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コンピュータ・ハードウェア Cypress Semiconductor CY62148EのPDF 仕様書をオンラインで閲覧またはダウンロードできます。Cypress Semiconductor CY62148E 11 ページ。 Mobl 4-mbit (512k x 8) static ram
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Switching Waveforms
Read Cycle No. 1 (Address Transition Controlled)
ADDRESS
DATA OUT
PREVIOUS DATA VALID
Read Cycle No. 2 (OE Controlled)
ADDRESS
CE
OE
HIGH IMPEDANCE
DATA OUT
t
V
PU
CC
SUPPLY
CURRENT
Write Cycle No. 1 (WE Controlled, OE HIGH During Write)
ADDRESS
CE
WE
OE
NOTE 21
DATA IO
Notes:
16. Device is continuously selected. OE, CE = V
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
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.
Document #: 38-05442 Rev. *F
[16, 17]
t
AA
t
OHA
[17, 18]
t
RC
t
ACE
t
DOE
t
LZOE
t
LZCE
50%
[19, 20]
t
SCE
t
AW
t
SA
t
HZOE
.
IL
.
IH
t
RC
RC
DATA VALID
t
WC
t
PWE
t
SD
DATA VALID
CY62148E MoBL
DATA VALID
t
HZOE
t
HZCE
HIGH
IMPEDANCE
t
PD
I
CC
50%
I
SB
t
HA
t
HD
Page 6 of 10
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