Boot time of ADAU1442 in self-boot mode.

Block
Overhead Bytes
Data Bytes
Subtotal Bytes
Number of Blocks
Total Bytes
Total Bits
Clock Rate (MHz)
Duration (ms)

Header
16
0
16
1
16
128
3.072
0.042

Registers
8
2
10
45
450
3600
20
0.180

Program Memory
8
32768
32776
1
32776
262208
20
13.110

Data Memory 0
8
81920
81928
1
81928
655424
20
32.771

Data Memory 1
8
81920
81928
1
81928
655424
20
32.771

Footer
8
0
8
1
8
64
20
0.003

PLL Lock Wait Time
0
0
0
0
0
0
0
10.000

88.878

The table above shows an example of how long the maximum self-boot (SPI) should take place. The worst case is about 89 ms. Of course, if the self-boot EEPROM image is smaller, then the boot time will be shorter.

There is no register or pin that signifies that the self-boot is complete. Probably the easiest way to check if the self-boot is complete is to have a GPIO pin set up as an output and then have it output a flag in the SigmaStudio program. The flag pin will change state when the self-boot completes and the program starts running.

Dear Brett-san,

Thank you very much!

Best regards,

Takepiro