Hardware layout UM1775
26/39 UM1775 Rev 4
6.15 Extension connectors
The male headers P2 and P3 can connect the STM32L053 Discovery board to a standard
prototyping/wrapping board. STM32L053C8T6 GPIOs are available on these connectors.
P2 and P3 can also be probed by an oscilloscope, logical analyzer or voltmeter.
Table 8. Extension connectors
MCU pin Board function
Main function
LQFP48 pin num.
SYSTEM
VCP
PushButtons
LED
NFC CR95HF-B
USB USER
Linear touch sensor
E-paper Display
Idd Measure
Free I/O
Power Supply
P2
P3
CN1
CN3
SBx
(1)
BOOT0 44
BOOT0
----------6----
NRST 7
NRST
-----------9---
PA0 10 - -
BP_USER
---------11---
PA1 11--------
MFX_WAKEUP
---12---
PA2 12------
TS_G1_IO3
-----13--
SB28
PA3 13------
TS_G1_IO4
-----14--
SB27
PA4 14---------
PA4
--15---
PA5 15 - - - -
RED
-------16---
PA6 16------
TS_G2_IO3
-----17--
SB26
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