Accessible pinout for MC6843

Part description: Floppy Disc Controller, DIP-40

Package description: This package has two parallel rows of pins extending down from opposite edges of the chip.

There should be a semicircular notch that you can feel in the middle of one of the package's shorter bare edges. With the pins facing downward and the chip oriented so notch is on the side of the chip furthest from you, Pin 1 will be in the far left corner of the chip.

Pins are numbered counter-clockwise. Numbers increase from the far left corner to the near left corner. They then continue on the right side, increasing from the near right corner to the far right corner. Thus the highest number pin is to the right of pin 1.

Pin assignments

Left side (numbering starts at far end)

Pin Signals
1VSS
2VSS
3FIR
4FI
5WPT
6WGT
7RESET (active low)
8HDR
9DCK
10LCT
11IDX
12CLK
13RDY
14VFOC
15STP
16HLD
17RS2
18RS1
19RS0
20VCC

Right side (numbering starts at near end)

Pin Signals
21TxAck
22R / W (active low)
23E
24CS (active low)
25BD
26D7
27D6
28D5
29D4
30D3
31D2
32D1
33D0
34NC
35NC
36TxRQ
37IRQ (active low)
38RDT
39WDT
40TRZ

This pinout was automatically generated from the KiCAD symbol library revision 164574.

It is possible that there may be a mistake in the source data leading to wrong information on this page.