Cypress CY14B256K - Manual (Page 20)

CY14B256K
Document Number: 001-06431 Rev. *H Page 20 of 28
Software Controlled STORE/RECALL Cycles [20, 21]
Parameter
Alt.
Parameter
Description
25 ns 35 ns 45 ns
Unit
Min Max Min Max Min Max
t
RC
t
AVAV
STORE/RECALL Initiation Cycle Time 25 35 45 ns
t
SA
t
AVEL
Address Setup Time 0 0 0 ns
t
CW
t
ELEH
Clock Pulse Width 20 25 30 ns
t
HA
t
EHAX
Address Hold Time 1 1 1 ns
t
RECALL
RECALL Duration 170 170 170
μs
Figure 13. CE Controlled Software STORE/RECALL Cycle
[21]
Figure 14. OE Controlled Software STORE/RECALL Cycle [21]
t
RC
t
RC
t
SA
t
SCE
t
HA
t
STORE
/ t
RECALL
DATA VALID DATA VALID
6 # S S E R D D A 1 # S S E R D D A
HIGH IMPEDANCE
ADDRESS
CE
OE
DQ (DATA)
t
RC
t
RC
6 # S S E R D D A 1 # S S E R D D A ADDRESS
t
SA
t
SCE
t
HA
t
STORE
/ t
RECALL
DATA VALID DATA VALID
HIGH IMPEDANCE
CE
OE
DQ (DATA)
Notes
20. The software sequence is clocked with CE controlled or OE controlled READs.
21. The six consecutive addresses are read in the order listed in the
Mode Selection on page 6. WE is HIGH during all six consecutive cycles.
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