CKS32F103RBT6 ARM Cortex-M3 32-Bit Microcontroller 72MHz 128KB Flash LQFP-64

CKS32F103RBT6 Product Overview

The CKS32F103RBT6 is a mainstream 32-bit microcontroller from CKS, built on the ARM Cortex-M3 core running at up to 72MHz in a LQFP-64 (10×10mm) package. It integrates 128KB Flash, 20KB SRAM, 51 I/O pins, and 2× 12-bit ADCs (16 input channels) , operating from 2.0V to 3.6V over -40°C to +85°C. Critically, the CKS32F103RBT6 is hardware pin-to-pin compatible with the STM32F103RBT6, with most software code burning directly without modification, making it one of the most accessible Cortex-M3 options for domestic substitution. It also integrates 2×SPI, 2×I2C, 3×USART, CAN 2.0B, full-speed USB 2.0, seven timers, and a CRC unit, targeting smart home, industrial control, motor drive, consumer electronics, and security devices.

Typical Applications

Industrial control: PLCs, inverters, motor drives

Consumer electronics and handheld devices

Security systems and alarm devices

Smart home and IoT terminals

Medical equipment and PC gaming peripherals

Printers, scanners, and office equipment

Digital multimeters and instrumentation

Selection & Alternatives

The CKS32F103RBT6's direct benchmark is the STM32F103RBT6; the two are highly compatible in pinout, peripheral resources, and register-level behavior, with HEX files programmable directly, making it an ideal choice for STM32 localization. Within the same CKS32F103 family, the CKS32F103RET6 (LQFP-64) offers larger Flash (512KB) and the CKS32F103R8T6 (LQFP-64) offers 64KB Flash, allowing flexible selection by program size. For cross-brand alternatives, GD32F103RBT6 and APM32F103RBT6 are also Cortex-M3 candidates, though pin and software compatibility should be verified individually. Selection should match Flash/RAM capacity, operating temperature range, and package; verify against CKS migration guides before substitution.

FAQ

Q: Can the CKS32F103RBT6 directly replace the STM32F103RBT6?
A: Yes. The CKS32F103RBT6 is pin-to-pin compatible with the STM32F103RBT6 in hardware and register-level compatible in software; most STM32 HEX files can be programmed and run directly, and development environments (Keil, IAR) and firmware libraries are reusable. For post-migration anomalies, check peripheral circuit parameters and supply voltage, and correctly configure Flash prefetch and wait states according to the system clock.

Q: What is the practical advantage of 5V-tolerant I/O?
A: All 51 GPIOs are 5V-tolerant, allowing direct interfacing with 5V-logic peripherals (sensors, relay drivers, legacy communication interfaces) without external level shifters, simplifying circuit design, saving BOM cost, and reducing PCB area.

Q: What development resources does CKS provide?
A: CKS offers the CKS32F103RBT6 DEV BOARD with schematics, PCB footprint libraries, 3D models, and example code downloadable from authorized platforms. The device supports Keil MDK and IAR EWARM, with FAE teams from the manufacturer and distributors providing selection, design review, and debugging support.

Q: How is the ADC performance?
A: Two 12-bit successive-approximation ADCs with 16 external input channels and 1μs conversion time, plus a 7-channel DMA controller supporting timer, ADC, SPI, I2C, and USART triggers, suitable for multi-channel synchronous sampling in motor control and data acquisition.

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