Datasheet

7
Atmel AT30TSE002B [DATASHEET]
8711G–SEEPR–5/12
5. Memory Organization
AT30TSE002B, 2K Serial EEPROM: The 2K memory is internally organized with 16 pages of 16-bytes each. Random
word addressing requires an 8-bit data word address.
6. Device Operation
Clock and Data Transitions: The SDA pin is normally pulled high with an external device. Data on the SDA pin may
change only during SCL low time periods. (See Figure 6-4) Data changes during SCL high periods will indicate a start or
stop condition as defined below.
Start Condition: A high-to-low transition of SDA with SCL high is a start condition which must precede any other
command (see Figure 6-5).
Stop Condition: A low-to-high transition of SDA with SCL high is a stop condition. After a read sequence, the Stop
command will place the device in a standby power mode (see Figure 6-5).
Acknowledge: All addresses and data words are serially transmitted to and from the EEPROM in 8-bit words. The
device sends a zero to acknowledge that it has received each word. This happens during the ninth clock cycle.
Standby Mode: The AT30TSE002B features a low-power standby mode which is enabled:
a. Upon power-up.
b. After the receipt of the Stop bit and the completion of any internal operations. The temperature sensor must be dis-
abled by the user for low-power standby mode.
2-wire Software Reset: After an interruption in protocol, power loss or system reset, any 2-wire part can be reset by
following these steps:
1. Create a start bit condition.
2. Clock nine cycles.
3. Create another start bit followed by stop bit condition as shown below.
The device is ready for next communication after the above steps have been completed.
Figure 6-1. 2-wire Software Reset
SCL
SDA
123 89
Start Bit Start Bit
Dummy Clock Cycles
Stop Bit