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K24C64WER-A Datasheet(PDF) 7 Page - Estek Electronics Co. Ltd

Part # K24C64WER-A
Description  available in space-saving 8-lead PDIP, 8-lead SOP, and 8-lead TSSOP packages
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Manufacturer  ESTEK [Estek Electronics Co. Ltd]
Direct Link  http://www.estek.com.cn/en/index.asp
Logo ESTEK - Estek Electronics Co. Ltd

K24C64WER-A Datasheet(HTML) 7 Page - Estek Electronics Co. Ltd

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E P R O M
Read Operations
RANDOM READ: A random read requires a "dummy" byte write sequence to load in the data word address. Once the
device address word and data word address are clocked in and acknowledged by the EEPROM, the microcontroller
must generate another start condition. The microcontroller now initiates a current address read by sending a device
address with the read/write select bit high. The EEPROM acknowledges the device address and serially clocks out the
data word. The microcontroller does not respond with a "0" but does generate a following stop condition (see Figure 8
on page 8).
SEQUENTIAL READ: Sequential reads are initiated by either a current address read or a random address read. After
the microcontroller receives a data word, it responds with an acknowledge. As long as the EEPROM receives an
acknowledge, it will continue to increment the data word address and serially clock out sequential data words. When
the memory address limit is reached, the data word address will "roll over" and the sequential read will continue. The
sequential read operation is terminated when the microcontroller does not respond with a "0" but does generate a
following stop condition (see Figure 9 on page 8).
¡Figure 4: Device Address
¡Figure 5: Byte Write
¡Figure 6: Page Write
32K/64K
1
0
1
0
A2
A1
A0
R/W
MSB
LSB
SDA LINE
S
T
A
R
T
M
S
B
DEVICE
ADDRESS
L
S
B
R
/
W
A
C
K
M
S
B
L
S
B
A
C
K
FIRST WORD
ADDRESS
W
R
I
T
E
M
S
B
L
S
B
A
C
K
DATA
A
C
K
S
T
O
P
SECOND WORD
ADDRESS
SDA LINE
S
T
A
R
T
M
S
B
DEVICE
ADDRESS
L
S
B
R
/
W
A
C
K
A
C
K
DATA( n )
A
C
K
A
C
K
DATA( n+1 )
A
C
K
S
T
O
P
DATA( n+x )
W
R
I
T
E
M
S
B
L
S
B
A
C
K
FIRST WORD
ADDRESS
M
S
B
L
S
B
SECOND WORD
ADDRESS
7
24C32 / 24C64
BEIJING ESTEK ELECTRONICS CO.,LTD


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