7.1 Byte Write

The AT24CSW01X/AT24CSW02X supports the writing of a single 8-bit byte. Selecting a data word in the AT24CSW01X requires a 7-bit word address, while selecting a data word in the AT24CSW02X requires an 8-bit word address.

Upon receipt of the proper device address and the word address bytes, the EEPROM will send an ACK. The device will then be ready to receive the 8-bit data word. Following receipt of the 8‑bit data word, the EEPROM will respond with an ACK. The addressing device, such as a bus client, must then terminate the write operation with a Stop condition. At that time, the EEPROM will enter an internally self-timed write cycle, which will be completed within tWR, while the data word is being programmed into the nonvolatile EEPROM. All inputs are disabled during this write cycle and the EEPROM will not respond until the write is complete.

Figure 7-1. Byte Write
Note:
  1. The A7 bit falls outside of the addressable 1K range and is therefore a don’t care value on an AT24CSW01x.
  2. # indicates the hardware address value that is managed by the ordering code of the device (see Table 6-2).