PRELIMINARY
CY14B108K, CY14B108M
Document #: 001-47378 Rev. **
Page 22 of 29
Software Controlled STORE and RECALL Cycle
In the following table, the software controlled STORE and RECALL cycle parameters are listed.
[27, 28]
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
μ
s
t
SS
[31, 32]
Soft Sequence Processing Time
100
100
100
μ
s
Switching Waveforms
Figure 13. CE and OE Controlled Software STORE and RECALL Cycle
[28]
Figure 14. AutoStore Enable and 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
27. The software sequence is clocked with CE controlled or OE controlled reads.
28. The six consecutive addresses must be read in the order listed in
Table 2
. WE must be HIGH during all six consecutive cycles.
29. This is the amount of time it takes to take action on a soft sequence command. Vcc power must remain HIGH to effectively register command.
30. Commands such as STORE and RECALL lock out I/O until operation is complete which further increases this time. See the specific command.
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