ESP302 Controller
Start-Up Manual
A1270B1 - EDH0411En1021 – 02/20
32
6.0
Appendix B: General I/O Description
This chapter briefly describes all ESP302 signal types and details each of the ESP302
connector interfaces.
6.1
Digital I/O’s
All digital I/Os are TTL compatible:
•
All digital I/Os are not isolated, but are referenced to electrical ground (GND).
•
Input levels must be between 0 V and +5 V.
•
Output levels are +5 V.
All digital I/Os are refreshed asynchronously on user requests. Therefore, digital inputs
or outputs have no refresh rate.
Typical delay is a few
μ
s due to priorities made to other functions.
For firmware compatibility reasons, I/Os are grouped in two busses (GPIO1 and
GPIO2), each bus can be configured independently in input or output mode (default
input).
6.1.1
GPIO Connector
GPIO
NOTE
Mating connector: Male SUB-D26HD with UNC4/40 lockers.
GPIO
Pin #
Function
Pin #
Function
1
+5 V (fused: max 100 mA)
14
GND
2
GPIO1.DI1 or GPIO1.DO1
15
GND
3
GPIO1.DI2 or GPIO1.DO2
16
GND
4
GPIO1.DI3 or GPIO1.DO3
17
GND
5
GPIO1.DI4 or GPIO1.DO4
18
GND
6
GPIO1.DI5 or GPIO1.DO5
19
GPIO2.DI1 or GPIO2.DO1
7
GPIO1.DI6 or GPIO1.DO6
20
GPIO2.DI2 or GPIO2.DO2
8
GPIO1.DI7 or GPIO1.DO7
21
GPIO2.DI3 or GPIO2.DO3
9
GPIO1.DI8 or GPIO1.DO8
22
GPIO2.DI4 or GPIO2.DO4
10
GND
23
GPIO2.DI5 or GPIO2.DO5
11
GND
24
GPIO2.DI6 or GPIO2.DO6
12
GND
25
GPIO2.DI7 or GPIO2.DO7
13
GND
26
GPIO2.DI8 or GPIO2.DO8
Figure 17: GPIO connector.
