Cypress CY14B108M - Manual (Page 22)

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
μs
t
SS
[31, 32]
Soft Sequence Processing Time 100 100 100
μs
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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