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AN2026 Pinout

Mon, 03/08/2010 - 21:37 — ansync

The 34 pin (2x17 pin) .1 spaced connector implements

  • 24 opto isolated outputs with a shared emitter 
  • 4 lines of 3.3V (hardware configurable to 1.1v) latching inputs with shared ground
  • 4 lines of 1.1v (hardware configurable to 3.3v) latching inputs with shared ground (from above)

This connector is similar to a vintage floppy drive interface

Pin number Signal
1 Common emitter for OPTO outputs
2 GND return for Latch inputs
3 Latch bit 7 - 3.3v
4 Latch bit 6 - 3.3v
5 Latch bit 5 - 3.3v
6 Latch bit 4 - 3.3v
7 Latch bit 3 - 1.1v - default active low
8 Latch bit 2 - 1.1v - default active low
9 Latch bit 1 - 1.1v - default active low
10 Latch bit 0 - 1.1v - default active low
11 Opto collector bit 23
12 Opto collector bit 22
13 Opto collector bit 21
14 Opto collector bit 20
15 Opto collector bit 19
16 Opto collector bit 18
17 Opto collector bit 17
18 Opto collector bit 16
19 Opto collector bit 15
20 Opto collector bit 14
21 Opto collector bit 13
22 Opto collector bit 12
23 Opto collector bit 11
24 Opto collector bit 10
25 Opto collector bit 9
26 Opto collector bit 8
27 Opto collector bit 7
28 Opto collector bit 6
29 Opto collector bit 5
30 Opto collector bit 4
31 Opto collector bit 3
32 Opto collector bit 2
33 Opto collector bit 1
34 Opto collector bit 0

 All latch signals pass through a programmable inversion register.  The 1.1v signals are re-configured to be active low (inverted) whereas the 3.3v signals are assumed to be active high.  These default settings can be changed using the AN2026 programmers API