參數(shù)資料
型號(hào): 25AA080BST
廠商: Microchip Technology Inc.
英文描述: PHOTOTRANSISTOR NPN OPAQUE 1206
中文描述: 8K的SPI總線串行EEPROM
文件頁(yè)數(shù): 12/24頁(yè)
文件大?。?/td> 523K
代理商: 25AA080BST
25XX080A/B
DS21808B-page 12
2003 Microchip Technology Inc.
2.7
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
2.8
Power-On State
The 25XX080A/B 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 high-to-low-level transition on CS is required to
enter active state
TABLE 2-4:
WRITE-PROTECT FUNCTIONALITY MATRIX
WEL
(SR bit 1)
WPEN
(SR bit 7)
WP
(pin 3)
Protected Blocks
Unprotected Blocks
Status Register
0
x
x
Protected
Protected
Protected
1
0
x
Protected
Writable
Writable
1
1
0
(low)
Protected
Writable
Protected
1
1
1
(high)
Protected
Writable
Writable
x
= don’t care
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