Samsung S3F401F - Manual (Page 64)

INTERNAL FLASH ROM S3F401F_UM_REV1.00
5-4
4.2 NORMAL PROGRAM
+
START
; Address set
; Data set
; Key value set whenenver starts
; Program command select & start
Command: FMUCON.2-UPGMR
; Check command bit to know
if operation is completed or not
; Next address/data set
FINISH
Yes
No
Yes
No
; Enable flash osc
; Compare End address
FMKEY 0x5A5A5A5A
FMUCON + UOSCEN Bit
FMUCON + CommandBit + CPUStatus Bit + Start Bit
Can be executed another
instruction in SRAM/SDRAM
COUNT=END?
FMADDR New 32-bit Address
FMDATA New 32-bit Data
32-bit Data Writing
Command Bit Clear
CPUHOLD?
FMADDR 32-bit Address
FMDATA 32-bit Data
Figure 5-2. Normal Program Flowchart