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M93S46-W Scheda tecnica(PDF) 11 Page - STMicroelectronics

Il numero della parte M93S46-W
Spiegazioni elettronici  4 Kbit, 2 Kbit and 1 Kbit serial MICROWIRE bus EEPROM with write protection
Download  32 Pages
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Produttore elettronici  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M93S46-W Scheda tecnica(HTML) 11 Page - STMicroelectronics

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M93S46-W M93S56-W M93S66-W
Instructions
DocID5124 Rev 7
11/32
Instruction
Description
W
PRE
Start
bit
Op-
code
Address
(1)
Data
Required
clock
cycles
Additional
comments
PRCLEAR
Protection
Register Clear
1
1
1
11
111111
-
9
Protect Flag is
also cleared
(cleared Flag = 1)
PREN
Protection
Register
Enable
1
1
1
00
11XXXX
-
9
-
PRDS
Protection
Register
Disable
1
1
1
00
000000
-
9
OTP bit is set
permanently
Note:
(1)
X = Don’t Care bit.
Table 3: Instruction set for the M93S66, M93S56
Instruction
Description
W
PRE
Start
bit
Op-
code
Address
(1)(2)
Data
Required
clock
cycles
Additional
comments
READ
Read Data
from Memory
X
0
1
10
A7-A0
Q15-Q0
-
-
WRITE
Write Data to
Memory
1
0
1
01
A7-A0
D15-D0
27
Write is
executed if the
address is not
inside the
Protected area
PAWRITE
Page Write to
Memory
1
0
1
11
A7-A0
N x
D15-D0
11 + N x
16
Write is
executed if all
the N addresses
are not inside
the Protected
area
WRAL
Write All
Memory with
same Data
1
0
1
00
01XXXXXX
D15-D0
27
Write all data if
the Protection
Register is
cleared
WEN
Write Enable
1
0
1
00
11XXXXXX
-
11
-
WDS
Write Disable
X
0
1
00
00XXXXXX
-
11
-
PRREAD
Protection
Register
Read
X
1
1
10
XXXXXXXX
Q7-Q0
+ Flag
-
Data Output =
Protection
Register content
+ Protection Flag
bit
PRWRITE
Protection
Register
Write
1
1
1
01
A7-A0
-
11
Data above
specified
address A7-A0
are protected
PRCLEAR
Protection
Register
Clear
1
1
1
11
11111111
-
11
Protect Flag is
also cleared
(cleared Flag =
1)


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