參數(shù)資料
型號: MICRF405YML TR
廠商: Micrel Inc
文件頁數(shù): 15/46頁
文件大小: 649K
描述: TRANSMITTER ASK/FSK 24-MLF
標準包裝: 1
頻率: 290MHz ~ 980MHz
應用: ISM
調制或協(xié)議: ASK,F(xiàn)SK
數(shù)據(jù)傳輸率 - 最大: 200 kbps
功率 - 輸出: 10dBm
電流 - 傳輸: 18mA
數(shù)據(jù)接口: PCB,表面貼裝
天線連接器: PCB,表面貼裝
電源電壓: 2.2 V ~ 3.6 V
工作溫度: -40°C ~ 125°C
封裝/外殼: 24-VFQFN 裸露焊盤,24-MLF?
包裝: 標準包裝
產(chǎn)品目錄頁面: 571 (CN2011-ZH PDF)
其它名稱: 576-1965-6
Micrel
MICRF405
 
 
 
 
April 2006 
15
M9999-041906
 (408) 955-1690
 
How to transmit a Packet with the Packet Engine:
 
YES
NO
NO
YES
TURN on
PA
PLL IN LOCK?
[LD=1"]
Send
data
CALL PROG
[TX]
PLL IN LOCK?
[LD=1"]
NO
YES
INIT WRITE
SEQUENCE
[SET SEN=0"]
INIT TX BUFFER
[WRITE ADDR 29,
R/W =0"]
WRITE FRAME
LENGTH
i=0
RDY = falling
edge?
WRITE PAYLOAD
BYTE i
i=n?
END TX msg
sequence
[SEN=1"]
CALL PROG
[Power down]
END
MICRF405 waits for
the PLL to lock;
LD=1", Turns on PA
and waits for the PLL
to lock with PA on;
LD=1", then start to
send Preamble,
SyncID and Frame
length.
PROG
INIT WRITE
SEQUENCE
[SET SEN=0"]
WRITE CONTROL
WORD
[ADDRESS + R/W +
CONTROL WORD]
LOAD CONTROL
WORD
[SET SEN=1"]
RETURN
Control word, e.g:
TX mode:
Mode1-0=3 [TX]
PA_LDc=1"[Turns on PA
stage when PLL is in lock]
MOD_LDc_en=1"
[Modulation starts once
frame length is written into
data byte and PA is turned
on and LD is high.]
PA_FEc_en=1" [The PA is
turned off immediately after
last bit in packet is sent.]
Power down mode:
Mode1-0=0
MICRF405 INTERNAL PROCESS
i=1+1
NO
YES
Wait for [2 +
number of CRC
bytes] falling edge
of RDY. Then wait
1 bit periode.
MICRF405 starts the
XCO. When XCO is
stable the MICRF405
powers up the LDOs
and starts the PLL.
 
Figure 6. Flowchart of Transmitting a Packet Using the Packet Engine.
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