AN543
Rev. 0.9
7
5.2. Powerup Receiver from a Patch
1. Supply VA, VD, and VI0 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, proceed to the next step.
4. (Optional – step 1 of 3 to verify part firmware revision and ROM revision.) Both part firmware revision and ROM
revision must be compatible with a partial patch and ROM revision must be compatible with a full patch. Send
the POWER_UP command for the desired function (AM, FM).
Supply VA, VD, and VIO
while keeping the RSTB = 0
START
After a minimum of 100 µs,
set RSTB = 1
After a minimum of 100 µs,
continue to the next step
Send the POW ER_UP
command for the desired
function (AM , FM)
Send POW ER_DOW N
comm and
A
B
Verify Firmware and ROM
revision?
A
B
Send PART_INFO command
W ait at least 100 ms
Send second POW ER_UP
command for the desired
function (AM , FM)
C
Send the POW ER_UP
command with boot loader
function
Send patch data.
Send the POW ER_UP
com mand for the desired
function (AM, FM)
Comm ence normal operation.
Send POW ER_DOW N
command.
W ait at least 100 m s
Send second POW ER_UP
command with bootloader
function
B
C
Send command to force
CTS = 1
Send command to force
CTS = 1
