24AA174 Datasheet, PDF (9/12 Pages) Microchip Technology – 16K 1.8V Cascadable I2C™ Serial EEPROM with OTP Security Page

24AA174
FIGURE 8-3: SEQUENTIAL READ
BUS ACTIVITY
MASTER
SDA LINE
BUS ACTIVITY
CONTROL
BYTE
A
C
K
DATA n
DATA n + 1
DATA n + 2
A
A
A
C
C
C
K
K
K
S
T
O
DATA n + X
P
P
N
O
A
C
K
FIGURE 8-4: SECURITY CONTROL BYTE ALLOCATION
Operation
Read
Write
Control Code
0110
0110
Block
Select
R/W
000 1
000 0
START
READ/WRITE
SLAVE ADDRESS
R/W A
0110000
MSB
LSB
FIGURE 8-5: SECURITY PAGE READ
S
T
A
CONTROL
BUS MASTER
R
BYTE
ACTIVITY
T
WORD
ADDRESS (n)
S
T
A ^CONTROL
R
BYTE
T
DATA 0
SDA LINE
S 01 10
0
S 01 1 0
1
BUS ACTIVITY
R/W
R/W
A
A
A
A
C
C
C
C
K
K
K
K
BUS ACTIVITY
MASTER
SDA LINE
BUS ACTIVITY
DATA 1
DATA 2
DATA 3
A
A
A
A
C
C
C
C
K
K
K
K
FIGURE 8-6: SECURITY PAGE WRITE
BUS MASTER
ACTIVITY
SDA LINE
BUS ACTIVITY
S
T
A
R
CONTROL
BYTE
T
WORD
ADDRESS (n)
S 01 10
0
R/W
A
A
C
C
K
K
DATA (n)
DATA n + 1
A
C
K
S
T
O
DATA 15
P
P
N
O
A
C
K
S
DATA n + 15
T
O
P
P
A
N
C
O
K
A
C
K
 2004 Microchip Technology Inc.
DS21102G-page 9