CAT25C65GLSATE13 datasheet(9/11 Pages) CATALYST

9 / 11 page

Discontinued

Parts

CAT25C33/65

Doc No. 1000, Rev. H

Characteristics subject to change without notice

Figure 9.

HOLD

HOLD Timing

DESIGN CONSIDERATIONS

Figure 8. Page Write Instruction Timing

The CAT25C33/65 powers up in a write disable state

and in a low power standby mode. A WREN instruction

must be issued to perform any writes to the device after

power up. Also,on power up

CS should be brought low

to enter a ready state and receive an instruction. After

a successful byte/page write or status register write the

CAT25C33/65 goes into a write disable mode.

CS must

be set high after the proper number of clock cycles to

start an internal write cycle. Access to the array during

an internal write cycle is ignored and program-ming

is continued. On power up, SO is in a high impedance.

Note: Dashed Line = mode (1, 1) – – – –

Note: Dashed Line= mode (1, 1) — — — —

ADDRESS

Data

Byte 1

012345678

23 24-31

32-39

Data

Byte 2

Data

Byte 3

Data Byte N

OPCODE

7..1

24+(N-1)x8-1..24+(N-1)x8 24+Nx8-1

DATA IN

HIGH IMPEDANCE

SCK

HOLD

tCD

tHD

tCD

tLZ

tHZ

HIGH IMPEDANCE

When powering down, the supply should be taken down

to 0V, so that the CAT25C33/65 will be reset when power

is ramped back up. If this is not possible, then, following

a brown-out episode, the CAT25C33/65 can be reset by

refreshing the contents of the Status Register (See Appli-

cation Note AN10).

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