STMicroelectronics STM32F100ZET6B

Overview

STM32F100ZET6B from STMicroelectronics is a high-density value-line Arm® Cortex®-M3 MCU with 512 KB Flash, 32 KB SRAM, 24 MHz max CPU frequency, dual 12-bit DACs, and up to 112 I/Os in LQFP144 package - used in industrial HMI controllers requiring integrated analog I/O, real-time control, and LCD interface support.

For engineers reviewing the STM32F100ZET6B datasheet, STM32F100ZET6B pinout, STM32F100ZET6B application, or STM32F100ZET6B equivalent, key selection criteria include Flash/SRAM size, DAC channel count, FSMC support for external memory, LCD parallel interface capability, and 112-pin I/O scalability for complex peripheral routing.

Technical Context

The device integrates an Arm Cortex-M3 core with single-cycle multiply/hardware divide, supporting deterministic real-time execution. Its clock system includes dual oscillators (4–24 MHz HSE + 32.768 kHz LSE), programmable PLL, and factory-trimmed 8 MHz HSI for rapid startup without external crystals.

Peripheral architecture features a flexible static memory controller (FSMC) with four chip selects for SRAM/PSRAM/NOR, parallel LCD interface (8080/6800 modes), and 16 timers - including one advanced-control timer with 6-channel PWM, dead-time generation, and emergency stop - enabling motor control and display timing synchronization.

Key Specifications

Pinout & Package

LQFP144 (20 × 20 mm, 0.5 mm pitch) package with exposed thermal pad - optimized for thermal dissipation in industrial ambient temperatures up to 105°C and compatible with standard PCB assembly processes.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microcontroller applications.

Compared with STM32F103ZET6, the STM32F100ZET6B trades CPU speed for enhanced analog integration and memory interface flexibility; versus STM32F072ZBT6, it delivers higher peripheral density and deterministic real-time capability at moderate power cost.

Availability

STM32F100ZET6B is available at Aetrix Electronics and suitable for industrial HMI panels, smart energy meters, motor interface modules, and medical front-end systems requiring stable component supply, long-term lifecycle assurance, and qualified industrial-grade packaging.

Supply support for STM32F100ZET6B 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 devices for industrial, automotive, and consumer markets.

The STM32F100 Value Line targets cost-sensitive, high-volume embedded applications requiring rich peripheral integration - especially where LCD interfaces, analog I/O, and external memory expansion are essential design requirements.

FAQ

What is the maximum operating temperature range for STM32F100ZET6B?

The STM32F100ZET6B is rated for industrial temperature range: –40°C to +105°C. This is confirmed in Section 5.3.1 of the DS5944 Rev 11 datasheet, with thermal characteristics validated per Table 60. The LQFP144 package's θ_JA is 25°C/W, supporting reliable operation in enclosed enclosures with passive cooling.

Does STM32F100ZET6B support USB device functionality?

No, STM32F100ZET6B does not integrate a USB transceiver or USB controller. It lacks USB PHY and associated registers. However, it can interface with external USB-to-UART bridges (e.g., CP2102) or USB FS PHY chips via USART or GPIO-controlled handshaking, as noted in Section 2.2.17 of the datasheet.

Can the FSMC interface be used with SDRAM?

No, the FSMC in STM32F100ZET6B supports only asynchronous/synchronous SRAM, PSRAM, and NOR flash - not SDRAM. SDRAM requires dynamic refresh control and burst addressing not implemented in this FSMC version, as specified in Section 2.2.5 and Table 30–37 of DS5944 Rev 11.

Is the internal 8 MHz RC oscillator factory-trimmed for accuracy?

Yes, the internal 8 MHz HSI oscillator is factory-trimmed to ±1% accuracy across the full temperature and voltage range, as documented in Section 5.3.7 (Table 24) of DS5944 Rev 11. This enables reliable boot and clock source fallback without external crystal in non-precision timing applications.