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v10.0.1.x for R2026a
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-21 Pin Mapping

-21 Pin Mapping — Reference information about the I/O module connector

Description

The -21 I/O interface extension converts the rear I/O lines from LVCMOS to 3.3 V/5 V TTL and makes them accessible from the front of the enclosure. The -21 extension provides 56 TTL I/O lines. The I/O lines are distributed in 7 groups of 8 lines. All 8 lines of a group must have the same direction and pull resistor configuration. The pull resistors of the 7 I/O port groups can be configured using the mask of the Setup block.

Pin Mapping -21

PinSignalTransceiverPort PinSignalTransceiverPort
1 Configurable I/O functionalityTTL1 35 Configurable I/O functionalityTTL5
2 Configurable I/O functionalityTTL36 Configurable I/O functionalityTTL
3 Configurable I/O functionalityTTL37 Configurable I/O functionalityTTL
4 Configurable I/O functionalityTTL38 Configurable I/O functionalityTTL
5 Configurable I/O functionalityTTL39 Configurable I/O functionalityTTL
6 Configurable I/O functionalityTTL40 Configurable I/O functionalityTTL
7 Configurable I/O functionalityTTL41 Configurable I/O functionalityTTL
8 Configurable I/O functionalityTTL42 Configurable I/O functionalityTTL
9 Ground43 Ground
10 Configurable I/O functionalityTTL244 Configurable I/O functionalityTTL6
11 Configurable I/O functionalityTTL45 Configurable I/O functionalityTTL
12 Configurable I/O functionalityTTL46 Configurable I/O functionalityTTL
13 Configurable I/O functionalityTTL47 Configurable I/O functionalityTTL
14 Configurable I/O functionalityTTL48 Configurable I/O functionalityTTL
15 Configurable I/O functionalityTTL49 Configurable I/O functionalityTTL
16 Configurable I/O functionalityTTL50 Configurable I/O functionalityTTL
17 Configurable I/O functionalityTTL51 Configurable I/O functionalityTTL
18 Configurable I/O functionalityTTL352 Configurable I/O functionalityTTL7
19 Configurable I/O functionalityTTL53 Configurable I/O functionalityTTL
20 Configurable I/O functionalityTTL54 Configurable I/O functionalityTTL
21 Configurable I/O functionalityTTL55 Configurable I/O functionalityTTL
22 Configurable I/O functionalityTTL56 Configurable I/O functionalityTTL
23 Configurable I/O functionalityTTL57 Configurable I/O functionalityTTL
24 Configurable I/O functionalityTTL58 Configurable I/O functionalityTTL
25 Configurable I/O functionalityTTL59 Configurable I/O functionalityTTL
26 Ground 60 Ground
27 Configurable I/O functionalityTTL461 ReservedTTL 
28 Configurable I/O functionalityTTL62 ReservedTTL
29 Configurable I/O functionalityTTL63 ReservedTTL
30 Configurable I/O functionalityTTL64 ReservedTTL
31 Configurable I/O functionalityTTL65 ReservedTTL
32 Configurable I/O functionalityTTL66 ReservedTTL
33 Configurable I/O functionalityTTL67 200 mA fused +5 VTTL
34 Configurable I/O functionalityTTL68 200 mA fused +5 VTTL