M27V160-100B1TR STMICROELECTRONICS [STMicroelectronics], M27V160-100B1TR Datasheet - Page 9

• Manufacturer Part Number: M27V160-100B1TR
• Description: 16 Mbit 2Mb x8 or 1Mb x16 Low Voltage UV EPROM and OTP EPROM
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

Figure 8. Programming and Verify Modes AC Waveforms
Figure 9. Programming Flowchart
YES
NO
A0-A19
Q0-Q15
BYTEV PP
V CC
E
G
= 25
FAIL
++n
V CC = 6.25V, V PP = 12.5V
CHECK ALL WORDS
NO
BYTEV PP =V IH
E = 50 s Pulse
1st: V CC = 5V
2nd: V CC = 3V
VERIFY
n = 0
Addr
Last
YES
YES
tVPHAV
tVCHAV
NO
++ Addr
AI00901B
tAVEL
tQVEL
tELEH
DATA IN
PROGRAM
PRESTO III Programming Algorithm
The PRESTO III Programming Algorithm allows
the whole array to be programed with a guaran-
teed margin in a typical time of 52.5 seconds. Pro-
gramming with PRESTO III consists of applying a
sequence of 50 s program pulses to each word
until a correct verify occurs (see Figure 9).
During programing and verify operation a MAR-
GIN MODE circuit is automatically activated to
guarantee that each cell is programed with enough
margin. No overprogram pulse is applied since the
verify in MARGIN MODE at V
3.6V provides the necessary margin to each pro-
grammed cell.
Program Inhibit
Programming of multiple M27V160s in parallel
with different data is also easily accomplished. Ex-
cept for E, all like inputs including G of the parallel
M27V160 may be common. A TTL low level pulse
applied to a M27V160’s E input and V
will program that M27V160. A high level E input in-
hibits the other M27V160s from being pro-
grammed.
Program Verify
A verify (read) should be performed on the pro-
grammed bits to determine that they were correct-
ly programmed. The verify is accomplished with E
at V
6.25V.
VALID
IH
tEHQX
and G at V
tQXGL
VERIFY
tGLQV
DATA OUT
IL
, V
PP
at 12.5V and V
CC
much higher than
tGHQZ
tGHAX
AI00744
PP
M27V160
at 12.5V,
CC
9/15
at