24AA04 MicrochipTechnology, 24AA04 Datasheet - Page 7

• Manufacturer Part Number: 24AA04
• Description: 4K/8K1.8VI2CSerialEEPROMs
• 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
BUS ACTIVITY
MASTER
SDA LINE
BUS ACTIVITY
(typical 10
CURRENT ADDRESS READ
RANDOM READ
SEQUENTIAL READ
Changes during SCL high are
CONTROL
BYTE
S
T
A
R
T
S
for 100 kHz, 1
A
C
K
CONTROL
BYTE
DATA n
S
S
T
A
R
T
A
C
K
for 400
A
C
K
CONTROL
ADDRESS (n)
BYTE
WORD
DATA n + 1
8.3
This pin must be connected to either V
If tied to Vss, normal memory operation is enabled
(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 24AA04/08 as a
serial ROM when WP is enabled (tied to Vcc).
8.4
These pins are not used by the 24AA04/08. They may
be left floating or tied to either V
A
C
K
S
T
A
R
T
S
A
C
K
A
C
K
CONTROL
DATA n + 2
WP
A0, A1, A2
BYTE
CC
, WRITE operations are inhibited. The
DATA n
A
C
K
A
C
K
24AA04/08
DATA (n)
SS
DATA n + X
N
O
A
C
K
or V
P
S
T
O
P
N
O
A
C
K
DS21053E-page 7
SS
CC
S
T
O
P
P
or V
.
N
O
A
C
K
CC
S
T
O
P
P
.