24LC04 MicrochipTechnology, 24LC04 Datasheet - Page 7

• Manufacturer Part Number: 24LC04
• Description: 4K/8K2.5VI2CSerialEEPROMs
• Manufacturer: MicrochipTechnology

FIGURE 7-1:
FIGURE 7-2:
FIGURE 7-3:
8.0
8.1
This is a Bi-directional pin used to transfer addresses
and data into and data out of the device. It is an open
drain terminal, therefore the SDA bus requires a pullup
resistor to V
kHz).
For normal data transfer SDA is allowed to change only
during SCL low.
reserved for indicating the START and STOP condi-
tions.
8.2
This input is used to synchronize the data transfer from
and to the device.
1996 Microchip Technology Inc.
BUS ACTIVITY
MASTER
SDA LINE
BUS ACTIVITY
PIN DESCRIPTIONS
SDA Serial Address/Data Input/Output
SCL Serial Clock
CC
BUS ACTIVITY
MASTER
SDA LINE
BUS ACTIVITY
(typical 10K for 100 kHz, 1K for 400
BUS ACTIVITY
MASTER
SDA LINE
BUS ACTIVITY
CURRENT ADDRESS READ
RANDOM READ
SEQUENTIAL READ
Changes during SCL high are
CONTROL
BYTE
S
T
A
R
T
S
A
C
K
CONTROL
BYTE
DATA n
S
S
T
A
R
T
A
C
K
A
C
K
CONTROL
ADDRESS (n)
BYTE
WORD
DATA n + 1
8.3
This pin must be connected to either V
If tied to V
(read/write the entire memory).
If tied to V
entire memory will be write-protected. Read operations
are not affected.
This feature allows the user to use the 24LC04B/08B as
a serial ROM when WP is enabled (tied to V
8.4
These pins are not used by the 24LC04B/08B. They
may be left floating or tied to either V
A
C
K
A
C
K
S
T
A
R
T
S
A
C
K
DATA n + 2
CONTROL
WP
A0, A1, A2
BYTE
CC
SS
, WRITE operations are inhibited. The
, normal memory operation is enabled
DATA n
24LC04B/08B
A
C
K
A
C
K
DATA (n)
DATA n + X
N
O
A
C
K
P
S
T
O
P
SS
N
O
C
A
K
DS21051E-page 7
SS
S
T
O
P
P
or V
or V
CC
CC
N
O
C
A
K
CC
S
T
O
P
).
.
P
.