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X25320 Datasheet(PDF) 5 Page - IC MICROSYSTEMS

Part No. X25320
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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X25320 Datasheet(HTML) 5 Page - IC MICROSYSTEMS

 
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X25320
5
Figure 1. Read E
2PROM Array Operation Sequence
Operational Notes
The X25320 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.
Figure 2. Read Status Register Operation Sequence
0
1
2
3
4
5
6
7
8
9
10
20 21 22 23 24 25 26 27 28 29 30
7
6
5
4
3
2
1
0
DATA OUT
CS
SCK
SI
SO
MSB
HIGH IMPEDANCE
INSTRUCTION
16 BIT ADDRESS
1514
13
3
2
1
0
3063 ILL F03
0
1
2
3
4
5
6
7
8
9
10
11 12
13
14
7
6
5
4
3
2
1
0
DATA OUT
CS
SCK
SI
SO
MSB
HIGH IMPEDANCE
INSTRUCTION
3063 ILL F04


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