ADMUX bus how to connect to Sync SRAM

Tip / Sign in to post questions, reply, level up, and achieve exciting badges. Know more

cross mob
Mitchell_shen
Level 4
Level 4
Distributor - Zenitron(GC)
100 sign-ins 5 solutions authored First solution authored

We want use NXP MPC5777C MCU to extend Sync. SRAM externally.

https://www.nxp.com/files-static/32bit/doc/data_sheet/MPC5777C.pdf

But the NXP MPC5777C some pins are ADMUX bus.

Cloud you guide us how to implement the connection?

Thanks,

Mitchell

0 Likes
1 Solution

Hi Mitchell,

The connections are not feasible without any glue logic. You will need to implement address latch it in the design. You can also check this in the timing diagrams of the Sync part in the datasheet that there are some times overlap in the address and data contents and that will need a proper logic for reliable operation.

Thanks,

Pradipta.

View solution in original post

0 Likes
2 Replies
Mitchell_shen
Level 4
Level 4
Distributor - Zenitron(GC)
100 sign-ins 5 solutions authored First solution authored

Update below NXP timing diagram for reference.

NXP_EBI_Timing.png

Does Cypress CY8C1381KVE33-133AXI can direct connection without glue logic?

Or is need implement address latch IC in this design?

Thanks,

Mitchell

0 Likes

Hi Mitchell,

The connections are not feasible without any glue logic. You will need to implement address latch it in the design. You can also check this in the timing diagrams of the Sync part in the datasheet that there are some times overlap in the address and data contents and that will need a proper logic for reliable operation.

Thanks,

Pradipta.

0 Likes