EasyManuals Logo

STMicroelectronics STM32WL5 Series User Manual

STMicroelectronics STM32WL5 Series
1450 pages
To Next Page IconTo Next Page
To Next Page IconTo Next Page
To Previous Page IconTo Previous Page
To Previous Page IconTo Previous Page
Page #175 background imageLoading...
Page #175 background image
RM0453 Rev 5 175/1450
RM0453 Sub-GHz radio (SUBGHZ)
227
BUSY timing is shown in the figure below.
Figure 16. Sub-GHz radio BUSY timing
For the different mode transitions, typical busy timing values are given in the table below.
5.8 Sub-GHz radio SPI interface
The sub-GHz radio SPI slave interface gives access to the sub-GHz radio configuration,
registers and buffer memory, through SPI commands. It is connected to the SUBGHZSPI
master interface peripheral on the CPU bus matrix.
For a write access, an opcode byte is sent followed by sending the command parameter
bytes.
For a read access, an opcode byte is sent followed by receiving data bytes.
Table 33. Operation mode transition BUSY switching time
Mode transition SPI command (sub-GHz radio event)
t
SWMODE
typical (μs)
Sleep-to-Standby (no data retention) SPI NSS low 20 μs 3500
Sleep-to-Standby (with data
retention)
SPI NSS low 20 μs (RTC end-of-count) 340
Standby-to-Standby with HSE32 Set_Standby() 31
Standby (HSE32 off)-to-FS
(1)
1. When entering FS mode, BUSY is cleared to 0 when RF-PLL is locked.
Set_Fs() 50
Standby (HSE32 off)-to-TX
(2)
2. When entering TX mode, BUSY is cleared to 0 when the PA ramps up and the transmission of
preamble starts.
all Set_Tx() 126
Standby (HSE32 off)-to-RX
(3)
3. When entering RX mode, BUSY is cleared to 0 when the receiver is ready to receive data.
Set_Rx(), Set_Cad() 83
Standby (HSE32 on)-to-FS
(1)
Set_Fs() 40
Standby (HSE32 on)-to-TX
(2)
all Set_Tx() 105
Standby (HSE32 on)-to-RX
(3)
Set_Rx(), Set_Cad() 62
FS-to-TX
(2)
all Set_Tx() 76
FS-to-RX
(3)
Set_Rx(), Set_Cad() 41
MSv64330V1
Opcode
Param 1 Param n
t
SWMODE
t
SW
BUSY
NSS
SPI
Write command

Table of Contents

Questions and Answers:

Question and Answer IconNeed help?

Do you have a question about the STMicroelectronics STM32WL5 Series and is the answer not in the manual?

STMicroelectronics STM32WL5 Series Specifications

General IconGeneral
BrandSTMicroelectronics
ModelSTM32WL5 Series
CategoryMicrocontrollers
LanguageEnglish

Related product manuals