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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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FM25H20-DGTR датащи(PDF) 8 Page - Ramtron International Corporation |
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FM25H20-DGTR датащи(HTML) 8 Page - Ramtron International Corporation |
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8 / 15 page  FM25H20 - 2Mb SPI FRAM Rev. 2.2 Sept. 2010 Page 8 of 15 Hold The /HOLD pin can be used to interrupt a serial operation without aborting it. If the bus master pulls the /HOLD pin low while C is low, the current operation will pause. Taking the /HOLD pin high while C is low will resume an operation. The transitions of /HOLD must occur while C is low, but the C and /S pins can toggle during a hold state. Figure 9. Memory Write Figure 10. Memory Read Sleep Mode A low power mode called Sleep Mode is implemented on the FM25H20. The device will enter this low power state when the SLEEP op-code (B9h) is clocked in, and the device seeing the rising edge of /S. Once in sleep mode, the C and D pins are ignored and Q will go to a hi-Z state, but the device continues to monitor the /S pin. On the next falling edge of /S, the device will return to normal operation within tREC (450 µs max.). The Q pin remains in a hi-Z state during the wakeup period. The FM25H20 will not necessarily respond to an opcode within the wakeup period. To start the wakeup procedure, the controller may send a “dummy” read, for example, and wait the remaining tREC time. Figure 11. Sleep Mode Entry S C D Q Sleep entry 0 1 2 34 5 6 7 0 1 2 34 5 64 5 6 7 0 1 2 3456 7 op-code 0 0 0 0 0 0 1 MSB 18-bit Address x x x x x 17 3210 7 654321 0 LSB MSB LSB Data 1 x S C D Q 0 1 2 3 4 567 0 1 2 34 5 4 567 0 1 2 34 5 6 7 op-code 0 0 0 0 0 0 1 0 MSB 18-bit Address x 3 2 1 0 76 54 321 0 LSB MSB LSB Data 17 6 x x x x x S C D Q |
Аналогичный номер детали - FM25H20-DGTR |
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Аналогичное описание - FM25H20-DGTR |
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