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FM0+, FM3 & FM4 MCU

Anonymous
Not applicable

hii i am just going through the schematic of FM4-176L-S6E2CC-ETH kit and found that address pin  MAD19 and MAD20 has no use because  their is no pin for these pin in datasheet of SRAM  make me clear if i am wrong thank you

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AchimE_41
Employee

Hi,

Yes, the Pins (H1 and G2) are not used by the SRAM placed on the board, because to address 256k you only need 18 bit.

But even thought the Pins MAD19 and MAD20 are not used by that particular SRAM, they are still routed to the footprint to allow a replacement of the SRAM by a bigger one (up to 1M x 16bit) if needed.

regards,

Achim

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2 Replies
AchimE_41
Employee

Hi,

Yes, the Pins (H1 and G2) are not used by the SRAM placed on the board, because to address 256k you only need 18 bit.

But even thought the Pins MAD19 and MAD20 are not used by that particular SRAM, they are still routed to the footprint to allow a replacement of the SRAM by a bigger one (up to 1M x 16bit) if needed.

regards,

Achim

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Anonymous
Not applicable

Thank you aceh for reply and precious time

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