Users Manual

6.23 Smartcard
The STM32MP157x-EV1 board supports one Smartcard interface. The MB1262/CN23 Smartcard connector is
used as card reader.
6.23.1 Smartcard interface
A 3V3 Smartcard interface MB1262/U5 is used between the card reader connector MB1262/CN23 and the
Smartcard controller port of STM32MP157xAA3.
The Smartcard interface is connected for some IO to the STM32MP157xAA3 and for other IO to the MFX IO
expander.
Table 36. HW configuration for the Smartcard interface
IO Configuration
PZ7 PZ7 is connected to Smartcard interface as SMARTCARD_IO
PZ6 PZ6 is connected to Smartcard interface as SMARTCARD_CLK
MFX_IO6 MFX_IO6 used as SMARTCARD_3/5V
MFX_IO7 MFX_IO7 used as SMARTCARD_OFF
MFX_IO8 MFX_IO8 used as SMARTCARD_RST
MFX_IO9 MFX_IO9 used as SMARTCARD_CMDVCC
Figure 21. Smartcard connector pinout MB1262/CN23
Table 37 describes the Smartcard interface MB1262/U5 and connector pinout MB1262/CN23.
Table 37. Smartcard interface MB1262/U5 and connector pinout MB1262/CN23
Pin
Board function U5 Smartcard interface pin
C1 VCC: Card supply U5-17
C2 RST: Card Reset U5-16
C3 CLK: Card CLK U5-15
C4 NC U5-13
C5 GND: CARD GND U5-14
C6 SWIO -
UM2535
Smartcard
UM2535 - Rev 2
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