diff --git a/Clock Port.md b/Clock Port.md
index bc5670a..43248fb 100644
--- a/Clock Port.md	
+++ b/Clock Port.md	
@@ -6,3 +6,9 @@ include_toc: true
 # Clock Port
 
 The Sentinel 65X clock port is a small, 28-pin female pin header on the mainboard, which exposes the system's debug serial line, I2C bus, reset and main interrupt lines, `PHI2` clock signal, and a 64-address memory-mapped I/O region, mapped to memory beginning at `0x00DFC0`. This region of uncommitted expansion is reserved for the use of user-installed clock port accessories.
+
+## Pinout
+
+| Pin | Label | | Label  | Pin |
+| :-- | :----:| | :----: | --: |
+| 1   |  GND  | | +3.3V  | 2   |