Cypress FM4 Series - Connection Examples

CHAPTER 14: External Bus Interface
794 FM4 Peripheral Manual, Doc. No. 002-04856 Rev. *E
4. Connection Examples
This section provides an example of connections with external devices.
8-bit SRAM
Figure 4-1 shows an example of connecting an 8-bit SRAM.
Figure 4-1 Example of 8-bit SRAM Connection
This LSI
x8 SRAM
MAD [24:0]
MCSX [0]
MOEX
MWEX
MADATA [7:0]
A
CS
OE
WE
DQ [7:0]
8-bit SRAM  2
Figure 4-2 shows an example of connecting two 8-bit SRAMs.
Figure 4-2 Example of 8-bit SRAMx2 Connection
This LSI
x8 SRAM
x8 SRAM
MADATA [7:0]
MADATA [15:8]
MAD [24:1]
MCSX [0]
MDQM [0]
MDQM [1]
A
CS
OE
WE
DQ [7:0]
A
CS
OE
WE
DQ [7:0]
MOEX
MDQM [1:0]
MADATA [15:0]
The MDQM signal can be used as a write enable for the devices without input mask feature.
8-bit SRAM
8-bit SRAM
8-bit SRAM