x3800, 4 bytes: