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ST ST25R3911B User Manual
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Hardware
UM2042
10/25
DocID029132 Rev 3
Figure 4. USB i
nterface
1
1
2
2
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3
4
4
D
D
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B
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31.05.2017
10:09:36
Power Management.SchDoc
Title
Size:
Number:
Date:
File:
Revision:
Sheet
of
Time:
A4
ST25R3911B-DISCO
MDG NFC & Reader Competence Center
3V3
GND
3V3 LDO
GND
GND
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_1
μ
_0603_X5R
C103
C_1
μ
_0603_X5R
C106
C_2
μ
2_0402_X5R
C105
C_10n_0402_X7R
C102
C_10
μ
_0603_X5R
C101
C_10
μ
_0603_X5R
R101
LED101
PWR
1
D-
2
D+
3
ID
4
Shield
6
GND
5
P101
μ
USB
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
9
11
Table of Contents
Default Chapter
2
Table of Contents
2
Quick Start
5
Getting Started
5
System Requirements
5
Hardware
6
Block Diagram
6
Schematics
6
Figure 2. Functional Block Diagram
6
St25R3911B
7
Stm32L4 Mcu
7
USB Connectivity and Power Supply
7
Antenna and Matching Network Components
8
Figure 3. Schematics Overview
9
Figure 4. USB Interface
10
Figure 5. STM32L476 Schematics
11
Figure 6. ST25R3911B Schematics
12
Figure 7. Antenna and Matching Network Schematics
13
PCB Layout
14
PCB Overview
14
PCB Layers
14
Figure 8. PCB Overview
14
Figure 9. PCB Layout, Top Layer
16
Figure 10. PCB Layout, MID Layer 1
17
Figure 11. PCB Layout, MID Layer 2
18
Antenna Matching
20
Figure 13. VHBR Matching with an AAT Setting of 8
20
Figure 14. NFC Forum Matching with an AAT Setting of 11
21
Federal Communications Commission (FCC) and Industry Canada (IC) Compliance Statements
22
FCC Compliance Statement
22
Part 15.19
22
Part 15.21
22
Part 15.105
22
Fcc ID
22
Formal Notices Required by the Industry Canada ("IC")
22
Compliance Statement
22
Declaration de Conformité
23
IC ID
23
Revision History
24
Figure 1. ST25R3911B-DISCO PCB (Top View)
24
Figure 12. PCB Layout, Bottom Layer
24
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ST ST25R3911B Specifications
General
Brand
ST
Model
ST25R3911B
Category
Microcontrollers
Language
English
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