s-24c04bphal Seiko Instruments Inc., s-24c04bphal Datasheet - Page 15

• Manufacturer Part Number: s-24c04bphal
• Description: 2-wire Cmos Serial E2prom
• Manufacturer: Seiko Instruments Inc.

7. Read
7.1 Current address read
Rev.3.0
For recognition of the address pointer inside the E
The memory address counter inside the E
SCL clock at which the 8th bit of data is output during reading. During writing, the higher bits of the memory
address (higher 4 bits of the word address) are left unchanged and are not incremented at any falling of the
SCL clock when the 8th bit of the write data is received.
The E
address is retained as long as the power voltage is the retention voltage V
the master device recognizes the position of the address pointer inside the E
the memory address of the current address pointer without specifying a word address. This is called
“Current Address Read”.
the start condition signal, it outputs the acknowledge signal.
bit of data is output. The master device does not output the acknowledge signal and transmits the stop
condition signal to finish reading.
“Current Address Read” is explained for when the address counter inside the E
When the E
Next, 8-bit data at address “n” is output from the E
The address counter is incremented to address n + 1 at the falling edge of the SCL clock at which the 8th
_00
2
PROM holds the last accessed memory address during both writing and reading. The memory
2
PROM receives a 7-bit device address and the 1-bit read/write instruction code “1”, following
SDA line
S
A
R
T
T
M
1 0 1 0
S
B
Figure 13 Current Address Read
ADDRESS
Seiko Instruments Inc.
2
DEVICE
PROM is automatically incremented for every falling edge of the
X X P0
2
PROM, take into consideration the following:
2
PROM, in synchronization with the SCL clock.
S
B
L
W
R
1
R
D
/
E
A
C
A
K
D7 D6 D5 D4 D3 D2 D1 D0
master device
No ACK from
2-WIRE CMOS SERIAL E
DATA
AH
2
ADR INC
PROM, data can be read from
or more. Accordingly, when
2
PROM is address “n”.
S
T
O
P
S-24C04BPHAL
2
PROM
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