BR24Gxxx-3A (128K 256K 1M)
Datasheet
2. Notes on Write Cycle Continuous Input
List of numbers of page write
Number of
Pages
64Byte
256Byte
Product
number
BR24G128-3A
BR24G256-3A BR24G1M-3A
The above numbers are maximum bytes for respective types.
Any bytes below these can be written.
In the case BR24G256-3A, 1 page=64bytes, but the page
write cycle time is 5ms at maximum for 64byte bulk write.
It does not stand 5ms at maximum × 64byte=320ms(Max)
3. Internal Address Increment
Page write mode (in the case of BR24G128-3A)
WA7 WA6 WA5 WA4 WA3 WA2 WA1 WA0
00000000
00000001
00000010
Increment
3Eh 0
0
0
0111110
0111111
0000000
For example, when it is started from address 3Eh,
then, increment is made as below,
3Eh→3Fh→00h→01h・・・ please take note.
Significant bit is fixed.
No digit up
※3Eh・・・3E in hexadecimal, therefore, 00111110 becomes a
binary number.
4. Write Protect (WP) Terminal
Write protect (WP) function
When WP terminal is set at Vcc (H level), data rewrite of all addresses is prohibited. When it is set GND (L level), data
rewrite of all address is enabled. Be sure to connect this terminal to Vcc or GND, or control it to H level or L level. Do
not leave it open.
In case of using it as ROM, it is recommended to connect it to pull up or Vcc. At extremely low voltage at power
ON/OFF, by setting the WP terminal ‘H’, write error can be prevented.
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TSZ02201-0R2R0G100020-1-2
25.Feb.2013 Rev.002