From a4fd79c66b07558db79acaf9f835c3205023df5a Mon Sep 17 00:00:00 2001
From: tuxuser <462620+tuxuser@users.noreply.github.com>
Date: Sat, 6 Jan 2024 02:33:22 +0100
Subject: [PATCH] rf-unit: Connections from FPC -> ISD chip

---
 docs/rf-unit.md | 22 +++++++++++++---------
 1 file changed, 13 insertions(+), 9 deletions(-)

diff --git a/docs/rf-unit.md b/docs/rf-unit.md
index a6be8ba..42b513b 100644
--- a/docs/rf-unit.md
+++ b/docs/rf-unit.md
@@ -55,20 +55,24 @@ Pinout
 
 Pinout
 
-| Pin | Function |
-| ----| ---------|
-| 1   |  Power   |
-| 2   |  Power   |
-| 3   |  -       |
-| 4   |  -       |
-| 5   |  -       |
-| 6   |  Eject   |
-| 7   |  Eject   |
+| Pin | Function | ISD9160F Pin |
+| ----| ---------| -------------|
+| 1   |  Power   |            9 |
+| 2   |  Power   |            8 |
+| 3   |  -       |             -|
+| 4   |  -       |             -|
+| 5   |  -       |             -|
+| 6   |  Eject   |            7 |
+| 7   |  Eject   |            6 |
 
 Bridge the respective pins briefly to trigger action.
 
+FPC Cable / capacitive front panel buttons are directly wired to the ISD-Chip.
+
 #### Nuvoton Soundcorder chip (U4)
 
+Responsible for playing the power-on/off and eject sounds.
+
 Model: ISD9160F
 
 I2C address: `0x5A`