BU9890GUL-W ROHM Co. Ltd., BU9890GUL-W Datasheet - Page 11

• Manufacturer Part Number: BU9890GUL-W
• Description: 4k?8 Bit Electrically Erasable Prom
• Manufacturer: ROHM Co. Ltd.

SDA
LINE
WP
SDA
LINE
WP
◇BYTE WRITE
○By using this command, the data is programed into the indicated word address.
○When the master generates a STOP condition, the device begins the internal
○This device is capable of thirty-two byte Page Write operation.
○When two or more byte data are inputted, the five low order address(WA4～WA0) bits are in
A
R
A
R
S
T
T
S
T
T
the address(WA4～WA0) remain constant.
1 0
ternally incremented by one after the receipt of each word. The seven higher order bits of
write cycle to the nonvolatile memory array.
1 0
ADDRESS
SLAVE
ADDRESS
1
SLAVE
1
0
0
0
0
0
0
0
W
R
/
W
R
T
E
I
0
A
C
K
W
W
* * *
R
T
E
R
/
I
ADDRESS（ｎ）
A
C
K
1st WORD
* * *
*
WA
11
1st WORD
ADDRESS
Fig.-9 PAGE WRITE CYCLE TIMING
Fig.-8 BYTE WRITE CYCLE TIMING
*
WA
11
A
C
K
ADDRESS（ｎ）
2nd WORD
A
C
K
REV. A
WA
0
2nd WORD
ADDRESS
A
C
K
D7
DATA(n)
WA
0
C
A
K
D0
D7
A
C
K
DATA(n+31)
DATA
* : Don’t care
* : Don’t care
D0
D0
A
C
K
A
C
K
O
S
T
P
S
T
O
P
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