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NM93CS46LEMT8 Datasheet(PDF) 7 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part # NM93CS46LEMT8
Description  256-/1024-/2048-/4096-Bit Serial EEPROM with Extended Voltage (2.7V to 5.5V) and Data Protect (MICROWIRE-TM Bus Interface)
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

NM93CS46LEMT8 Datasheet(HTML) 7 Page - National Semiconductor (TI)

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Instruction Set for the NM93CS06L and NM93CS46L
Instruction
SB
Op Code
Address
Data
PRE
PE
Comments
READ
1
10
A5 – A0
0
X
Reads data stored in memory starting at specified address
WEN
1
00
11XXXX
0
1
Enable all programming modes
WRITE
1
01
A5 – A0
D15 – D0
0
1
Writes address if unprotected
WRALL
1
00
01XXXX
D15 – D0
0
1
Writes all registers Valid only when Protect Register is
cleared
WDS
1
00
00XXXX
0
X
Disables all programming modes
PRREAD
1
10
XXXXXX
1
X
Reads address stored in Protect Register
PREN
1
00
11XXXX
1
1
Must immediately precede PRCLEAR PRWRITE and
PRDS instructions
PRCLEAR
1
11
111111
1
1
Clears the Protect Register so that no registers are
protected from WRITE
PRWRITE
1
01
A5 – A0
1
1
Programs address into Protect Register Thereafter
memory addresses t the address in Protect Register are
protected from WRITE
PRDS
1
00
000000
1
1
ONE TIME ONLY
instruction after which the address in the
Protect Register cannot be altered
Note
Address bits A5 and A4 become ‘‘Don’t Care’’ for the NM93CS06L
Instruction Set for the NM93CS56L and NM93CS66L
Instruction
SB
Op Code
Address
Data
PRE
PE
Comments
READ
1
10
A7 – A0
0
X
Reads data stored in memory starting at specified address
WEN
1
00
11XXXXXX
0
1
Enable all programming modes
WRITE
1
01
A7 – A0
D15 – D0
0
1
Writes address if unprotected
WRALL
1
00
01XXXXXX
D15 – D0
0
1
Writes all registers Valid only when Protect Register is
cleared
WDS
1
00
00XXXXXX
0
X
Disables all programming modes
PRREAD
1
10
XXXXXXXX
1
X
Reads address stored in Protect Register
PREN
1
00
11XXXXXX
1
1
Must immediately precede PRCLEAR PRWRITE and
PRDS instructions
PRCLEAR
1
11
11111111
1
1
Clears the ‘‘protect register’’ so that no registers are
protected from WRITE
PRWRITE
1
01
A7 – A0
1
1
Programs address into Protect Register Thereafter
memory addresses t the address in Protect Register are
protected from WRITE
PRDS
1
00
00000000
1
1
ONE TIME ONLY
instruction after which the address in the
Protect Register cannot be altered
Note
Address bit A7 becomes ‘‘Don’t Care’’ for the NM93CS56L
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