STM32WB55xx STM32WB35xx
Functional overview
trimming capacitor network thanks to a dual network of user programmable integrated
capacitors.
Figure 3. STM32WB55xx and STM32WB35xx RF front-end block diagram
EXT_
PA_TX
Timer and Power
control
AGC
RF control
Interrupt
Wakeup
AHB
BLE
controller
APB
BLE
modulator
BLE
demodulator
APB
Interrupt
Wakeup
802.15.4
MAC
802.15.4
modulator
802.15.4
demodulator
Adjust
HSE
Adjust
G
BP
filter
LNA
G
RF1
PLL
SMPS
See
notes
Trimmed
bias
LDO
LDO
LDO
Max PA
level
OSC_IN
VDDSMPS VSSSMPS VLXSMPS
OSC_OUT
VFBSMPS
VDDRF
32 MHz
Notes:
- UFQFPN48 and VFQFPN68: VSS through exposed pad, and VSSRF pin must be connected to ground plane
- WLCSP100 and UFBGA129: VSSRF pins must be connected to ground plane
MS45477V6
3.6.2
BLE general description
The BLE block is a master/slave processor, compliant with Bluetooth® specification 5.0
standard (2 Mbps).
DS11929 Rev 10
23/193
57