document nature of PT0

diff --git a/cebpic/README.circuitry b/cebpic/README.circuitry
index e96cd5ee6aff7b92b5410ea110cdd2f8f491fbac..51fbebc1798956a8100bcc5e374691addc09b183 100644 (file)
--- a/cebpic/README.circuitry
+++ b/cebpic/README.circuitry
@@ -190,11 +190,16 @@ not assume that the CDU remains charged if it is disabled.
 There is no need to disable the CDU while switching a set of points.
 While the CDU is disabled, it gradually discharges.
 
-    Point N pin              Effect
+    Point N pin        Effect
        H                Activated - point changes if CDU charged
        L                Not activated
        Z               Results not defined, do not use
 
+    Point 0 pin        Effect
+       L                Activated - point changes if CDU charged
+       H                Not activated
+       Z               Results not defined, do not use
+
     CDU Enable pin   Effect
        H               CDU is enabled (and charges up)
        Z               CDU is disabled (and discharges)