ML7404 Family LSIs
Hardware Design Manual
FEXL7404DG-03
6
●Example of an adjustment flow for initial frequency tolerance
The example of an adjustment flow in the case of measuring the frequency of a transmitted signal and
compensating initial frequency tolerance is shown below. In addition, for details, refer to the “LSI Adjustment
items and Adjustment method” - “TRX Frequency Adjustment” of data sheet (FEDL7404-0X).
START
END
TX_ON issue
[RF_STATUS: B0 0x0B]
Confirm TX frequency error
(using spectrum analyzer)
Adjust TRX frequency
FREQ_ADJ_SIGN([FREQ_ADJ_H: B1 0x42(7)])
FREQ_ADJ [9:0]([FREQ_ADJ_H/L: B1 0x42(1-0)/0x43])
Set TX frequency
[TX_FREQ_I/FH/FM/FL: B1 0x1B/1C/1D/1F]
