AT24C16C_14 Datasheet, PDF (10/23 Pages) ATMEL Corporation – IC-Compatible, (2-Wire) Serial EEPROM

Page Write: The 16K EEPROM devices are capable of a 16-byte Page Write.
A Page Write is initiated in the same way as a Byte Write, but the microcontroller does not send a Stop Condition after
the first data word is clocked in. Instead, after the EEPROM acknowledges receipt of the first data word, the
microcontroller can transmit up to fifteen more data words. The EEPROM will respond with a zero after each data word
received. The microcontroller must terminate the Page Write sequence with a Stop Condition (see Figure 8-2).
The data word address lower four bits are internally incremented following the receipt of each data word. The higher data
word address bits are not incremented, retaining the memory page row location. When the word address, internally
generated, reaches the page boundary, the following byte is placed at the beginning of the same page. If more than eight
data words are transmitted to the EEPROM, the data word address will roll-over and previous data will be overwritten.
Figure 8-2. Page Write
S
W
T
R
A
I
R
Device
T
T Address E
Word
Address (n)
SDA Line
M
RA
A
S
/C
C
B
WK
K
Data (n)
Data (n + 1)
A
A
C
C
K
K
S
T
O
Data (n + x) P
A
C
K
Acknowledge Polling: Once the internally timed write cycle has started and the EEPROM inputs are disabled,
Acknowledge Polling can be initiated. This involves sending a Start Condition followed by the device address word. The
Read/Write bit is representative of the operation desired. Only if the internal write cycle has completed will the EEPROM
respond with a zero allowing the Read or Write sequence to continue.
9. Read Operations
Read operations are initiated in the same way as Write operations with the exception that the Read/Write select bit in the
device address word is set to one. There are three read operations:
 Current Address Read
 Random Address Read
 Sequential Read.
Current Address Read: The internal data word address counter maintains the last address accessed during the last
Read or Write operation, incremented by one. This address stays valid between operations as long as the chip power is
maintained. The address roll-over during Read is from the last byte of the last memory page to the first byte of the first
page. The address roll-over during Write is from the last byte of the current page to the first byte of the same page.
Once the device address with the Read/Write select bit set to one is clocked in and acknowledged by the EEPROM, the
current address data word is serially clocked out. The microcontroller does not respond with an input zero but does
generate a following Stop Condition (see Figure 9-1).
Figure 9-1. Current Address Read
S
T
R
S
A
E
T
R ^Device
A
O
T Address
D
Data
P
SDA Line
M
RA
N
S
/C
O
B
WK
A
C
K
Atmel AT24C16C [DATASHEET] 10
Atmel-8719B-SEEPROM-AT24C16C-Datasheet_042013