diff options
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/stm32f1.md | 19 |
1 files changed, 8 insertions, 11 deletions
diff --git a/docs/stm32f1.md b/docs/stm32f1.md index 8472bd49..8a33f3b2 100644 --- a/docs/stm32f1.md +++ b/docs/stm32f1.md @@ -7,10 +7,9 @@ pin mappings either. General considerations ====================== -The STM32 port currently requires an 8 MHz crystal for correct -operation. The port is currently designed for and tested with -STM32F103xB series MCUs, but it should work with any STM32F103 series -MCUs with minimal changes. +The port is currently designed for and tested with STM32F103xB series +MCUs, but it should work with any STM32F103 series MCUs with minimal +changes. Unlike Arduino-based boards, typically there is no automatic reset on serial connection with STM32 boards. Please use `restart_method: command` with the @@ -19,14 +18,12 @@ STM32F1 port. Fixed pins ========== -When using serial, the UART used for communication with the host is -fixed to pins PA9 (TX) and PA10 (RX). When using USB, the PA11 (D-) -and PA12 (D+) pins are reserved. The USB code assumes that PA12 (D+) -has a fixed pullup resistor attached to it. +When using USB, the PA11 (D-) and PA12 (D+) pins are reserved. The USB +code assumes that PA12 (D+) has a fixed pullup resistor attached to +it. -SWD pins (PA13/PA14) are enabled for debugging and cannot be used for -any I/O. SPI uses pins PB13/PB14/PB15, but the pins can be used as -general I/O if SPI is not used. +SPI uses pins PB13/PB14/PB15, but the pins can be used as general I/O +if SPI is not used. Digital I/O =========== |