24AA256-EMC MICROCHIP [Microchip Technology], 24AA256-EMC Datasheet - Page 15

• Manufacturer Part Number: 24AA256-EMC
• Manufacturer: MICROCHIP [Microchip Technology]

5.7.1
Chip Select bits A2, A1 and A0 can be used to expand
the contiguous address space by adding up to eight
24XXs on the same bus. Software can use the three
address bits of the control byte as the three Most
Significant bits of the address byte. For example, in the
24XX32 devices, software can use A0 of the control
byte as address bit A12; A1 as address bit A13; and A2
as address bit A14 (Table 5-1). It is not possible to
sequentially read across device boundaries.
TABLE 5-1:
© 2007 Microchip Technology Inc.
1K (24C01C)
1K (24XX014)
2K (24C02C)
2K (24XX024/025)
32K (24XX32)
64K (24XX64)
128K (24XX128)
256K (24XX256)
512K (24XX512)
* Up to two 24XX128 or 24XX256 devices in the MSOP package can be added for up to 256 kb or 512 kb of address
space, respectively. Bits A0 and A1 must be set to ‘0’.
CONTIGUOUS ADDRESSING
ACROSS MULTIPLE DEVICES
CONTROL BYTE ADDRESS BITS
Maximum
Devices
8*
8*
8
8
8
8
8
8
8
Address Space
Contiguous
Maximum
256 Kb
512 Kb
16 Kb
16 Kb
24AAXX/24LCXX/24FCXX
1 Mb
2 Mb
4 Mb
8 Kb
8 Kb
Chip Select Bit
A16*
A17*
A10
A10
A10
A10
A14
A15
A18
A2
Chip Select Bit
A15*
A16*
A13
A14
A17
A1
A9
A9
A9
A9
DS21930B-page 15
Chip Select Bit
A12
A13
A14
A15
A16
A0
A8
A8
A8
A8