Limitations; Smartcard, Swp; Table 28. Assignment Of Ports For St8024Cdr Control - STMicroelectronics STM32L476G-EVAL User Manual

Hardware layout and configuration
Element
SB30
2.26.1

Limitations

Touch sensing button is exclusive with LCD glass module, thermal sensor PT100 via sigma-
delta conversion, USB OTG FS port operating as USB host, SWP and NFC.
2.27

Smartcard, SWP

ST8024CDR, an interface device for 3 V and 5 V asynchronous smartcards, is fitted on the
STM32L476G-EVAL main board, in U30 position. ST8024CDR performs all supply
protection and control functions of the smartcard.
ST8024CDR is controlled, on its turn, by STM32L476ZGT6, directly through its ports or
indirectly through ports of the U33 I/O expander device (IOExpander2), as shown in
Table 28.
The SWIO port of the smartcard for single-wire protocol (SWP) communication is managed
directly by PB12 port of STM32L476ZGT6.
ST8024CDR
port
5V/3V
I/OUC
XTAL1
OFF
RSTIN
CMDVCC
Table 29
Refer to
CN11 and CN14 rows of I/Os can be done by means of the MB979 daughterboard plugged
into CN11 and CN14 in I/O-bridge position, as explained in
48/100
Table 27. Touch-sensing-related configuration elements (continued)
Setting
Default setting. PC7 port of STM32L476ZGT6 is not routed to motor
Open control.
This setting is good for robustness of touch sensing.
PC7 is routed to motor control. This setting is not good for robustness
Closed
of touch sensing.

Table 28. Assignment of ports for ST8024CDR control

Smartcard power supply selection pin.
Quartz crystal or external clock input
Card reset command input
Activation sequence start command input (active low)
provides information on configuration elements related with smartcard operation.
Table 8, Table 12,Table 26 andTable 27
Function
Data I/O line
Card presence detect
for complementary information. Bridging of
DocID027351 Rev 3
Configuration
Control port
IOexpander2 GPIO7
STM32L476ZGT6 PC4
STM32L476ZGT6 PB0
IOexpander2 GPIO8
IOexpander2 GPIO5
IOexpander2 GPIO6
Section 2.15.
UM1855