Samsung S3F401F - Manual (Page 67)

S3F401F_UM_REV1.00 INTERNAL FLASH ROM
5-7
4.5 CHIP ERASE FLOWCHART
+
; Key value set whenenver starts
; Program command select & start
Command: FMUCON.0 - UCERSR
; Check command bit to know
if operation is completed or not
FINISH
; Enable flash osc
FMKEY 0x5A5A5A5A
FMUCON + UOSCEN Bit
FMUCON + CommandBit + CPUStatus Bit + Start Bit
START
No
Yes
Another instruction can be
executed in SRAM/SDRAM
32-bit Data Writing
Command Bit Clear
CPUHOLD?
Figure 5-5. Chip Erase Flowchart