x25640 Intersil Corporation, x25640 Datasheet - Page 5
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x25640
Manufacturer Part Number
x25640
Description
Advanced Spi Serial E2prom With Block Locktm Protection
Manufacturer
Intersil Corporation
Datasheet
1.X25640.pdf
(14 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
x25640S
Manufacturer:
XICOR
Quantity:
20 000
X25640
Operational Notes
The X25640 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
• SO pin is high impedance.
• The “write enable” latch is reset.
Figure 1. Read E
Figure 2. Read Status Register Operation Sequence
enter an active state and receive an instruction.
SCK
SO
CS
SI
HIGH IMPEDANCE
2
PROM Array Operation Sequence
SCK
0
SO
CS
SI
1
INSTRUCTION
2
HIGH IMPEDANCE
3
0
4
1
INSTRUCTION
5
2
6
3
7
15 14 13
4
8
5
9
16 BIT ADDRESS
10
6
5
7
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
• CS must come HIGH at the proper clock count in
MSB
enable” latch.
order to start a write cycle.
20 21 22 23 24 25 26 27 28 29 30
8
7
3
9
6
2
10 11 12 13 14
5
1
DATA OUT
4
0
MSB
3
7
2
3089 ILL F09.1
6
1
5
DATA OUT
0
4
3
2
3089 ILL F03.1
1
0