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MoBL
®
CY62128E
Document #: 38-05485 Rev. *F Page 6 of 12
Switching Waveforms
Figure 1. Read Cycle 1 (Address Transition Controlled)
[16, 17]
Figure 2. Read Cycle No. 2 (OE Controlled)
[11, 17, 18
]
Figure 3. Write Cycle No. 1 (WE Controlled)
[11, 15, 19, 20]
PREVIOUS DATA VALID DATA VALID
RC
t
AA
t
OHA
tRC
ADDRESS
DATA OUT
50%
50%
DATA VALID
t
RC
t
ACE
t
DOE
t
LZOE
t
LZCE
t
PU
HIGH IMPEDANCE
t
HZOE
t
HZCE
t
PD
IMPEDANCE
I
CC
I
SB
HIGH
ADDRESS
CE
DATA OUT
V
CC
SUPPLY
CURRENT
OE
DATA VALID
t
HD
t
SD
t
PWE
t
SA
t
HA
t
AW
t
SCE
t
WC
t
HZOE
ADDRESS
CE
WE
DATA IO
OE
NOTE
21
Notes:
16.The device is continuously selected. OE
, CE
1
= V
IL
, CE
2
= V
IH
.
17.WE
is HIGH for read cycle.
18.Address valid before or similar to CE
1
transition LOW and CE
2
transition HIGH.
19.Data IO is high impedance if OE
= V
IH
.
20.If CE
1
goes HIGH or CE
2
goes LOW simultaneously with WE HIGH, the output remains in high impedance state.
21.During this period, the IOs are in output state and input signals must not be applied.
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