M93S46 ST Microelectronics, M93S46 Datasheet - Page 10

• Manufacturer Part Number: M93S46
• Description: 4Kbit / 2Kbit and 1Kbit 16-bit wide MICROWIRE Serial Access EEPROM with Block Protection
• Manufacturer: ST Microelectronics

M93S66, M93S56, M93S46
Figure 6. PREAD, PRWRITE and PREN Sequences
Note: For the meanings of An, Xn and Dn, please see Table 2 and Table 3.
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Protect
Register
READ
Protect
Register
WRITE
Protect
Register
ENABLE
PRE
S
Q
PRE
W
S
Q
W
S
D
D
PRE
D
1 1 0 Xn
1 0
1
CODE
CODE
CODE
OP
OP
0
OP
1
0
1
An
1
ADDR
ADDR
Xn X0
X0
A0
An
DATA
OUT
BUSY
A0 F
STATUS
CHECK
F = Protect Flag
READY
AI00891D