Chapter 6 Hardware; Introduction To The Chapter; Jtag Connector - OLIMEX STM32-P207 User Manual

OLIMEX© 2012

CHAPTER 6 HARDWARE

6. Introduction to the chapter

In this chapter are presented the connectors that can be found on the board all together with their
pinout. Proto area is shown. Jumpers functions are described. Notes and info on specific peripherals
are presented. Notes regarding the interfaces are given.

6.1 JTAG connector

The 20-pin JTAG connector provides the interface for JTAG or/and SWD/TRACE
programming/debugging. It is advisable to use SWD or TRACE interface programmers.
*The JTAG TRST signal is multiplexed with the display. When using JTAG interface you will not
be able to debug the display of the board. If you wish to program the board with JTAG make sure to
hold the WKUP button when programming/debugging until you wipe the system memory or the
JTAG will not connect. This behavior is caused by the initial demo which redefines the pin to show
the display.
Another workaround is to set the bootloader jumpers so the board would attempt to boot from the
Embedded SRAM (and since it is blank, the display would not start which will allow you to debug
with the JTAG). Note this issue is not present if you use SWD interface.
Pin # Signal Name
1 +3.3V
2 +3.3V
3 TRST/SPI1_MISO*
4 GND
5 PGCTDI/I2S3_WS
6 GND
7 TMS
8 GND
9 TCK
10 GND
JTAG/SWD interface
Pin #
11
12
13
14
15
16
17
18
19
20
Signal Name
+3.3 V
GND
TDO/I2S3_CK
GND
RST
GND
+5V_J-LINK
GND
+5V_J-LINK
GND
Page 14 of 32
STM32-P207 user's manual