CAT24C128HU4IGT3 ON Semiconductor, CAT24C128HU4IGT3 Datasheet - Page 8

• Manufacturer Part Number: CAT24C128HU4IGT3
• Description: EEPROM DPPNV32TAPSUP/DOWN
• Manufacturer: ON Semiconductor

Specifications of CAT24C128HU4IGT3

• Product Category: EEPROM
• Rohs: yes

Read Operations
Immediate Read
the CAT24C128 will interpret this as a request for data
residing at the current byte address in memory. The
CAT24C128 will acknowledge the Slave address, will
immediately shift out the data residing at the current address,
and will then wait for the Master to respond. If the Master
does not acknowledge the data (NoACK) and then follows
up with a STOP condition (Figure 10), the CAT24C128
returns to Standby mode.
Selective Read
address counter must first be initialized as described under
Byte Write. If rather than following up the two address bytes
BUS ACTIVITY:
Upon receiving a Slave address with the R/W bit set to ‘1’,
To read data residing at a specific location, the internal
MASTER
P v 63
* = Don’t Care Bit
SLAVE
S
R
S
T
A
T
ADDRESS
SDA
SCL
SLAVE
WP
a
1
7
A
C
K
* *
ADDRESS
ADDRESS
a
BYTE
BYTE
13
−a
8
Figure 8. Page Write Sequence
A
C
K
8
a
0
Figure 9. WP Timing
ADDRESS
http://onsemi.com
BYTE
a
7
−a
t
SU:WP
0
9
8
C
A
K
with data, the Master instead follows up with an Immediate
Read sequence, then the CAT24C128 will use the 14 active
address bits to initialize the internal address counter and will
shift out data residing at the corresponding location. If the
Master does not acknowledge the data (NoACK) and then
follows up with a STOP condition (Figure 11), the
CAT24C128 returns to Standby mode.
Sequential Read
data byte, then the CAT24C128 will continue transmitting
data residing at subsequent locations until the Master
responds with a NoACK, followed by a STOP (Figure 12).
In contrast to Page Write, during Sequential Read the
address count will automatically increment to and then
wrap−around at end of memory (rather than end of page).
If during a Read session the Master acknowledges the 1
t
HD:WP
DATA
BYTE
d
n
1
7
A
C
K
DATA
BYTE
DATA
BYTE
n+1
d
8
0
C
A
K
A
C
K
DATA
BYTE
n+P
A
C
K
O
S
T
P
P
st