UPD78P4916 Datasheet, PDF (23/56 Pages) NEC – 16-BIT SINGLE-CHIP MICROCONTROLLER

µPD78P4916
4.2 PROM Write Procedure
Figure 4-1. Flowchart in Page Programming Mode
Address = Address + 1
Start
Address = G
VDD = 6.5 V, VPP = 12.5 V
X=0
Latch
Address = Address + 1
Latch
Address = Address + 1
Latch
Address = Address + 1
Latch
X = X+1
0.1-ms programming pulse
Fail
Verify 4 bytes
Pass
No
Address = N ?
Yes
VDD = 4.5 to 5.5 V, VPP = VDD
Pass
Verify all bytes
Fail
All Pass
Write operation end
Remarks 1. G = Start address
2. N = End address of the program
No
X = 10?
Yes
Defective
23