AT80251G2D-3CSUM(2006) View Datasheet(PDF) - Atmel Corporation
Part Name
Description
Manufacturer
AT80251G2D-3CSUM
(Rev.:2006)
(Rev.:2006)
Atmel Corporation
AT80251G2D-3CSUM Datasheet PDF : 77 Pages
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AT/TSC8x251G2D
Timings
Table 51. EPROM Programming AC timings; VDD = 4.5 to 5.5 V, TA = 0 to 40°C
Symbol
Parameter
Min
Max
Unit
TOSC
TAVGL
TGHAX
TDVGL
TGHDX
TELSH
TSHGL
TGHSL
TSLEH
TGLGH
XTAL1 Period
Address Setup to PROG# low
Address Hold after PROG# low
Data Setup to PROG# low
Data Hold after PROG#
ENABLE High to VPP
VPP Setup to PROG# low
VPP Hold after PROG#
ENABLE Hold after VPP
PROG# Width
83.5
48
48
48
48
48
10
10
0
90
250
110
ns
TOSC
TOSC
TOSC
TOSC
TOSC
μs
μs
ns
μs
Table 52. EPROM Verifying AC timings; VDD = 4.5 to 5.5 V, VDD = 2.7 to 5.5 V, TA = 0 to
40°C
Symbol
TOSC
TAVQV
TAXQX
TELQV
TEHQZ
Parameter
XTAL1 Period
Address to Data Valid
Address to Data Invalid
ENABLE low to Data Valid
Data Float after ENABLE
Min
83.5
0
0
0
Max
250
48
48
48
Unit
ns
TOSC
ns
TOSC
TOSC
Waveforms
Figure 23. EPROM Programming Waveforms
P1 = A15:8
P3 = A7:0
TAVGL
Address
TGHAX
P2 = D7:0
VPP
EA#/VPP VDD
VSS
ALE/PROG#
TDVGL
TSHGL
TELSH
Data
TGLGH
TGHDX
TGHSL
TSLEH
P0
Mode = 68h, 69h, 6Bh or 6Ch
59
4135F–8051–11/06
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