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CY7C199CN
Document #: 001-06435 Rev. *B
Page 7 of 14
Timing Waveforms
Data Retention Waveform
Read Cycle 1 [9, 10]
Read Cycle 2 [11, 12]
CE
DATA RETENTION MODE
t
CDR
t
R
V
CC
Address
Data Out
Previous Data Valid
Data Valid
t
RC
t
AA
t
OHA
Address
CE
OE
Data Out
Data Valid
t
RC
High Z
t
ACE
t
HZCE
t
HZOE
t
DOE
t
LZOE
t
LZCE
V
CC
Current
I
CC
I
SB
t
PU
50%
50%
t
PD
High Z
Notes
9. Device is continuously selected. OE = VIL = CE.
10. WE is HIGH for read cycle.
11. This cycle is OE controlled and WE is HIGH read cycle.
12. Address valid before or similar with CE transition LOW.
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