Samsung S3F401F User Manual
Page 77
S3F401F_UM_REV1.00
INTERNAL FLASH ROM
5-17
Flash Memory Control Register (Continued)
FMUCON (0x00C)
Access: Read/Write
USTRSTPT Operation(note) Start Bit
0 = Stop
1 = Start
Count Clock Enable Bit
0 = Disable
UOSCEN
1 = Enable
INTERLEAVE
Flash Memory Operation Mode Bit
0 = Not interleave mode
1 = Interleave mode
Note: Interleave mode must be used for above 45MHz.
The FMUCON can determine the program / erase operation. In user program mode, the Flash Memory
Controller can support normal program, option program, sector erase and chip erase. Among operating
modes, only one operating mode can be selected.
NOTE
S3F401F supports the following program type-Chip Erase, Sector Erase, Normal Program and Option
Program. Each command is UCERSR, USERSR, UPGMR and UOPGMR bit.
Important Note
UOSCEN must be enabled before starting erase/program operation.(Refer to the flow-chart)