STMicroelectronics EVALPRACTISPIN

Overview

EVALPRACTISPIN from STMicroelectronics is an evaluation board for the ST7226xGx series of 8-bit Flash microcontrollers, supporting SO28 and SDIP32 packages. It enables hardware validation of core peripherals including dual 16-bit timers, 10-bit ADC (6-channel), I²C, SPI, SCI, PLL clock multiplication, and enhanced low-voltage supervision - used in industrial sensor nodes and embedded control systems requiring in-circuit programming (ICP) and in-application programming (IAP).

For engineers reviewing the EVALPRACTISPIN datasheet, EVALPRACTISPIN pinout, EVALPRACTISPIN application, or EVALPRACTISPIN equivalent, this board provides direct access to all 22 I/O pins (including high-sink PAx/PAy ports), dedicated ICC programming interface (PA0/PA1/ICCSEL), oscillator inputs (OSC1/OSC2), reset control, and analog input channels (AIN0–AIN5) - critical for validating timing, power management, and peripheral coexistence in resource-constrained designs.

Technical Context

The EVALPRACTISPIN board interfaces with ST72260Gx/ST72262Gx/ST72264Gx MCUs via standard SO28 or SDIP32 footprints, supporting both ROM and XFlash variants (4 KB or 8 KB program memory, 256 B RAM). It exposes the full pin mapping including dual timer capture/compare lines (ICAP1_A/OCMP2_B), SPI bus (MOSI/MISO/SCK/SS), I²C (SCLI/SDAI), and SCI (RDI/TDO) signals - enabling real-time debugging of interrupt nesting, PWM generation, and synchronous/asynchronous serial communication.

Board-level features include on-board crystal oscillator (4 MHz or user-selectable), configurable LVD trip points (3 levels), PLL bypass capability, and support for all four power-saving modes (Halt, Active Halt, Wait, Slow) - allowing engineers to validate low-power firmware behavior under controlled supply conditions (2.7–5.5 V) across –40°C to +85°C operating range.

Key Specifications

Availability

EVALPRACTISPIN is available at Aetrix Electronics and suitable for industrial automation prototyping, sensor node development, and embedded control system validation requiring stable component supply and long-term toolchain continuity.

Supply support for EVALPRACTISPIN 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, Switzerland, specializing in microcontrollers, power management, sensors, and automotive ICs.

EVALPRACTISPIN belongs to ST's ST7 evaluation platform family, designed specifically to accelerate development of cost-sensitive 8-bit control applications - especially where Flash programmability, analog integration, and low-power operation are essential.

FAQ

Does EVALPRACTISPIN support ST72264Gx devices with I²C and SCI interfaces?

Yes. The board provides full pin access to PA4 (SCLI), PA6 (SDAI), PA5 (RDI), and PA7 (TDO), matching the ST72264Gx's I²C and SCI peripheral assignments as defined in Section 2 (Pin Description) of the ST7226xGx datasheet. No jumpering or modification is required to enable either interface.

Can EVALPRACTISPIN be used for in-application programming (IAP) verification?

Yes. The board routes PA0 (ICCCLK), PA1 (ICCDATA), and ICCSEL directly to header pins with proper pull-down on ICCSEL, satisfying the hardware requirements for IAP mode entry per Section 4.4 (ICC Interface) of the datasheet. Flash sector protection and write/erase cycle validation (10K cycles) can be tested using ST's official STVP software.

What is the maximum ADC input voltage range supported on EVALPRACTISPIN?

The board passes AIN0–AIN5 signals directly from MCU pins to test points without scaling or attenuation, preserving the device's native 0–VDD range. With VDD = 5.5 V, the full 10-bit ADC resolution (0–1023) maps to 0–5.5 V, consistent with electrical specification Section 13.12 (ADC Characteristics) and Figure 11.7 in the datasheet.

Is external crystal frequency configurable on EVALPRACTISPIN?

Yes. The on-board oscillator circuit uses a 4 MHz crystal by default but accepts user-replaced crystals or ceramic resonators (per Section 6.2 Multi-Oscillator). OSC1 and OSC2 pins are fully accessible via test points and support RC oscillator configuration using external resistor/capacitor networks as specified in Section 6.2 and Table 1 (Pin Description).