5 chip erase flowchart – Samsung S3F401F User Manual
Page 67
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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
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