Cypress CY14B108N Manual De Usuario
PRELIMINARY
CY14B108L, CY14B108N
Document #: 001-45523 Rev. *B
Page 14 of 24
Software Controlled STORE/RECALL Cycle
In the following table, the software controlled STORE and RECALL cycle parameters are listed.
Parameters
Description
20 ns
25 ns
45 ns
Unit
Min
Max
Min
Max
Min
Max
t
RC
STORE/RECALL Initiation Cycle Time
20
25
45
ns
t
SA
Address Setup Time
0
0
0
ns
t
CW
Clock Pulse Width
15
20
30
ns
t
HA
Address Hold Time
0
0
0
ns
t
RECALL
RECALL Duration
200
200
200
μs
Switching Waveforms
Figure 11. CE and OE Controlled Software STORE/RECALL Cycle
Figure 12. Autostore Enable/Disable Cycle
t
RC
t
RC
t
SA
t
CW
t
CW
t
SA
t
HA
t
LZCE
t
HZCE
t
HA
t
HA
t
HA
t
DELAY
t
STORE
/t
RECALL
t
HHHD
t
LZHSB
High Impedance
Address #1
Address #6
Address
CE
OE
HSB (STORE only)
DQ (DATA)
RWI
t
RC
t
RC
t
SA
t
CW
t
CW
t
SA
t
HA
t
LZCE
t
HZCE
t
HA
t
HA
t
HA
t
DELAY
Address #1
Address #6
Address
CE
OE
DQ (DATA)
t
SS
Notes
22. The software sequence is clocked with CE controlled or OE controlled reads.
23. The six consecutive addresses must be read in the order listed in
23. The six consecutive addresses must be read in the order listed in
on page 6. WE must be HIGH during all six consecutive cycles.