127
Figure 6.5 shows a PROM write/verify timing diagram.
Write
Input data
Output data
Verify
Address
Data
V
PP
V
PP
t
AS
t
AH
t
DS
t
DH
t
DF
t
OE
t
OES
t
PW
t
OPW
*
t
VPS
t
VCS
t
CES
V
CC
V
CC
CE
PGM
OE
V
CC
+1
V
CC
Note:
*
t
opw
is defined by the value shown in figure 6.4, High-Speed, High-Reliability Programming Flowchart.
Figure 6.5 PROM Write/Verify Timing