Bit Configurable Gpio Daughter Card (With 12 Pin Phoenix Connector); Overview - HPE Edgeline EL300 Getting Started Manual

8 Bit Configurable GPIO Daughter Card (with
12 pin Phoenix Connector)

Overview

The HPE EL300 DIO daughter card adds 8 DIO ports for use. Each of the ports is isolated and thus
allowed to be designated as an input or output. These DIO ports are available through a Phoenix style 12
pin connector. The following illustration details how each port is connected:
Figure 1: 12 pin connector wire connections
Communication to these ports are accomplished through the I2C protocol. This is a serial protocol that is
popular and easy to use. It uses a single master that can have multiple slaves. When using this protocol,
the application has access to internal registers for interacting with the DIO. The command byte is
described below:
Command Byte
0x00
0x01
0x02
0x03
The input port register (command byte 0x00) reflects the incoming logic levels and only acts on the read
operation. The Output port register (command byte 0x01) shows the outgoing logic levels of the pins
Register
Input Port Register
Output Port Register
Polarity Inversion Register
Configuration Register

8 Bit Configurable GPIO Daughter Card (with 12 pin Phoenix Connector)

Protocol
Read byte
Read/write
Read/write
Read/write
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