// PCB Connectors

IDC 34-Pin Floppy Disk

The 34-pin IDC floppy disk interface supports up to two drives via a cable twist. Used in PCs from the 1980s through early 2000s.

// Specifications

Standard

PC floppy interface

Pitch

2.54mm

Pin Count

34 (2x17)

Status

Obsolete

// Pin Reference Table

Pin	Name	Function	Type
1	GND	Ground	GND
8	INDEX	Index signal spindle sync	I/O
10	MOTOR ENABLE A	Motor enable drive A	I/O
14	DRIVE SELECT A	Drive select A	I/O
18	DIR	Step direction	I/O
20	STEP	Step pulse	I/O
22	WRITE DATA	Write data	I/O
30	READ DATA	Read data	I/O
34	DISK CHANGE	Disk change	I/O