参数资料
型号: MICRF405YML TR
厂商: Micrel Inc
文件页数: 15/46页
文件大小: 649K
描述: TRANSMITTER ASK/FSK 24-MLF
标准包装: 1
频率: 290MHz ~ 980MHz
应用: ISM
调制或协议: ASK,FSK
数据传输率 - 最大: 200 kbps
功率 - 输出: 10dBm
电流 - 传输: 18mA
数据接口: PCB,表面贴装
天线连接器: PCB,表面贴装
电源电压: 2.2 V ~ 3.6 V
工作温度: -40°C ~ 125°C
封装/外壳: 24-VFQFN 裸露焊盘,24-MLF?
包装: 标准包装
产品目录页面: 571 (CN2011-ZH PDF)
其它名称: 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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