Serial Mouse Pinout [top] (Limited Time)

Save this guide. When you find a box of old ball mice in your grandparents’ attic, you’ll know exactly how to breathe life back into them.

The is a beautiful example of late-20th-century engineering pragmatism. Using only four active lines (GND, +Power, Data), engineers created a device that served humanity for nearly two decades. While USB has rendered this pinout obsolete for general consumers, the DE-9 serial mouse remains a vital tool for retro gamers, CNC machine operators, and embedded system developers. serial mouse pinout

1 - CD (Unused) 2 - RXD (Data Out to PC) ← MOST IMPORTANT 3 - TXD (Data In - Unused) 4 - DTR (+5V to +12V POWER) ← REQUIRED 5 - GND (Ground) ← REQUIRED 6 - DSR (Unused) 7 - RTS (+5V to +12V POWER) ← REQUIRED 8 - CTS (Unused) 9 - RI (Unused) Save this guide