參數(shù)資料
型號(hào): CAT150089RWI-GT3
廠商: ON SEMICONDUCTOR
元件分類: PROM
英文描述: 8K X 1 SPI BUS SERIAL EEPROM, PDSO8
封裝: 0.150 INCH, HALOGEN FREE AND ROHS COMPLIANT, MS-012, SOIC-8
文件頁數(shù): 14/15頁
文件大小: 174K
代理商: CAT150089RWI-GT3
CAT15008, CAT15016
Doc. No. MD-1125 Rev. B
8
2008 SCILLC. All rights reserved.
Characteristics subject to change without notice
WRITE OPERATIONS
The CAT15008/16 device powers up into a write
disable state. The device contains a Write Enable
Latch (WEL) which must be set before attempting to
write to the memory array or to the status register. In
addition, the address of the memory location(s) to be
written must be outside the protected area, as defined
by BP0 and BP1 bits from the status register.
Write Enable and Write Disable
The
internal
Write
Enable
Latch
and
the
corresponding Status Register WEL bit are set by
sending the WREN instruction to the CAT15008/16.
Care must be taken to
take the CS
input high after the WREN instruction, as
otherwise the Write Enable Latch will not be properly
set. WREN timing is illustrated in Figure 4. The WREN
instruction must be sent prior any WRITE or WRSR
instruction.
The internal write enable latch is reset by sending the
WRDI instruction as shown in Figure 5. Disabling write
operations by resetting the WEL bit, will protect the
device against inadvertent writes.
Figure 4. WREN Timing
Note: Dashed Line = mode (1, 1) - - - - - -
Figure 5. WRDI Timing
Note: Dashed Line = mode (1, 1) - - - - - -
SCK
SI
CS
SO
000
0
11
0
HIGH IMPEDANCE
SCK
SI
CS
SO
0
000
10
0
HIGH IMPEDANCE
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