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CAT28F020N-12 Datasheet(PDF) 7 Page - Catalyst Semiconductor

No. de pieza CAT28F020N-12
Descripción Electrónicos  2 Megabit CMOS Flash Memory
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Fabricante Electrónico  CATALYST [Catalyst Semiconductor]
Página de inicio  http://www.catalyst-semiconductor.com
Logo CATALYST - Catalyst Semiconductor

CAT28F020N-12 Datasheet(HTML) 7 Page - Catalyst Semiconductor

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CAT28F020
7
Doc. No. 25037-00 2/98 F-1
FUNCTION TABLE(1)
Pins
Mode
CE
OE
WE
VPP
I/O
Notes
Read
VIL
VIL
VIH
VPPL
DOUT
Output Disable
VIL
VIH
VIH
X
High-Z
Standby
VIH
XX
VPPL
High-Z
Signature (MFG)
VIL
VIL
VIH
X
31H
A0 = VIL, A9 = 12V
Signature (Device)
VIL
VIL
VIH
X
BDH
A0 = VIH, A9 = 12V
Program/Erase
VIL
VIH
VIL
VPPH
DIN
See Command Table
Write Cycle
VIL
VIH
VIL
VPPH
DIN
During Write Cycle
Read Cycle
VIL
VIL
VIH
VPPH
DOUT
During Write Cycle
WRITE COMMAND TABLE
Commands are written into the command register in one or two write cycles. The command register can be altered
only when VPP is high and the instruction byte is latched on the rising edge of WE. Write cycles also internally latch
addresses and data required for programming and erase operations.
Pins
First Bus Cycle
Second Bus Cycle
Mode
Operation
Address
DIN
Operation
Address
DIN
DOUT
Set Read
Write
X
00H
Read
AIN
DOUT
Read Sig. (MFG)
Write
X
90H
Read
00
31H
Read Sig. (Device)
Write
X
90H
Read
01
BDH
Erase
Write
X
20H
Write
X
20H
Erase Verify
Write
AIN
A0H
Read
X
DOUT
Program
Write
X
40H
Write
AIN
DIN
Program Verify
Write
X
C0H
Read
X
DOUT
Reset
Write
X
FFH
Write
X
FFH
Note:
(1) Logic Levels: X = Logic ‘Do not care’ (VIH, VIL, VPPL, VPPH)


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