User manual

CHAPTER 6 CONNECTORS AND PINOUT

6. Introduction to the chapter

In this chapter are presented the connectors that can be found on the board all together with their

pinout and notes about them. Jumpers functions are described. Notes and info on specific

peripherals are presented. Notes regarding the interfaces are given.

Note that slashed signals (xxxx/yyyy) in the tables below might mean either multiplexing between

signals or port name correspondence on the processor.

6.1 JTAG/SWD debug

The board can be debugged from the 20-pin JTAG connector either by a JTAG or a SWD

compatible debugger. Below is the table of the JTAG. This interface can be used with the Olimex's

OpenOCD debuggers.

JTAG/SWD interface

Pin #

Signal

Name

Pin #

Signal

Name

1 +3.3V 11 -

2 +3.3V 12 GND

3 PB4/TRST 13 PB3/TDO

4 GND 14 GND

5 PA15/TDI 15 PB4/TRST

6 GND 16 GND

7 PA13/TMS 17 -

8 GND 18 GND

9 PA14/TCK 19 +5V_JTAG

10 GND 20 GND

6.2 SD/MMC slot

The microSD card slot is a standard 8pin connector.

We have tested a number of microSD cards on the STM32-H407 boards and all of them worked

fine regardless manufacturer or capacity. However, keep in mind that some of the lower quality

microSD cards might draw too much current from the slot which might cause power-state problems.

If you suspect the microSD card is causing problems please try using another one of better quality

for better results.

Page 14 of 28