TSC87251G1A
Waveforms
P1= A14:8
P3= A7:0
Address
Data
T
AVGL
T
GHAX
P2= D7:0
T
DVGL
T
GHDX
V
PP
EA#/VPP
V
DD
T
SHGL
T
GLGH
T
GHSL
V
SS
ALE/PROG#
P0
T
EHSH
T
SLEL
Mode= 68h, 69h, 6Bh or 6Ch
Figure 24. EPROM Programming Waveforms
Mode= 28h, 29h or 2Bh
P0
T
ELQV
T
EHQZ
P1= A15:8
P3= A7:0
Address
T
AVQV
T
AXQX
P2= D7:0
Data
Figure 25. EPROM Verifying Waveforms
11.6. AC Characteristics – External Clock Drive and Logic Level References
Definition of symbols
Table 52. External Clock Timing Symbol Definitions
Signals
Conditions
C
Clock
L
Low
H
X
High
No Longer Valid
46
Rev. A – September 21, 1998