Switching waveforms – Cypress CY62148E User Manual
Page 6
CY62148E MoBL
®
Document #: 38-05442 Rev. *F
Page 6 of 10
Switching Waveforms
Read Cycle No. 1 (Address Transition Controlled)
Read Cycle No. 2 (OE Controlled)
Write Cycle No. 1 (WE Controlled, OE HIGH During Write)
PREVIOUS DATA VALID
DATA VALID
RC
t
AA
t
OHA
t
RC
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. Device is continuously selected. OE, CE = V
IL
.
17. WE is HIGH for read cycles.
18. Address valid before or similar to CE transition LOW.
19. Data IO is high impedance if OE = V
IH
.
20. If CE goes HIGH 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.