AN 265: Using Altera MAX Series as Microcontroller I/O Expanders

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ID 683386
Date 9/22/2014
Public
Document Table of Contents
Document Table of Contents x
1. Using Altera MAX Series as Microcontroller I/O Expanders
1. Using Altera MAX Series as Microcontroller I/O Expanders x
1.1. Advantages of Using Altera Devices as I/O Expanders 1.2. Microcontroller I/O Expander Implementation 1.3. Microcontroller I/O Expander Configuration 1.4. Resource Usage in Microcontroller I/O Expander Target Devices 1.5. Microcontroller I/O Expander Design Verification 1.6. Microcontroller I/O Expander Application 1.7. Document Revision History
1.2. Microcontroller I/O Expander Implementation x
1.2.1. Pin Functions in the Microcontroller I/O Expander 1.2.2. Functional Description of the Microcontroller I/O Expander
1.5. Microcontroller I/O Expander Design Verification x
1.5.1. Simulating Microcontroller I/O Expander Write Mode Timing 1.5.2. Simulating Microcontroller I/O Expander Read Mode Timing
1. Using Altera MAX Series as Microcontroller I/O Expanders

1.2. Microcontroller I/O Expander Implementation

The I/O expander in this design example includes four ports—A, B, C, and D:

  • You can program each port independently as I/O ports.
  • Each port is 8 bits wide.
  • Each port is bidirectional and acts as input port if tri-stated.
  • To perform read and write operations, connect any of these ports with the microcontroller unit (MCU) port.
Figure 1. Block Diagram of Microcontroller I/O Expander Design Example



Section Content
Pin Functions in the Microcontroller I/O Expander
Functional Description of the Microcontroller I/O Expander

Level Two Title