BRCB008GWZ-3_13 Datasheet, PDF (12/29 Pages) Rohm – WLCSP EEPROM

BRCB008GWZ-3
Datasheet
Write Command
1. Write Cycle
(1) Arbitrary data can be written to this EEPROM. When writing only 1 byte, Byte Write is normally used, and when
writing continuous data of 2 bytes or more, simultaneous write is possible by Page Write Cycle. Up to 16 arbitrary
bytes can be written.
SDA
LINE
S
W
T
R
A
I
R
SLAVE T
T
ADDRESS E
1 0 1 0 *1 P1 P0
WA
7
RA
/C
WK
WORD
ADDRESS
WA
0
D7
A
C
K
S
T
DATA
O
P
D0
A
C
K
*1 Don't care.
Figure 27. Byte Write Cycle
SDA
LINE
S
W
T
R
A
I
R
SLAVE
T
T
ADDRESS
E
WORD
ADDRESS(n)
DATA(n)
1 0 1 0 ^*1 P1 P0
WA
7
RA
/C
WK
WA
0
D7
A
C
K
D0
A
C
K
S
T
O
DATA(n+15)
P
D0
A
C
K
*1 Don't care.
Figure 28. Page Write Cycle
(2) During internal write execution, all input commands are ignored, therefore ACK is not returned.
(3) Data is written to the address designated by word address (n-th address)
(4) By issuing stop bit after 8bit data input, internal write to memory cell starts.
(5) When internal write is started, command is not accepted for tWR (5ms at maximum).
(6) Using page write cycle, writing in bulk is done as follows: When data of more than 16 bytes is sent, the byte in
excess overwrites the data already sent first.
(Refer to "Internal address increment".)
(7) As for Page Write Command, where 2 or more bytes of data is intended to be written, after page select bit ‘P0,P1’
of slave address are designated arbitrarily, only the value of 4 least significant bits in the address is incremented
internally, so that data up to 32 addresses of memory only can be written.
2. Notes on Page Write Cycle
1 page=16bytes, but the page
Write Cycle Time is 5ms at maximum for 16byte bulk write.
It does not stand 5ms at maximum × 16byte=80ms(Max)
3. Internal Address Increment
Page Write Mode
WA7
WA4 WA3 WA2 WA1 WA0
0
00000
0
00001
Increment
0
00010
0Eh ⁰
0
0
01110
01111
00000
Significant bit is fixed.
No digit up
For example, when it is started from address 0Eh,
then, increment is made as below,
0Eh→0Fh→00h→01h･･･ please take note.
※0Eh･･･0E in hexadecimal, therefore,
00001110 becomes a binary number.
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