User Manual

Hardware UM2042
10/25 DocID029132 Rev 2
Figure 4. USB interface
1 1
2 2
3 3
4 4
D D
C C B B
A A
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4B1
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A4 ST25R3911B-DISCO
MDG NFC & Reader Competence Center
3V3
GND
3V3 LDO
GNDGND
USB Interface
USBD_P USBD_N V_RF 3_3V
PM/USB_con
GND
EN
1
GND
2
VO
4
NC
5
GND
0
VI
6
PG
3
U102 LD39050PU33R
GND
ESD G101 Logo_ESD RoHS G102 Logo_RoHS
ST25 G103 Logo_ST25 ST Microelectronics G104 Logo_STM
L102 FB_0603_0R
L101 FB_0603
C104
C_1μ_0603_X5R
C103
C_1μ_0603_X5R
C106
C_2μ2_0402_X5R
C105
C_10n_0402_X7R
C102
C_10μ_0603_X5R
C101
C_10μ_0603_X5R
R101
LED101
PWR
1
D-
2
D+
3
ID
4
Shield
6
GND
5
P101 μUSB
VBUS
1
D-
2
D+
3
ID
4
GND
5
D-
6
D+
7
GND
8
U101
ECMF02-4CMX8
V_RF
V_RF
V_RF
3V3
J101 closed 0R
L103 FB_0603_0R
PM/USB_con
USBD_N USBD_P
USBD_P USBD_N