1 files changed, 12 insertions, 0 deletions
diff --git a/sw/pio.txt b/sw/pio.txt
index 626404a..dbc1206 100644
--- a/sw/pio.txt
+++ b/sw/pio.txt
@@ -22,6 +22,9 @@ CW paddle
  * CW_TIP  PB8
  * CW_RING PB9
 
+CW output
+ * Sidetone PA8 (TIM1 CH1)
+
 Microphone switches
  * SW1 PA3 ADC12_IN3
  * SW2 PA4 ADC12_IN4
@@ -44,3 +47,12 @@ Microphone switches
 
  * SCL   PB10   default alternate function
  * SDA   PB11   default alternate function
+
+## Timers
+
+TIM1 is an advanced control timer, TIM2,3,4 are general purpose
+
+ * TIM1 CW Sidetone PWM output
+ * TIM2 Clock timer
+ * TIM3 QEI decoder
+ * TIM4