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Description
Waveshare Core405R, STM32F4 Core BoardOverview 1. Core405R is an STM32 MCU core board designed for STM32F405RGT6, supports further expansion. It is ideal for starting application development with STM32F family. 2. Minimal ready to run system, integrates clock circuit, USB control circuit, USB connector, 3. etc. 3. All the I O ports are accessible on the pin headers 4. JTAG SWD programming debugging interface 5. 2. 54mm header pitch, allowed to be plugged in your application board What has
Overview1. Core405R is an STM32 MCU core board designed for STM32F405RGT6, supports further expansion. It is ideal for starting application development with STM32F family.
2. Minimal ready-to-run system, integrates clock circuit, USB control circuit, USB connector, 3. etc.
3. All the I/O ports are accessible on the pin headers
4. JTAG/SWD programming/debugging interface
5. 2.54mm header pitch, allowed to be plugged-in your application board
What has On Board
1. STM32F405RGT6: The high performance STM32 MCU which features:
- Core: Cortex-M4 32-bit RISC
- Operating Frequency: 168MHz, 210 DMIPS/1.25 DMIPS/MHz
- Operating Voltage: 1.8V-3.6V
- Package: LQFP64
- Memories: 1MB Flash, 192+4kB SRAM
- MCU communication Interfaces:
-- 3 x SPI, 4 x USART, 2 x UART, 2 x I2S, 3 x I2C, 1 x SDIO, 2 x CAN
--1 x USB 2.0 HS/FS device/host/OTG controller with dedicated DMA, on-chip full-speed PHY
--1 x USB HS ULPI (external PHY required)
- AD & DA converters: 3 x AD (12-bit, 1μs, shares 16 channels); 2 x DA (12-bit)
- Debugging/Programming: supports JTAG/SWD (serial wire debug) interfaces, supports IAP
2. AMS1117-3.3: 3.3V voltage regulator
3. MIC2075-2: onboard USB power management device
4. Power supply switch, powered from 5Vin or USB connection
5. Boot mode selection, for configuring BOOT0 pin
6. Power indicator
7. VBUS LED
8. Reset button
9. 8M crystal
10. 32.768K crystal, for internal RTC with calibration
11. JTAG/SWD interface: for debugging/programming
12. USB connector, used for establishing USB communication between PC and the STM32 development board
13. MCU pins expander, VCC, GND and all the I/O pins are accessible on expansion connectors for further expansion
14. 5Vin pinheader, 5V power supply is required when using USB HOST/OTG
15. USB jumper
- Short the jumper when using USB
- Open the jumper to disconnect from related I/O port
16. VBAT selection jumper
- Short the jumper to use system power supply
- Open the jumper to connect the VBAT to external power, such as battery
Package Contents
1. Core405R x 1
2. USB type A to Mini-B cable x 1
3. Software CD x 1
Specification:
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Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.4 ★★★★★
Based on 5 reviews
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Product Reviews
★★★★★ 1
Poor quality control - maybe outlet store leftovers
Size: 11.5, Color: Burgundy Polished Full Grain
The two shoes were not the same size. They were both labeled 11 1/2 but one shoe was larger than the other and the fit was poor. I returned the first pair and ordered a replacement. This time the shoes were close to the same size but too loose and the left one has sewing issues. I've bought Johnston & Murphy for years because of the quality. These were to replace an existing pair of burgundy penny loafers that have finally worn out (even after several heal/sole replacements). That is the expected quality. I suspect Nashville Shoe Warehouse may be handling shoes that didn't measure up for the quality; more like an outlet mall than getting the J&M quality I've come to expect.
Update: went to Johnston & Murphy site to buy "direct" from the manufacturer. There were several recent reviews where the shoes were long and didn't fit properly. Genesco - please step up the manufacture / crafting of these classic shoes to the level of quality they used to have.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 21, 2025
★★★★★ 5
Really nice shoes
Size: 9, Color: Black Polished Full Grain
My husband enjoys wearing these shoes. Very classy looking. They fit well. They arrived quickly. He liked them so much he ordered another pair in a different color which have worked out just as well.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 3, 2026
★★★★★ 3
Way too narrow
Size: 9.5 Wide, Color: Burgundy Polished Full Grain
I ordered a wide in this shoe, but it was still way too narrow. I had to return them. Otherwise, it looked like a nice quality shoe.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 12, 2026
★★★★★ 5
I usually wear 11.5's, but I buy 1/2 size smaller to accommodate for stretch. Leather relaxes.
Size: 11, Color: Burgundy Polished Full Grain
5 STARS: These shoes are awesome. I keep coming back for more. I have major foot problems, have tried all kinds of shoes, orthotics, and inserts... but believe it or not, these shoes work better than any of that stuff. I wear them daily. I buy lots of them, for home, for church, and I'm getting my first pair of J&M boots today, for winters in Indiana... Brrrr
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 18, 2025
★★★★★ 5
Great price great shoe
Size: 12, Color: Burgundy Polished Full Grain
Excellent shoe. Tried the Sebago penny loafer and the sizing was ridiculous. These J and M are sized perfectly. I’ve had them before and they wear like iron. Very comfortable right out of the box.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 23, 2026
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