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-rw-r--r--notes/dac.txt24
1 files changed, 19 insertions, 5 deletions
diff --git a/notes/dac.txt b/notes/dac.txt
index 9df0782..d027402 100644
--- a/notes/dac.txt
+++ b/notes/dac.txt
@@ -13,11 +13,25 @@ control, and timer events. We'll just use software triggering for now.
There is (obviously) DMA support for DAC output.
-There are noise output and triangle wave output features with variable
-amplitude.
-
-There are many additional modes to tigger output to both channels at the same
-time.
+There are noise (via LFSR) output and triangle wave output features
+with variable amplitude.
+
+There are eleven modes to trigger output to both channels at the same
+time, as follows:
+
+ - Independent trigger:
+ (1) No wave generation
+ (2) Same LFSR
+ (3) Different LFSR
+ (4) Same triangle
+ (5) Different triangle
+ - (6) Simultaneous software start
+ - Simultaneous trigger:
+ (7) Without wave generation
+ (8) Same LFSR
+ (9) Different LFSR
+ (10) Same triangle
+ (11) Different triangle
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