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CAT25C33Y14STE13 Datasheet(PDF) 9 Page - Catalyst Semiconductor |
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CAT25C33Y14STE13 Datasheet(HTML) 9 Page - Catalyst Semiconductor |
9 / 11 page Discontinued Parts 9 CAT25C33/65 Doc No. 1000, Rev. H © 2005 by Catalyst Semiconductor, Inc. Characteristics subject to change without notice Figure 9. HOLD HOLD HOLD 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) — — — — SK SI SO 0 0 0 0 0 0 1 0 ADDRESS Data Byte 1 012345678 21 22 23 24-31 32-39 Data Byte 2 Data Byte 3 Data Byte N CS OPCODE 7..1 0 24+(N-1)x8-1..24+(N-1)x8 24+Nx8-1 DATA IN HIGH IMPEDANCE CS SCK HOLD SO tCD tHD 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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