ARM processors

December 29, 2020

STM32H743 "horse pill" -- overview

The heart of this unit is the STM32H743ZIT6U.

480 Mhz ARM Cortex-M7
Cortex-M7 has FPU and an MPU
2M of flash, 1M of SRAM
10/100 ethernet with DMA
9 uart, 4 i2c, 6 spi
USB HS/FS and USB FS

It really does have 9 uarts (1,2,3,6 are usarts, 4,5,7,8 are uarts, and one is a special low power uart). Uart 4 is connected to the virtual console on the STLink.

The board also has a STM32F723IEK6 that runs STLink V3. This version of STLink supports USB HS (480Mb/s) as well as a second interface as a VCP (virtual console port). A micro USB port is provided for the STLink.

The board provides an RJ-45 for the ethernet and has an SMC 8742A for the Phy.
The board provides a Micro A/B for the HS/FS USB, and apparently a regular Micro USB works with this.

Even though it would make no sense to use it for anything other than running the STLink firmware, it is worth noting some of the specifications of the F723.

216 Mhz ARM Cortex-M7
512K of flash, 256K of SRAM
USB HS/FS with DMA

Feedback? Questions? Drop me a line!

Tom's Computer Info / tom@mmto.org