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FM24V10 データシート(PDF) 8 Page - Ramtron International Corporation |
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FM24V10 データシート(HTML) 8 Page - Ramtron International Corporation |
8 / 16 page FM24V10 - 1Mb I2C FRAM Rev. 2.0 May 2010 Page 8 of 16 Sleep Mode A low power mode called Sleep Mode is implemented on both FM24V10 and FM24VN10 devices. The device will enter this low power state when the Sleep command 0x86 is clocked-in. Sleep Mode entry can be entered as follows: 1. The master sends a START command. 2. The master sends Reserved Slave ID 0xF8 3. The master sends the I2C-bus slave address of the slave device it needs to identify. The last two bits are ‘Don’t care’ values (Page Select and R/W bits). Only one device must acknowledge this byte (the one that has the I2C-bus slave address). 4. The master sends a Re-START command. 5. The master sends Reserved Slave ID 0x86 6. The FM24V10 sends an ACK. 7. The master sends STOP to ensure the device enters sleep mode. Once in sleep mode, the device draws IZZ current, but the device continues to monitor the I2C pins. Once the master sends a Slave Address that the FM24V10 identifies, it will “wakeup” and be ready for normal operation within tREC (400 µs max.). As an alternative method of determining when the device is ready, the master can send read or write commands and look for an ACK. While the device is waking up, it will NACK the master until it is ready. S A P By Master By FM24V10 Start Address Stop S A Rsvd Slave ID (F8) Slave Address A Start Address Acknowledge Rsvd Slave ID (86) XX Figure 12. Sleep Mode Entry |
同様の部品番号 - FM24V10_10 |
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同様の説明 - FM24V10_10 |
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