STMicroelectronics STEVAL-IAS001V1

Overview

STEVAL-IAS001V1 from STMicroelectronics is a security keypad demonstration board built around the ST7Lite39F2 8-bit microcontroller and STM1403 physical intrusion detection IC, featuring a 4×3 key matrix, three status LEDs (power, error, magnetic lock), on-board SPI EEPROM for event logging, RS232 interface for PC communication, and battery-backed intrusion detection jumpers - designed for low-cost home security door controller evaluation.

For engineers reviewing the STEVAL-IAS001V1 datasheet, STEVAL-IAS001V1 pinout, STEVAL-IAS001V1 application, or STEVAL-IAS001V1 equivalent, this board supports dual-mode operation (stand-alone user mode and PC-connected administrator mode via SCI/RS232), in-circuit programming capability, and real-time physical tamper detection with buzzer alert and non-volatile event storage.

Technical Context

The board implements a complete security keypad controller using the ST7Lite39F2 MCU for key scanning, LED control, EEPROM logging, and RS232 protocol handling, while the STM1403 provides dedicated hardware-level tamper detection with battery backup and alarm triggering. The system operates from 3.4 V to 19 V DC input and regulates to 3.3 V for logic.

Two operational modes are supported: user mode enables local keypad entry and LED feedback; administrator mode allows full configuration and event review via a PC GUI over RS232 using the ST3232 transceiver. Jumper-based intrusion sensors feed directly into STM1403 inputs, enabling immediate response without MCU intervention.

Key Specifications

Availability

STEVAL-IAS001V1 is available at Aetrix Electronics and suitable for security system prototyping, home automation controller development, and embedded access control evaluation requiring stable component supply and documented reference design integration.

Supply support for STEVAL-IAS001V1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, designing and manufacturing microcontrollers, power ICs, sensors, and analog/mixed-signal products for industrial, automotive, and consumer applications.

This board belongs to ST's STEVAL (ST Evaluation) series - purpose-built reference platforms that demonstrate real-world implementation of ST's microcontrollers and supporting analog components in cost-sensitive security and automation use cases.

FAQ

What firmware is preloaded on the ST7Lite39F2?

The ST7Lite39F2 comes pre-programmed with a complete keypad controller firmware supporting 4×3 matrix scanning, LED status indication (green power, red error, yellow magnetic lock), event logging to EEPROM, and RS232-based administrator mode communication - no initial flashing required for basic evaluation.

Can the board operate without a PC connection?

Yes - in stand-alone user mode, the board functions independently: keypad input is processed locally, LED feedback is provided, magnetic lock state is monitored, and tamper events trigger buzzer and error LED without any PC link or GUI dependency.

How is physical intrusion detection implemented?

Intrusion detection uses four jumper-based sensor inputs routed to the STM1403, which monitors open/closed states with battery backup (3 V coin cell). When a jumper is opened (indicating panel removal or case breach), STM1403 asserts an immediate alarm signal to drive the buzzer and error LED, independent of MCU execution.

Is in-circuit programming supported after board separation?

Yes - the board includes dedicated ICC (In-Circuit Communication) pins (CCDATA, CCCLK, RESET) compatible with ST's standard ICC debug interface, allowing full reprogramming and debugging of the ST7Lite39F2 even after disconnection from the auxiliary programming carrier board.