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| PRELIMINARY | CY14B108K, CY14B108M | |||||||||
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Software Controlled STORE and RECALL Cycle |
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In the following table, the software controlled STORE and RECALL cycle parameters are listed. [27, 28] |
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Parameters |
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| Description | 20 ns | 25 ns |
| 45 ns | Unit |
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| Min | Max | Min | Max |
| Min | Max |
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tRC | STORE/RECALL Initiation Cycle Time | 20 |
| 25 |
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| 45 |
| ns |
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tSA | Address Setup Time | 0 |
| 0 |
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| 0 |
| ns |
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tCW | Clock Pulse Width | 15 |
| 20 |
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| 30 |
| ns |
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tHA | Address Hold Time | 0 |
| 0 |
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| 0 |
| ns |
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tRECALL | RECALL Duration |
| 200 |
| 200 |
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| 200 | μs |
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tSS [31, 32] | Soft Sequence Processing Time |
| 100 |
| 100 |
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| 100 | μs |
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Switching Waveforms
Figure 13. CE and OE Controlled Software STORE and RECALL Cycle[28]
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| tRC | tRC |
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Address |
| Address #1 | Address #6 |
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| tSA | tCW | tCW |
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CE |
| tHA | tHA |
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t |
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SA | tHA | t | |||
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| HA | |
OE |
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| tDELAY | tHHHD | |
HSB (STORE only) | tLZCE | tHZCE |
| tLZHSB | |
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DQ (DATA) |
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| High Impedance | |
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| tSTORE/tRECALL | ||
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RWI |
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Figure 14. AutoStore Enable and Disable Cycle
| tRC |
Address | Address #1 |
tSA | tCW |
CE |
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tSA |
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OE |
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tLZCE |
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DQ (DATA) |
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| tRC | |
| Address #6 | |
| tCW | |
tHA | tHA | |
tHA | ||
t | ||
| HA | |
tHZCE | tSS | |
tDELAY | ||
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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.
Document #: | Page 22 of 29 |
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