ESH10000568 - MPIO-96 SPI Module

Overview

The ESH10000568 is a multi-purpose I/O module providing 96 bidirectional analog/digital channels with SPI-based control for flexible signal routing and measurement.

Description

The MPIO-96 SPI module provides 96 configurable I/O channels organized into 12 groups of 8 channels each. Each channel can be independently configured as analog input, analog output, or pseudo-digital I/O, making this module ideal for flexible signal routing and multi-channel data acquisition.

Key Features:

• 96 Bidirectional Channels: Configurable as analog or pseudo-digital I/O

  • 12-bit ADC resolution (2x range mode)
  • 12-bit DAC resolution (2x range mode)
  • Pseudo-digital mode with programmable VL/VH thresholds
  • Support for open-drain and floating output emulation

• Flexible Configuration: Per-channel direction control

  • Bidirectional capability (IN | OUT)
  • Default direction: IN
  • Runtime direction switching for pseudo-digital outputs

• High-Speed Acquisition: Numeric result support

  • Multi-channel synchronized sampling
  • Configurable sample rates
  • Optional data reduction

• Calibration Support: Per-channel gain and offset calibration

  • Persistent calibration storage
  • Automatic calibration application

Hardware Details

Multi-Function I/O:

• Chip: Analog Devices AD5592R (12 chips)
• Channels per chip: 8
• Total channels: 96
• Resolution: 12-bit ADC/DAC
• Communication: SPI bus @ 10 MHz
• Voltage range: 2x mode (0-5V typ.)

GPIO Expander:

• Chip: NXP PI4IOE5V6416
• Purpose: Chip select routing, reset control
• I²C Address: 0x20

Channel Naming Convention

Channels follow the pattern: {ModuleIndex}.ESH10000568.MPIO{00-95}

Example: Module at position 1, channel 42 would be: 1.ESH10000568.MPIO42

User-Accessible Channels

Total User Channels: 98 (96 MPIO + NumericResult + CALIBRATION)

Special Features

Open-Drain Emulation

Pseudo-digital outputs support open-drain emulation:

• Set VH < 0 to enable open-drain mode
• Logic HIGH: Channel set to INPUT (high-impedance)
• Logic LOW: Channel drives VL voltage

Float Emulation

Pseudo-digital outputs support floating output:

• Set VL < 0 to enable float mode
• Logic LOW: Channel set to INPUT (high-impedance)
• Logic HIGH: Channel drives VH voltage

Best Practices

1. Bidirectional channels: Always configure direction before use
2. Voltage range: AD5592R operates in 2x mode (0-5V typical, check datasheet)
3. Open-drain/float: Use negative VH/VL values for special output modes
4. Batch operations: Configure channels in groups for better performance
5. Calibration: Apply calibration after hardware changes or environmental shifts

Document Version: 1.5
Last Updated: December 2024
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