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BU9833GUL-W (2Kbit)
○ Notes on write cycle continuous input
At STOP (stop bit),
Writ e starts .
Datasheet
S
T
A
R
T
SLAVE
ADDRESS
W
R
I
T
E
WORD
ADDRESS(n)
DATA(n)
DATA(n+15)
S
T
O
P
S
T
A
R
T
SDA
LINE
1 0 1 0 A2 0 0
WA
7
WA
0
D7
D0
D0
1 0 1 0
R A
/ C
W K
A
C
K
A
C
K
A
C
K
Next command
Figure 34. Page write cycle
Note)
1 0 1 0 A2 0 0
Figure 35. Difference of each type of slave address
t WR (maximum : 5ms)
Command is not accepted for this period.
○ Notes on page write cycle
List of numbers of page write
Number of Pages
16Byte
○ Internal address increment
Page write mode
Product number
BU9833GUL-W
WA7 -----
0 -----
WA4
0
WA3
0
WA2
0
WA1
0
WA0
0
The above numbers are maximum bytes
0 -----
0
0
0
0
0
for respective types.
Any types below these can be written.
0 -----
0
0
0
0
0
Increment
1page = 16 bytes, but the page write cycle write time is 5ms
at maximum for 16byte bulk write.
It does not stand 5ms at maximum x 16 bytes = 80ms (Max.).
0Eh
0
0
0
-----
-----
-----
0
0
0
1
1
0
1
1
0
1
1
0
0
1
0
Significant bit is fixed.
No digit up
For example, when it is started from address 0Eh, therefore, increment is made
as below,
0Eh → 0Fh → 00h → 01h ---, which please note.
*0Eh --- 0E in hexadecimal, therefore, 00001110 becomes a binary number.
○ Write protect terminal (WP)
? Write protect function
When WP terminal is set Vcc (H level), data rewrite of all addresses is prohibited. When it is set GND (L level), data
rewrite of all addresses is enabled. Be sure to connect this terminal to Vcc or GND, or control it to H level or L level.
Do not use it open.
At extremely low voltage at power ON/OFF, by setting the WP terminal “H”, mistake write can be prevented.
During tWR, set the WP terminal always to “L”. If it is set “H”, write is forcibly terminated.
www.rohm.com
? 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111 ? 15 ? 001
14/24
TSZ02201-0R2R0G100450-1-2
04.SEP.2012 Rev.001
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