HS32F103C8T6
ARM Cortex-M3 MCU, 64KB Flash, 20KB SRAM, 72MHz, LQFP48 package with rich peripherals including USB and CAN.
Product Overview
Description
The HS32F103C8T6 is a high-performance 32-bit microcontroller based on ARM Cortex-M3 core operating at 72MHz.
It features 64KB Flash memory and 20KB SRAM, providing sufficient resources for industrial and consumer applications.
Rich peripheral set includes USB 2.0 full-speed, CAN 2.0B, 2x I2C, 3x USART, 2x SPI, and 2x 12-bit ADC.
Product Series
HS
Primary Application
Industrial control systems
Key Features
- 72MHz ARM Cortex-M3 core with single-cycle multiply and hardware divide
- 64KB Flash memory with 100,000 erase/write cycles
- 20KB SRAM for data and stack
- USB 2.0 full-speed device/host/OTG controller
- CAN 2.0B interface with baud rates up to 1Mbps
- 2x 12-bit ADC with 16 channels, 1μs conversion time
- 7-channel DMA controller for peripheral data transfer
- Wide operating voltage: 2.0V to 3.6V
Specifications
| Core | ARM Cortex-M3 |
|---|---|
| Frequency | 72 MHz |
| Flash | 64 KB |
| SRAM | 20 KB |
| GPIO | 37 |
| Package | LQFP48 |
Applications
Industrial control systems
Industrial automation and control
Consumer electronics
Consumer electronics
USB peripherals
Electronic system design
CAN bus networks
Communication and interface
Motor control applications
Motor drive and control systems
FAE Expert Insights
"The HS32F103C8T6 is an excellent choice for cost-sensitive applications requiring USB and CAN connectivity. In my experience supporting industrial customers, this MCU has proven to be a reliable drop-in replacement for STM32F103C8T6 with significant cost savings. The peripheral set is well-balanced for general embedded applications. I particularly recommend this part for CAN bus applications due to its robust CAN controller implementation. The 72MHz Cortex-M3 provides sufficient performance for most control tasks. For applications requiring higher pin count, consider the HS32F103RBT6 in LQFP64 package. Note that the ADC performance is good for general measurement but may require external conditioning for high-precision applications."
Cost-effective STM32 alternative with USB and CAN support
— Michael Chen, BeiLuo
Frequently Asked Questions
What is the maximum operating frequency of HS32F103C8T6?
The HS32F103C8T6 operates at a maximum frequency of 72MHz using the ARM Cortex-M3 core. The clock source can be derived from: 1) Internal 8MHz RC oscillator (HSI) - factory trimmed to ±1% accuracy; 2) External 4-16MHz crystal/ceramic resonator (HSE) - required for USB operation; 3) PLL - can multiply HSI or HSE up to 72MHz. For USB applications, HSE must be 8MHz or 12MHz to generate accurate 48MHz USB clock. The core can run at lower frequencies (down to 8MHz) to reduce power consumption. Flash wait states must be configured based on operating frequency: 0 wait states up to 24MHz, 1 wait state up to 48MHz, 2 wait states up to 72MHz. The 72MHz frequency provides 1.25 DMIPS/MHz performance, suitable for real-time control and communication applications.
Use 72MHz for maximum performance; reduce frequency and wait states for power-sensitive applications.
How do I program and debug HS32F103C8T6?
The HS32F103C8T6 supports programming and debugging through SWD (Serial Wire Debug) interface: 1) Debug interface - SWD uses 2 pins: SWDIO (PA13) and SWCLK (PA14); JTAG is also supported with 5 pins; 2) Programming tools - HS-Link (Hangshun debugger), ST-Link/V2, J-Link, or ULINK; 3) IDEs - Keil MDK-ARM, IAR Embedded Workbench, STM32CubeIDE with GCC; 4) Boot modes - System memory (factory bootloader via UART), Flash memory (user code), SRAM (debugging); 5) Programming methods - In-circuit programming via SWD, In-application programming (IAP) via UART/USB/CAN, and Bootloader mode for initial programming. For production programming, use SWD interface with a dedicated programmer. The factory bootloader supports programming via USART1 (PA9/PA10) with standard UART-to-USB converters. Flash protection features prevent unauthorized reading of programmed code.
Use SWD with HS-Link or ST-Link for development; use UART bootloader for field updates.
What are the ADC specifications of HS32F103C8T6?
The HS32F103C8T6 features two 12-bit SAR ADCs with the following specifications: Resolution - 12-bit (4096 levels); Conversion time - 1μs at 56MHz ADC clock (fastest mode); Input channels - 16 external channels (ADC1) + 2 internal channels (temperature sensor, internal reference); Input voltage range - 0V to VREF+ (typically 3.3V); Sampling rate - up to 1 Msps (million samples per second); Trigger sources - software, timer events, external interrupt; Operating modes - single conversion, continuous conversion, scan mode, discontinuous mode; DMA support - results can be transferred via DMA for high-speed acquisition; Temperature sensor - factory-calibrated for temperature monitoring; Reference voltage - internal 1.2V reference or external VREF. For best accuracy, use external VREF and add input filtering. The ADC performance is suitable for general measurement applications but may require signal conditioning for high-precision requirements.
Use single conversion for low-speed measurement; enable DMA for high-speed continuous acquisition.
How do I configure the USB peripheral on HS32F103C8T6?
Configuring USB on HS32F103C8T6 requires several steps: 1) Clock configuration - USB requires precise 48MHz clock; use external 8MHz or 12MHz crystal with PLL to generate 48MHz; 2) GPIO configuration - USB_DM (PA11) and USB_DP (PA12) are dedicated USB pins; No remapping is needed; 3) Peripheral initialization - enable USB clock in RCC, configure USB interrupt priority, initialize USB core; 4) Endpoint configuration - USB supports up to 8 bidirectional endpoints; configure endpoint type (control, bulk, interrupt, isochronous) and buffer size; 5) Firmware - use USB library (Hangshun USB Device Library or STM32 USB library); implement standard USB descriptors (device, configuration, interface, endpoint); 6) Pull-up - internal 1.5kΩ pull-up on USB_DP controlled by software for connection detection. Common USB classes supported: CDC (virtual COM port), HID (keyboard/mouse), MSC (mass storage), and custom devices. USB firmware requires approximately 8-12KB Flash depending on class implementation.
Use CDC class for virtual serial port; HID for simple data transfer; MSC for storage devices.
What are the CAN bus capabilities of HS32F103C8T6?
The HS32F103C8T6 includes one CAN 2.0B interface with these capabilities: Protocol - CAN 2.0B Active (supports 11-bit and 29-bit identifiers); Baud rates - configurable from 10kbps to 1Mbps; Message objects - 3 transmit mailboxes, 2 receive FIFOs (3 messages each), 28 scalable filter banks; Operating modes - initialization, normal, sleep, loopback, silent, silent loopback (test modes); Interrupts - transmit, receive, error, status change interrupts; Timestamp - message time stamping using internal timer; Error handling - automatic retransmission, error counting, bus-off recovery. For CAN communication, external CAN transceiver (e.g., TJA1050, SN65HVD230) is required to convert logic levels to differential CAN signals. CAN bus termination requires 120Ω resistor at each end of the bus. The CAN peripheral is suitable for industrial automation, automotive diagnostics, and distributed control systems. Bit timing configuration requires careful calculation based on system clock and desired baud rate.
Use 125-500kbps for industrial CAN; 1Mbps for automotive; add external transceiver and termination resistors.
What is the Flash memory endurance and retention of HS32F103C8T6?
The HS32F103C8T6 Flash memory has the following characteristics: Endurance - minimum 100,000 erase/write cycles per page; typical endurance exceeds 1,000,000 cycles; Retention - 30 years data retention at 85°C after 10,000 cycles; 10 years at 105°C; Page size - 1KB per page (64 pages total for 64KB); Erase time - 20-40ms per page; Programming time - 40-80μs per 16-bit word; Read access - 0 wait states up to 24MHz, 1 wait state up to 48MHz, 2 wait states up to 72MHz. Flash protection features: Read protection - 3 levels (none, memory read protected, full chip protected); Write protection - individual page write protection; Option bytes - store configuration data with same endurance as main Flash. For applications requiring frequent writes, implement wear leveling across multiple pages. Consider using external EEPROM or FRAM for data logging applications with very high write frequency. The Flash endurance is sufficient for firmware updates and configuration storage but may not suit high-frequency data logging.
Use wear leveling for frequent writes; consider external EEPROM for data logging exceeding 100K cycles.