ST eMotion, User Manual

Page: 8 / 39

Demonstration kit description UM0979
8/39 DocID017768 Rev 4

J1 connector ( Figure 3 , ref 3) can be used to both reprogram the STM32 and to debug
the code through the JTAG or SWD protocols.

Jumper JP7 ( Figure 3 , ref 4) is used to select either JTAG (JP7 unfitted) or SWD (JP7
fitted) mode.

eMotion also integrates six LEDs and three buttons:
–
LED D1 ( Figure 3 , ref 6) is switched on when the board is power supplied.
– LEDs D2 and D3 ( Figure 3 , ref 13) are directly connected to the interrupt pins of
the MEMS digital adapters (if available on the sensor mounted on the adapter
board).
– LEDs D4, D5, and D6 ( Figure 3 , ref 12) are general-purpose LEDs and are used
to indicate firmware states. For example, LED D6 is switched on when a specific
firmware is selected from those available. LED D5 on indicates that the
microcontroller is well configured for communication with the sensor. Finally the
LED D4 blinks according to the sensor data rate selected.
– Button SW3 ( Figure 3 , ref 1) is used to reset the STM32.
– Button SW1 and SW2 ( Figure 3 , ref 2 and ref 5) are connected to STM32 GPIOs
and are available to the user.
Table 1. Jumper configuration for power-down (PD), self test (ST) and high-pass filter
reset (HP)
Jumper on 1-2 position Jumper on 2-3 position Jumper unfitted
JP4
ST
logic level 1:
self-test ON
Self-test is handled by the
firmware
logic level 0:
self-test OFF, default
JP5
PD
logic level 1:
power-down mode
Power-down is handled by the
firmware
logic level 0:
normal mode, default
JP6
HP
logic level 1: external
high-pass filter reset
High-pass filter reset is
handled by the firmware
logic level 0:
normal mode, default