ST TN100 RF, User Manual, Page: 13 / 37

Obsolete Product(s) - Obsolete Product(s)
UM0579 TN100 sensor board
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3.3 LED indicators
There are 6 LEDs available on the board. LD1 to LD4 are used for general-purpose and are
driven directly by the STM32 from the TN100 board. LD5 indicates TX/RX activity and this
pin is connected directly to the TN100 device on the board. LD6 indicates the presence of
an ex 5 V power supply either from the USB or from the JTAG connection. When
LD6 is off, the board is powered from batteries to reduce the overall power consumption.
S3 11 PB2 General-purpose
S4 18 PA8 General-purpose
Table 8. General-purpose and reset buttons description table (continued)
Reference
Board pin
connection
Microcontroller
pin connection
Function Schematics
C9
100 nF
S3
GM: DT2112C
PB2
R14
0
Ω
R40
100
Ω
AM00275
C8
100 nF
S4
GM: DT2112C
PA 8
R13
0
Ω
R39
100
Ω
AM00276