Cypress FM4 Series - Page 760

CHAPTER 14: External Bus Interface
760 FM4 Peripheral Manual, Doc. No. 002-04856 Rev. *E
 Pin List
The pin list of the external bus interface is shown in Table 2-1.
Table 2-1 Pin List of External Bus Interface
Pin Name
Function
MAD[24:0]
Address output pins
MADATA[31:0]
Data input/output pins
(These pins will be changed to input/output pins for address/data in multiplex mode.)
MCSX[7:0]
Chip select pins for SRAM and flash memory
MDQM[3:0]
Byte mask signal output pins
MALE
Address latch enable output pin
(Multiplex mode only)
MOEX
Output enable output pin
MWEX
Write enable output pin
MRDY
RDY signal input pin
MCLKOUT
Clock output pin
MNALE
Address latch enable output pin for NAND Flash memories
MNCLE
Command latch enable output pin for NAND Flash memories
MNREX
Read enable output pin for NAND Flash memories
MNWEX
Write enable output pin for NAND Flash memories
MCSX[8]
Chip select pin for SDRAM
MRASX
Low address strobe output pin for SDRAM
MCASX
Column address strobe output pin for SDRAM
MSDWEX
Write enable output pin for SDRAM
MSDCKE
Clock enable output pin for SDRAM
MSDCLK
Clock output pin for SDRAM
Note:
− Placement of the external bus interface pins depends on the product type. See the data sheets of
products used for the details.