Correct power supply for a 2 DSP board

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.

Thread Notes
Divya.P - Moved from Processors & DSP to ADSP-SC83x. Post date updated from Thursday, June 4, 2026 8:47 PM UTC to Friday, June 5, 2026 3:43 AM UTC to reflect the move.

stefschin - Moved from ADSP-SC83x to Processors & DSP. Post date updated from Friday, June 5, 2026 3:43 AM UTC to Monday, June 8, 2026 6:40 PM UTC to reflect the move.

hardware

SHARC-FX

SC835

processors and dsp

SYS_CLKOUT

Processors and Microcontrollers

power

ADSP-SC835

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