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Jan 18, 2018 · Major differences are the execution speed and flash size. The chip is capable of running a much higher clockfrequency (108MHz) and have less waitstates for flashrom then the ST counterpart. The size of the flash memory goes up to 3076KB, compared to the 1024KB ST offers.
- STM32
- GD32
- Apm32
- Blm32
- CS32
- HK32
- Mm32
Availability: all major distributors Update 2020-06-13: Link to die shots. The STM32F103, it is a popular microcontroller. Especially since the availability of the so-called BluePill boards from eBay/AliExpress, this MCU is used a lot in the hobby scene. This is how I was introduced to this chip. I was looking for some microcontroller board with an ARM chip, I searched eBay, and I found a BluePill. The STM32F103 was introduced in 2007. It is a rather old part, from the time Cortex-M just star...
Availablity: LCSC, TME , rotakornand others Update 2020-06-13: Link to die shots. This is the first “clone” I was aware of. GigaDevice has been around for many years. They have an English website, with datasheets, reference manuals, errata, SDKs. The content on this website gets updated. Is the GD32F103CBT6 a drop-in replacement for the STM32F103CBT6? Not 100%. The GD32 has a minimal voltage of 2.6, while the STM32 has a minimum voltage of 2.0 Volt. So there are cases where the GD32F103 won’t...
Availability: LCSC Update 2020-06-13: Link to die shots. When looking for documentation and development libraries, I encountered a problem: The website where this content supposed to be is unavailable. The main website appears to work, but when I click microcontrollers, I get to their Chinese website. It has some rendering issues, but the main page appears to load. From there, I see among the Chinese characters “APM32”. So, I click that, and then I get an “Error 522” from a Chinese variant of...
Availability: Discontinued at LCSC Update 2020-06-13: Link to die shots. I’ve initially found and ordered this part on LCSC June 2019. In November 2019 LCSC lists this part as discontinued. This does not necessarily mean the actual part is discontinued at the manufacturer, only that LCSC is no longer distributing it. Nevertheless, this means the part is hard to get. (at least in the west) It is also hard to find their website. Just googling for their company name won’t get you there. I found...
China Key System & Integrated Circuit Co., Ltd
Update 2020-06-13: Link to die shots. Availability: I haven’t seen this part on any resellers websites (such as LCSC), Update 2020-06-13: They are now being sold at LCSC On AliExpress, and there are few sellers. I’ve bought by part from WAVGAT The Website URL http://www.cksic.com is mentioned on https://www.eevblog.com/forum/beginners/unexpected-idcode-flashing-bluepill-clone/. This website looks more like it belongs to a semiconductor manufacturer, but as stated in that forum thread, it does...
Availability: LCSC Update 2020-06-13: Added this part. Link to die shots. This part wasn’t available yet when I first wrote the article. A while ago, it showed up at LCSC, and I’ve ordered some. The website hardly loads when accessed from Europe. Using a VPN with an Asian endpoint, the website loads. I’ve been able to locate the datasheets and user manuals. Even though the documentation is only in Chinese, the register maps are available.
Availability: LCSC Update 2020-06-13: Link to die shots. They have an English part on their website. They have Datasheets (global overview) and User Manuals (describing the registers) as well as libraries and samples. They’re easy to find, just click the “Download” button on their website. There are multiple revisions of various documents available, indicating they’re getting updated. According to the datasheet, we have a operation voltage of 2.0 to 5.5 Volt, and a maximum speed of 168 MHz. I...
Jan 19, 2018 · They are a full featured 32 bit ARM Cortex M3 chip running at max. 72MHz with all the requisite peripherals like ADC, DAC, USB, CAN, I2C, I2S, SPI, SDIO, PWM, RTC, interrupts and various timers. Lets zoom into the STM32F103C8 chip (which seems the be the go-to choice of the Chinese el-cheapo development breakout boards)
Jan 31, 2018 · For the STM32F103 vs GD32F103 challenge I needed to have two identical boards with a different microcontroller. As far as I could judge both chips are legit and not counterfeits as we bought both chips from (different) reputable sellers. The used chips are GD32F103CBT6 and STm32F103CBT7.
Mar 9, 2016 · The GD32F103xx device incorporates the ARM Cortex-M3 32-bit processor core operating at 108 MHz frequency with Flash accesses zero wait states to obtain maximum efficiency. It provides up to 3 MB on-chip Flash memory and up to 96 KB SRAM memory. Read more.
Mar 15, 2018 · Since the GD32F103 can run as fast as 108MHz but has not a proper USB clock divider to provide a 48MHz clock for USB communication we need another way to communicate with the outside world. Since the early days of computing the easiest way to go is a asynchronous serial interface using the UART peripheral.
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The GD32F103 is the product line that introduces CAN2.0B, USB FS, I2S and SDIO support within the GD32F10x product series. Its main frequency is up to 108MHz, and it supports up to 3072KB Flash and 96KB SARM. It also integrates USART+UART, I2C, SPI, EXMC (External Memory Controller) as well as other digital and analog peripheral resources.
