WS57C45 Просмотр технического описания (PDF) - STMicroelectronics
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WS57C45 Datasheet PDF : 9 Pages
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FIGURE 5. PROM PROGRAMMING WAVEFORMS
VIH
ADDRESS VIL
VIH
DATA
VIL
VPP
INIT/VPP
VIH
VIL
VIH
CP/PGM VIL
VIH
(OE /OES) / VFY VIL
PROGRAM
ADDRESS STABLE
t AS
t DS
DATA IN
t AS
t DH
t PW
tR
VERIFY
PROGRAM
OTHER BYTES
t DV
DATA OUT
t DZ
tF
t AH
t DV
t VP
FIGURE 6. INITIAL BYTE PROGRAMMING WAVEFORMS
VIH
VIL A2
VPP
VIH A1
VIL
VIH
DATA
VIL
VPP
INIT/VPP
VIH
VIL
VIH
CP/PGM
VIL
PROGRAM
tDS
tDH
tR
DATA IN
tAS
tAH
tPW
tR
tF
tF
FIGURE 7. PROGRAM SYNCHRONOUS ENABLE
VIH
A2
VIL
t AS
t PW
VIH
CP/PGM
VIL
(OE /OES) / VFY VIH
VIL
tR
VPP
VIH A1
VIL
VPP
INIT/VPP
VIH
VIL
tAS
tR
t AH
t AH
tF
tF
WS57C45
2-27
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