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X25040 Datasheet(PDF) 5 Page - IC MICROSYSTEMS

Part No. X25040
Description  SPI Serial E2PROM with Block LockTM Protection
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Maker  ICMIC [IC MICROSYSTEMS]
Homepage  http://www.icmic.com
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X25040 Datasheet(HTML) 5 Page - IC MICROSYSTEMS

 
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X25040
5
Figure 1. Read E2PROM Array Operation Sequence
Figure 2. Read Status Register Operation Sequence
Operational Notes
The X25040 powers-up in the following state:
• The device is in the low power standby state.
• A HIGH to LOW transition on
CS is required to
enter an active state and receive an instruction.
• SO pin is high impedance.
• The “write enable” latch is reset.
Data Protection
The following circuitry has been included to prevent
inadvertent writes:
• The “write enable” latch is reset upon power-up.
• A WREN instruction must be issued to set the “write
enable” latch.
CS must come HIGH at the proper clock count in
order to start a write cycle.
0123456789
10 11 12 13 14
76543210
DATA OUT
CS
SCK
SI
SO
MSB
HIGH IMPEDANCE
INSTRUCTION
6451 ILL F13
0123456789
10 11
12 13 14 15 16 17 18 19 20 21 22
6451 FHD F14
76543210
DATA OUT
CS
SCK
SI
SO
MSB
HIGH IMPEDANCE
INSTRUCTION
BYTE ADDRESS
7
6543210
8
9TH BIT OF ADDRESS


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