BU9890GUL-W ROHM Co. Ltd., BU9890GUL-W Datasheet - Page 8

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

◇WP TIMING
○For the WRITE operation, WP must be "LOW" during the period of time from the rising edge of
○In the case of setting WP "HIGH" during
SCL
SDA
WP
the clock which takes in D0 of first byte until the end of
data of accessing address is not guaranteed. Please write correct data again in the case.
SCL
SDA
WP
During this period, WRITE operation is canceled by setting WP "HIGH".（ See Fig.-6(b) ）
D1
DATA(1)
D1
t
SU
DATA(1)
：WP
D0
D0
Fig.-6(b) WP TIMING OF THE WRITE CANCEL OPERATION
ACK
Fig.-6(a) WP TIMING OF THE WRITE OPERATION
ACK
t
HIGH
DATA(n)
DATA(n)
t
:
REV. A
WP
WR,
WRITE operation is stopped in the middle and the
t
ACK
WR.
ACK
( See Fig.-6(a) )
STOP BIT
ｔ
ＷＲ
ｔ
ＨＤ
：
WP
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