Prom Write Procedure - NEC mPD780208 Subseries User Manual

19.3.2 PROM write procedure

Address = Address + 1
G = Start address
N = Last address of program
CHAPTER 19 µ PD78P0208
Figure 19-3. Page Program Mode Flowchart
Start
Address = G
V = 6.5 V, V = 12.5 V
DD PP
X = 0
Latch
Address = Address + 1
Latch
Address = Address + 1
Latch
Address = Address + 1
Latch
X = X + 1
0.1 ms program pulse
Verify
4 bytes
Pass
No
Address = N?
Yes
V = 4.5 to 5.5 V, V = V
DD
PP
Pass
All bytes
verified?
All pass
End of write
User's Manual U11302EJ4V0UM
X = 10?
Fail
DD
Fail
No
Yes
Defective product
377