BU99901GUZ-W ROHM Co. Ltd., BU99901GUZ-W Datasheet - Page 11

• Manufacturer Part Number: BU99901GUZ-W
• Description: 4k?8 Bit Electrically Erasable Prom
• Manufacturer: ROHM Co. Ltd.

○Random Read operation allows the master to access any memory location indicated word
○If an Acknowledge is detected, and no STOP condition is generated by the master (μ-COM),
NOTE) If an Acknowledge is detected with "Low" level, not "High" level, command will become
○○If an Acknowledge is detected, and no STOP condition is generated by the master (μ-CO
○The Sequential Read operation can be performed with both Current Read and Random Read.
NOTE) If an Acknowledge is detected with "Low" level, not "High" level, command will become
○If an Acknowledge is not detected, the device will terminate further data transmissions
○If an Acknowledge is not detected, the device will terminate further data transmissions
SDA
LINE
SDA
LINE
address.
the device will continue to transmit the data. ［It can transmit all data (32kbit 4096word)］
and await a STOP condition before returning to the standby mode.
M), the device will continue to transmit the data. ［It can transmit all data (32kbit 4096word)］
and await a STOP condition before returning to the standby mode.
Sequential Read. So the device transmits the next data, Read is not terminated. In the
case of terminating Read, input Acknowledge with "High" always, then input stop condition.
Sequential Read. So the device transmits the next data, Read is not terminated. In the
case of terminating Read, input Acknowledge with "High" always, then input stop condition.
S
T
A
R
T
S
T
A
R
T
1 0
1 0
ADDRESS
SLAVE
1
ADDRESS
SLAVE
1
0
0
0
0
0
0
0
W
R
/
W
R
T
E
I
Fig.-12 SEQUENTIAL READ CYCLE TIMING
Fig.-11 RANDOM READ CYCLE TIMING
0
A
C
K
W
R
A
D
R
* * *
E
/
ADDRESS（ｎ）
C
A
K
1st WORD
Fig.-10 CURRENT READ CYCLE TIMING
D7
（ Current Read ）
*
WA
11
DATA(n)
C
A
K
ADDRESS（ｎ）
REV. A
2nd WORD
D0
A
C
K
WA
0
A
C
K
A
R
S
T
T
1 0
ADDRESS
SLAVE
1
0
A2
A
C
A1
K
A0
D7
W
R
/
R
E
A
D
C
A
K
DATA(n+x)
D7
DATA(n)
* : Don ’ t care
D0
D0
C
A
K
A
C
K
O
S
T
P
O
S
T
P
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