WS57C45 STMicroelectronics, WS57C45 Datasheet - Page 7

• Manufacturer Part Number: WS57C45
• Description: HIGH-SPEED 2K x 8 REGISTERED CMOS PROM/RPROM
• Manufacturer: STMicroelectronics

FIGURE 5. PROM PROGRAMMING WAVEFORMS
FIGURE 6. INITIAL BYTE PROGRAMMING WAVEFORMS
FIGURE 7. PROGRAM SYNCHRONOUS ENABLE
(OE /OE
(OE/OE
CP/PGM
INIT/V
DATA
ADDRESS
CP/PGM
INIT/V
S
CP/PGM
INIT/V
)/ VFY
PP
S
DATA
)/ VFY
PP
V
V
PP
V
V
V
V
V
V
V
V
V
V
PP
PP
IH
IL
IH
IL
IH
IL
IH
IL
IH
IL
V
V
V
V
V
V
V
V
V
V
V
V
PP
PP
V
V
IH
IL
IH
IL
IH
IL
IH
IL
IH
IL
V
V
V
V
V
V
V
V
V
PP
IH
A
A
IL
IL
IL
IH
IL
IH
IL
IH
IH
2
1
A
1
t
R
A
2
t
t
R
R
t
AS
t
t
AS
t
AS
t
R
AS
t
ADDRESS STABLE
DS
t
DS
DATA IN
PROGRAM
t
t
R
AS
DATA IN
t
PW
t
PW
t
DH
t
DV
t
DH
PROGRAM
t
PW
t
VP
DATA OUT
VERIFY
t
DV
t
t
AH
DZ
t
AH
OTHER BYTES
t
AH
t
F
PROGRAM
t
F
t
F
t
AH
t
F
t
F
WS57C45
2-27