Silicon Laboratories Si475X Series Programming Manual page 4

AN543
5.1. Powerup Receiver from Internal Memory
1. Supply VA, VD, and VIO while keeping the RSTB = 0. Power supplies may be sequenced in any order.
2. After a minimum of 100 µs, set RSTB = 1.
3. After a minimum of 100 µs, continue to the next step.
4. Send the POWER_UP command for the desired function (AM, FM).
4
START
Supply VA, VD, and VIO while
keeping the RSTB = 0
After a minimum of 100 µs,
set RSTB = 1
After a minimum of 100 µs,
continue to the next step
Send the POWER_UP
command for desired function
(AM, FM)
Wait at least 100 ms
Send command
to force CTS = 1
Send second POWER_UP
command for the desired
function (AM, FM)
Commence normal operation
Send POWER_DOWN
command
Rev. 0.9