cat34c02 Catalyst Semiconductor, cat34c02 Datasheet - Page 11

• Manufacturer Part Number: cat34c02
• Description: 2-kb I?c Eeprom For Ddr2 Dimm Serial Presence Detect
• Manufacturer: Catalyst Semiconductor

Table 2. SWP Commands
Note:
(1) Here A
(2) 1 stands for ‘Set’, 0 stands for ‘Not Set’, X stands for ‘don’t care’.
Figure 12. Software Write Protect (Write)
Figure 13. Software Write Protect (Read)
© Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
Action
PSWP
RSWP
RSWP
Clear
Set
Set
GND
GND GND GND
GND GND
2
WP
V
V
V
, A
Control Pin Levels
X
X
X
X
X
X
X
CC
CC
CC
1
and A
GND GND
GND GND
GND GND
GND GND
GND
GND
GND
A
A
A
A
A
2
2
2
2
2
0
are either at V
V
V
V
V
BUS ACTIVITY:
A
A
A
A
A
CC
CC
CC
CC
1
1
1
1
1
SDA LINE
MASTER
V
V
V
V
V
V
V
V
V
A
A
A
A
A
(1)
HV
HV
HV
HV
HV
HV
HV
HV
HV
0
0
0
0
0
CC
or GND.
PSWP RSWP b
Flag State
1
0
0
0
1
0
0
0
0
1
0
0
0
S
S
T
A
R
T
BUS ACTIVITY:
ADDRESS
X
X
X
X
X
1
0
0
0
X
X
X
X
SLAVE
SDA LINE
(2)
MASTER
7
0110
to b
Slave Address
C
A
K
S
R
4
S
T
A
T
X
11
X = Don't Care
X X X X X X X
b
A
A
A
A
0
0
0
0
0
0
0
0
0
ADDRESS
3
2
2
2
2
ADDRESS
BYTE
SLAVE
b
A
A
A
A
0
0
0
0
0
1
1
1
1
2
1
1
1
1
b
A
A
A
A
1
1
1
1
1
1
1
1
1
1
0
0
0
0
A
C
K
A
C
K
b
X
X
X
X
or
0
0
1
0
0
1
0
0
1
0
X
P
O
S
P
T
O
N
A
C
K
X X X X X X X
ACK
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
?
DATA
Address
Byte
X
X
X
X
X
X
A
C
K
or
P
O
S
T
P
O
N
A
C
K
ACK
Yes
Yes
Yes
Yes
Yes
Yes
?
Data
Byte
X
X
X
X
X
X
Doc No. MD-1095, Rev. K
ACK
Yes
Yes
Yes
CAT34C02
No
No
No
?
Cycle
Write
Yes
Yes
Yes
No
No
No