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M93S56-125 Datasheet(PDF) 9 Page - STMicroelectronics

Part # M93S56-125
Description  Automotive 4-Kbit, 2-Kbit and 1-Kbit MICROWIRE serial EEPROM with block protection
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M93S56-125 Datasheet(HTML) 9 Page - STMicroelectronics

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M93S66-125 M93S56-125 M93S46-125
Instructions
Doc ID 022567 Rev 1
9/28
Table 3.
Instruction set for the M93S56, M93S66
Instruction
Description
W
PRE
Start
bit
Opcode
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
10
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
X1
1
10
XXXXXXX
X
Q7-Q0
+ Flag
Data Output =
Protection
Register content
+ Protection Flag
bit
PRWRITE
Protection
Register
Write
11
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)
PREN
Protection
Register
Enable
1
1
1
00
11XXXXXX
11
PRDS
Protection
Register
Disable
1
1
1
00
00000000
11
OTP bit is set
permanently
1.
X = Don't Care bit.
2.
Address bit A7 is not decoded by the M93S56-125.


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