Hardware Layout And Configuration; Ceb Mb1779 Board; Mb1779 Pcb Layout; Figure 2. Mb1779 Hardware Block Diagram - ST STM32WL Series User Manual

6

Hardware layout and configuration

6.1

CEB MB1779 board

The CEB (connectivity expansion board) MB1779 board is designed around the STM32WL5MOC module, which
includes an STM32 microcontroller in a 73‑pin UFBGA package.
STM32WL5MOC module and its peripherals, push-buttons, LEDs, USB, and sensors.
the location of these features on the CEB MB1779 board. The mechanical dimensions of the board are shown in
Figure 5.
Green 5V_PWR
LED (LD4)
6.1.1

MB1779 PCB layout

Product
sticker
STMod+
connector
(CN1)
Magnetometer
(U7)
E5V supply
connector
(CN4)
E3V3 supply
connector
(CN5)
Temperature sensor
UM3127 - Rev 1
Figure 2.
Temperature
sensor (U14)
(U14)
I2C bus
EEPROM
Barometer
(U8)
(U4)
(U4)
Accelerometer-
gyroscope
(U2) (U2)
Serial flash
memory
Magnetometer
(U7)
(U7)
(U10)
(CN4)
Figure 3.
CMOS
(U14)
serial flash memory
(U10)
RESET button
Figure 2
MB1779 hardware block diagram
32 MHz
TCXO
I 2 C
SPI
STM32WL55
VCP
Reset
button
(SW2)
MB1779 top layout
3D accelerometer and 3D gyroscope (U2)
Barometer (U4)
3V3 regulator (U6)
User LEDs
(LD1, LD2,
and LD3)
(SW2)
Hardware layout and configuration
shows the connections between the
Figure 3 and Figure 4
(U3)
STM32WL5MOC module
32 kHz
ST-SAFE
Crystal
GPIO
RF switch/
control
and
RF
matching
SWD
User
DEBUG
button
(JP2) (CN3) (SW1)
DC switches
(U1 and U5)
STM32WL5M module
(U3)
I 2 C EEPROM
(U8)
STDC14 debug
Connector
(CN3)
USER button
(SW1)
IDD jumper for
current measurement
(JP2 ON)
UM3127
show
SMA
connector
(CN2)
SMA antenna
connector
(CN2)
page 7/47