CAT24C208 datasheet(8/13 Pages) CATALYST

Nome de Peças	CAT24C208

Descrição Electrónicos	8-Kb Dual Port Serial EEPROM

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Fabricante Electrônico	CATALYST [Catalyst Semiconductor]

Página de início	http://www.catalyst-semiconductor.com

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8 / 13 page

CAT24C208

8

Doc. No. 1044, Rev. F

Characteristics subject to change without notice

Figure 7. Random Access Read

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Figure 8. Sequential Read

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Figure 9. Byte Write

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Figure 10. Page Write

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The segment pointer is at the address 60h and is write-

only. This means that a memory access at 61h will give

undefined results. The segment pointer is a volatile

register. The device configuration register at 62/63 (hex)

is a non-volatile register. The configuration register will

be shipped in the erased (set to FFh) state.

The segment pointer is used to expand the available

DDC address space while maintaining backward com-

patibility with older DDC interfaces such as DDC2B. For

each value of the 8-bit segment pointer one segment

(256 bytes) is available at the A0/A1 pair. The standard

DDC 8-bit address is sufficient to address each of the

256 bytes within a segment. Note that if the segment

pointer is set to 00h then the device will behave like a

standard DDC2B EEPROM.

Read and write with segment pointer can expand the

addressable memory to 512 bytes in each bank with

wraparound to the next segment in the same bank only.

The two banks can be individually selected by the

configuration register and EDID Sel pin, as shown in

figure 19. The segments are selected by the two bits S

1S0

= 00 or 01 in the segment address.

Figures 7 to 10 show the random read, sequential read,

byte write and page write.

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