Other Parts Discussed in Thread: TRF3765
Hello,
We are doing a SPI communication between the TRF3765 and a PIC (16F876A) and we would like to have more information about how to do this, like an example.
This communication is required to set the registers of the TRF3765.
Thank you.
Mariana.
The 4WI Timing Diagram in datasheet figure 64 depicts waveform shapes required to address and write individual registers. Figure 65 extends the timing diagram and waveform shapes to include readback data. A set of waveforms from a read register 2 command (from a companion device very similar to the TRF3765) is included below.
The register contents required to operate the device are described in tables 2 through 10 with readback operation in tables 11 and 12. Complete register content examples are included in the download "TRF3765 GUI." One example file includes the following GUI commands as a macro:
register_write Register 1 0000 0x78300049
register_write Register 3 0000 0x3B6AAAAB
register_write Register 4 0000 0x8A1CE00C
register_write Register 5 0000 0x1D8E968D
register_write Register 6 0000 0x5471100E
register_write Register 2 0000 0x88800B4A
Writing these register bits in the order given configures the TRF3765 to 2793.32MHz fractional mode. The GUI can be used to change configuration arbitrarily and view the corresponding register contents.
