Datasheet

AT30TSE752A/754A/758A [DATASHEET]
Atmel-8854G-DTS-AT30TSE752A-754A-758A-Datasheet_102014
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10. Serial EEPROM
The AT30TSE752A/754A/758A contains an integrated 2Kb, 4Kb, or 8Kb Serial EEPROM that is a drop in functional
replacement for a stand alone 2-wire Serial EEPROM device enabling the added benefit of saving board space and
component cost. The Serial EEPROM can be used to permanently store system configuration, application specific, and
or user preference data.
10.1 Memory Organization
The Serial EEPROM in the AT30TSE752A/754A/758A is internally organized into pages or rows of data bytes. The
AT30TSE752A has 256 bytes and is internally organized with 16 pages of 16 bytes in each page. The AT30TSE754A
has 512 bytes and is internally organized with 32 pages of 16 bytes in each page. The AT30TSE758A has 1024 bytes
and is internally organized with 64 pages of 16 bytes in each page.
Table 10-1. AT30TSE752A/754A/758A Serial EEPROM Memory Organization
10.2 Memory Addressing
Every Serial EEPROM byte location within the AT30TSE752A/754A/758A can be individually accessed for Write or Read
operations. To access a byte location requires entering the desired byte address in the address field for a Write or Read
operation. The address field size will vary depending on the Serial EEPROM density; the AT30TSE752A requires an
8-bit address field, AT30TSE754A requires a 9-bit address field and the AT30TSE758A requires a 10-bit address field.
Table 10-2 shows the address byte and the relationship of the P0 and P1 memory page address bits and the device
address bits (A2-A0). The P0 bit is the MSB of the required 9-bit address field for the AT30TSE754A and the P0 and P1
bits are the MSBs of the required 10-bit address field for the AT30TSE758A. The P0 and P1 bits along with the word
address byte comprise the required 9-bit or 10-bit address field for the AT30TSE754A and AT30TSE758A, respectively,
to enable every byte in the memory to be individually selected for a Write or Read operation.
The software device address bits (A2-A0) must match the corresponding hard-wired device address pins (A
2-0
) for proper
communication (ACK) to occur.
Example: The AT30TSE752A requires that all three device address bits (A2-A0) must match the corresponding
hard-wired device address pins (A
2-0
). The AT30TSE754A requires the device address bits (A2 and A1)
must match the hard-wired device address pins (A
2
and A
1
). The AT30TSE758A requires only the device
address bit (A2) to match the hard-wired device address pin (A
2
).
Table 10-2. Serial EEPROM Address Byte
Atmel Device Density Bytes in each Page Number of Pages in Array
AT30TSE752A 2Kb (256 bytes) 16 16
AT30TSE754A 4Kb (512 bytes) 16 32
AT30TSE758A 8Kb (1024 bytes) 16 64
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Atmel Device Device Type Identifier Device Address Read/Write
AT30TSE752A 1 0 1 0 A2 A1 A0 R/W
AT30TSE754A 1 0 1 0 A2 A1 P0 R/W
AT30TSE758A 1 0 1 0 A2 P1 P0 R/W