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Option 1

Option 2

Description

SD via SPI

SD SDMMC

Pros and cons

(plus) Protocol that FW is familiar with

(plus) Fewer physical pins

(minus) Uses a SPI port that could be used for something else

(plus) Built in data validation & redundancy

(minus) Harder to write FW for ('non-standard')

🔖 SDMMC Packet Overhead: 48 bits from host, 48 bits from SD card, 16 bits

Estimated cost

Status
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titleLarge

Status
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titleMedium

✅ Action items

\uD83C\uDF1F Outcome