AVR128DA32S-I/PT

Overview

The AVR128DA32S-I/PT is an 8-bit microcontroller from the AVR DA(S) family, featuring a 32-pin TQFP package. It integrates 128 KB of Flash memory, 16 KB of SRAM, and 512 B of EEPROM. The device operates at a maximum frequency of 24 MHz with a supply voltage range of 1.8 V to 5.5 V. Key peripherals include a 12-bit ADC with 14 channels, three analog comparators, one DAC, and up to five 16-bit Timer/Counter type B units. It supports industrial temperature ranges (-40°C to +85°C) and includes the Program and Debug Interface Disable (PDID) feature for enhanced security.

Feature Summary

• Integrates the Program and Debug Interface Disable (PDID) mechanism to prevent unauthorized access to reprogrammable Flash memory via the UPDI interface.
• Features a Peripheral Touch Controller (PTC) supporting self-capacitance and mutual capacitance channels for touch sensing applications.
• Includes an Event System that enables CPU-independent inter-peripheral signaling for predictable system operation.
• Provides Configurable Custom Logic (CCL) with programmable Look-up Tables to implement custom digital logic functions.

Applications

• Secure firmware upgrade implementations requiring code authentication and protection against remote attacks.
• Industrial control systems utilizing capacitive touch interfaces for user input.
• Power control applications leveraging the 12-bit Timer/Counter type D optimized for power management.
• General-purpose embedded designs requiring robust analog features such as window compare functions in analog comparators.

Procurement Notes

Verify the specific ordering suffix 'S' confirms the inclusion of the PDID feature, which distinguishes this variant from standard devices without this security capability. Confirm the '-I' designation aligns with the required industrial operating temperature range of -40°C to +85°C for your application environment. Ensure compatibility with the TQFP-32 package dimensions during PCB layout. Cross-reference the datasheet DS40002183E for final pinout and electrical specifications before procurement.

Selection Notes

Select this component when vertical migration within the AVR DA(S) family is required without code modification. Choose this part if the application demands the specific combination of 128 KB Flash and 16 KB SRAM in a 32-pin form factor. Consider this device for designs needing the PDID security feature integrated directly into the MCU. Evaluate the peripheral count, specifically the number of available ADC channels and timers, against the system requirements to ensure sufficient resources.

Part Context

This device belongs to the AVR128DA28/32/48/64(S) series, designed for flexible low-power architecture. The family allows horizontal migration to reduce pin counts or vertical migration to increase features while maintaining pin and feature compatibility. The 'S' suffix indicates the presence of the PDID security feature, differentiating it from non-security variants within the same pin count and memory configuration.

Replacement Considerations

AVR128DA32-E/PT

FAQ

What is the function of the PDID feature in the AVR128DA32S?

The Program and Debug Interface Disable (PDID) prevents access to the device's reprogrammable Flash memory over the Unified Program and Debug Interface (UPDI), protecting against unauthorized code modification.

How many general purpose I/O pins are available on the AVR128DA32S?

The AVR128DA32S provides up to 27 general purpose I/O pins, with PF6/RESET being input-only.

What is the maximum operating frequency of the AVR128DA32S?

The AVR128DA32S can run at a maximum clock frequency of 24 MHz using the High-Precision internal high-frequency Oscillator (OSCHF).