Rf02 – Rainbow Electronics RF02 User Manual

Page 15

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 .

8. Wake-Up Timer Command

bit

7 6 5 4 3 2 1 0 POR

1 1 1 r4 r3 r2 r1

E000h

The wake-up time period can be calculated as:

wake-up

= M * 2

[ms],

where M is defined by the digital value and R is defined by the 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 6 5 4 3 2 1 0

1 1 0 0 0 1 1 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 t

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 t

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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