Hello, we are working with the ADSP-SC835, using the ADSPSC835W-EV-SOM as a guide, but in our design, we need 2 DSPs connected through LinkPort, one for RX and other for TX, to have the maximum speed available.
I have 2 questions about this design:
1 - Can I use the same power supplies needed to supply both DSPs at the same time? Because we don´t have much space.
The approach is:
DC Input -> +3V3 as main supply, and used for DC/DC inputs and VDD_EXT
Same LDO as EV-SOM for +1.8V supply for VDD_REF, VDD_ANA, etc., as the power calculations from your spreadsheet says 50mA and the LDO has 200mA max.
DC/DC for 1.39V 4A for VDD_DMC, and memories supplies, as the calculations give me 500mA for each DSP, and to be sure.
DC/DC for 1V 12A DC/DC for VDD_INT, as the calculations give me 5.5A for each DSP as maximum use.
For VTT supply I used one regulator for each memory as each DSP has it´s one DDR3 memory.
2 - Can I supply the clock to DSP2 from SYS_CLKOUT from DSP1?
If you need more details about the structure of the design, don´t hesitate to ask, thanks
PS: It´s the same project as the questions from Leopoldo, for example here ADSP-SC835 bootloader.
