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S2-LPQTR 数据表(PDF) 49 Page - STMicroelectronics

部件名 S2-LPQTR
功能描述  Excellent receiver selectivity and blocking
PDF  90 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

S2-LPQTR 数据表(HTML) 49 Page - STMicroelectronics

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S2-LP
Operating modes
DocID029944 Rev 1
49/90
Table 45: States
State code(1)
State name
Digital LDO
SPI
XTAL
RF synth.
Wake-up timer
NA
SHUTDOWN
OFF
Off
Off
Off
Off
0x02
STANDBY
ON
On
Off
Off
Off
0x01
SLEEP_A
On
Off
Off
On
0x03
SLEEP_B
On
Off
Off
On
0x00
READY
On
On
Off
Don't care
0x0C
LOCK
On
On
On
Don't care
0x30
RX
On
On
On
Don't care
0x5C
TX
On
On
On
Don't care
0x50
SYNTH_SETUP
On
On
On
Don't care
Notes:
(1)Other codes are invalid and are an indication of an error condition due to bad registers configuration and/or
hardware issue in the application board hosting.
Commands are used in the S2-LP to change the operating mode and to use its
functionality. A command is sent on the SPI interface and may be followed by any other
SPI access without pulling CSn high. A command code is the second byte to be sent on the
MOSI pin (the first byte must be 0x80). The commands are immediately valid after SPI
transfer completion (no need for any CSn positive edge).
6.1
Command list
Table 46: Commands
Command
code
Command name
State for
execution
Description
0x60
TX
READY
Send the S2-LP in TX state for
transmission
0x61
RX
READY
Send the S2-LP in RX state for
reception
0x62
READY
STANDBY,
SLEEP, LOCK
Go to READY state
0x63
STANDBY
READY
Go to STANDBY state
0x64
SLEEP
READY
Go to SLEEP state
0x65
LOCKRX
READY
Go to LOCK state by using the RX
configuration of the synthesizer
0x66
LOCKTX
READY
Go to LOCK state by using the TX
configuration of the synthesizer
0x67
SABORT
TX, RX
Exit from TX or RX states and go to
READY state
0x68
LDC_RELOAD
ANY
Reload the LDC timer with a pre-
programmed value stored in registers
0x70
SRES
ANY
Reset the S2-LP state machine and
registers values
0x71
FLUSHRXFIFO
All
Clean the RX FIFO



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