MICRF405YML TR Micrel Inc, MICRF405YML TR Datasheet - Page 15

• Manufacturer Part Number: MICRF405YML TR
• Description: 868-915 MHz ISM Band Transmitter
• Manufacturer: Micrel Inc

Specifications of MICRF405YML TR

• Frequency: 290MHz ~ 980MHz
• Applications: ISM
• Modulation Or Protocol: ASK, FSK
• Data Rate - Maximum: 200 kbps
• Power - Output: 10dBm
• Current - Transmitting: 18mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Voltage - Supply: 2.2 V ~ 3.6 V
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 24-MLF®, QFN
• Operating Temperature (min): -40C
• Operating Temperature (max): 125C
• Operating Temperature Classification: Automotive
• Product Depth (mm): 4mm
• Product Length (mm): 4mm
• Operating Supply Voltage (typ): 2.5/3.3V
• Operating Supply Voltage (max): 3.6V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Memory Size: -
• Lead Free Status / Rohs Status: Compliant
• Other names: 576-1965-2; MICRF405YMLTR; MICRF405YMLTR

April 2006
How to transmit a Packet with the Packet Engine:
Micrel
Figure 6. Flowchart of Transmitting a Packet Using the Packet Engine.
[WRITE ADDR 29,
WRITE PAYLOAD
INIT TX BUFFER
WRITE FRAME
[SET SEN=”0"]
PLL IN LOCK?
PLL IN LOCK?
RDY = falling
CALL PROG
SEQUENCE
INIT WRITE
R/W =”0"]
LENGTH
TURN on
[LD=”1"]
[LD=”1"]
BYTE i
edge?
Send
i=1+1
data
[TX]
i=n?
PA
i=0
YES
YES
YES
MICRF405 INTERNAL PROCESS
YES
NO
NO
NO
NO
stable the MICRF405
MICRF405 starts the
powers up the LDOs
XCO. When XCO is
and starts the PLL.
bytes] falling edge
of RDY. Then wait
and waits for the PLL
LD=”1", Turns on PA
”LD=1", then start to
number of CRC
MICRF405 waits for
to lock with PA on;
SyncID and Frame
[Power down]
1 bit periode.
END TX msg
CALL PROG
Wait for [2 +
the PLL to lock;
send Preamble,
[SEN=”1"]
sequence
END
length.
15
[ADDRESS + R/W +
CONTROL WORD]
WRITE CONTROL
LOAD CONTROL
[SET SEN=”0"]
[SET SEN=”1"]
INIT WRITE
SEQUENCE
RETURN
WORD
WORD
PROG
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
[phone]
M9999-041906