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25C320E/P 데이터시트(PDF) 12 Page - Microchip Technology

부품명 25C320E/P
상세설명  32K SPI Bus Serial EEPROM
PDF  24 Pages
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제조업체  MICROCHIP [Microchip Technology]
홈페이지  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

25C320E/P 데이터시트(HTML) 12 Page - Microchip Technology

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25AA320/25LC320/25C320
DS21227E-page 12
 2004 Microchip Technology Inc.
3.7
Data Protection
The following protection has been implemented to
prevent inadvertent writes to the array:
• The write enable latch is reset on power-up
•A WRITE ENABLE instruction must be issued to
set the write enable latch
• After a byte write, page write or Status register
write, the write enable latch is reset
•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 programming is continued
3.8
Power-On State
The 25XX320 powers on in the following state:
• The device is in low-power Standby mode
(CS = 1)
• The write enable latch is reset
• SO is in high-impedance state
• A low level on CS is required to enter active state
.
TABLE 3-3:
WRITE-PROTECT FUNCTIONALITY MATRIX
WPEN
WP
WEL
Protected Blocks
Unprotected Blocks
Status Register
xx
0
Protected
Protected
Protected
0x
1
Protected
Writable
Writable
1
Low
1
Protected
Writable
Protected
x
High
1
Protected
Writable
Writable



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