AN334

Rev. 0.4

3

5. Hardware

The PCB schematic shown in Figure 2 is used to demonstrate the code. The MCU transitions to the next frequency

in the list following the pressing of a switch (SW1). The status LEDs light in sequence to show the index of the

frequency currently selected.

Figure 1. Reference Design Expected Usage Model

Silicon Labs’

MCU ‘F301

Control Processor

(FPGA, ASIC, uP)

Si57x

Output

Frequency

27MHz

61.44MHz

71.1758MHz

.

.

.

1400MHz

Start-up

Output

Frequency

Array

Frequency

Select

Sequence

Next

Next

N-bit

Index

I2C