Part Number: AM625
Customer scanned radiation over AM625x package, there is a frequency point 1.599GHz radiation exceeded as below picture
TThe arrow point to Pin 1, the radiation center is among DDR pin map, I guess it is DDR controller inside here.
Customer tried 750MHz DDR frequency, but the radiation frequency point doesn't change to follow DDR frequency.
Where is the 1.599MHz frequency comes from?
Suggestion to overcome the radiation? can it use SSC?
Can you elaborate the setup - is this a probe that customer used.
The setup is as the picture, the probe scan the board to figure out the radiation point.
Can you please confirm the core frequency.
1.25GHz.
Can you please share additional details on the peripherals customer is using
R5F:400MHz, tried 333MHz, doesn't help.
Main Domain:
DDR: 800MHz, tried 750MHz.
CPSW, RGMII, 250MHz ->100MHz.
QSPI0: 200MHz ->50MHz.
eMMC0: HS200
PRU: 200MHz.
ePWM0/1/2: 250MHz
eCAP1/2 125MHz -> 1KHz fan
McSPI0 50MHz slave
UART0 48MHz
MCU_I2C0: 96MHz -> 400KHz
MCU_McSPI0 50MHz -> 10MHz.
MCU_UART0: 48MHz -> 115200bps
MCU_RTI0: 12.5MHz.
WKUP_UART0: 48MHz -> 115200bps
GPT timer： 25MHz
WKUP_TIMER0: 25MHz/8=3.125MHz.
