RF02
after S periods of the microcontroller clock (if a1=1 and ex=0) to enable the microcontroller to execute all
necessary commands before entering sleep mode itself. The 8-bit value S is determined by bits <s7:s0>.
8. Wake-Up Timer Command
bit 15 14 13 12 11 10
9
8
7
6
5
4
3
2
1
0
POR
1
1
1
r4 r3 r2 r1 r0 m7 m6 m5 m4 m3 m2 m1 m0 E000h
The wake-up time period can be calculated as:
wake-up = M * 2R [ms],
T
where M is defined by the <m7 : m0> digital value and R is defined by the <r4 : r0> digital value.
Note:
•
For continual operation the et bit should be cleared and set at the end of every cycle.
9. Data Transmit Command
bit
7
1
6
1
5
0
4
0
3
0
2
1
1
1
0
0
This Command Indicates that the following bitstream coming in via the serial interface is to be
transmitted.
Note
•
This command is not needed if the transmitters’ power management bits (ex, es and ea) are fully
controlled by the microcontroller and TX data comes through the FSK pin.
If the crystal oscillator was formerly switched off (ex=0), the internal oscillator needs tsx time, to
switch on. The actual value depends on the type of quartz crystal used.
If the synthesizer was formerly switched off (es=0), the internal PLL needs tsp startup time. Valid data
•
•
can be transmitted only when the internal locking process is finished.
Data Transmit Sequence Through the FSK Pin
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