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7.8.4
Memory Read Mode
• After the end of an auto-program, auto-erase, or status read operation, the command wait state
is entered. To read memory contents, a transition must be made to memory read mode by
means of a command write before the read is executed.
• Command writes can be performed in memory read mode, just as in the command wait state.
• Once memory read mode has been entered, consecutive reads can be performed.
• After power-on, memory read mode is entered.
Table 7.11 AC Characteristics in Memory Read Mode (1)
= 5.0 V ±10%, V
Conditions: V
CC
Item
Command write cycle
&( hold time
&( setup time
Data hold time
Data setup time
Write pulse width
:( rise time
:( fall time
A18 to A0
CE
OE
WE
IO7 to IO0
Note: Data is latched on the rising edge of WE.
Figure 7.16 Memory Read Mode Timing Waveforms after Command Write
= 0 V, Ta = 25°C ±5°C
SS
Symbol
Min
t
20
nxtc
t
0
ceh
t
0
ces
t
50
dh
t
50
ds
t
70
wep
t
r
t
f
Command write
t
t
wep
ceh
t
ces
t
t
f
r
DATA
t
dh
t
ds
Max
30
30
Memory read mode
ADDRESS STABLE
t
nxtc
Rev. 1.0, 02/00, page 159 of 1141
− − − − Preliminary − − − −
Unit
Notes
µs
ns
ns
ns
ns
ns
ns
ns
DATA
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