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BR24T512FVJ-WGTR Datasheet(PDF) 10 Page - Rohm |
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BR24T512FVJ-WGTR Datasheet(HTML) 10 Page - Rohm |
10 / 24 page Technical Note 10/21 BR24T□□□□Series www.rohm.com 2011.03 - Rev.A © 2011 ROHM Co., Ltd. All rights reserved. ○Notes on page write cycle List of numbers of page write Number of Pages 8Byte 16Byte 32Byte 64Byte 128Byte 256Byte Product number BR24T01-W BR24T02-W BR24T04-W BR24T08-W BR24T16-W BR24T32-W BR24T64-W BR24T128-W BR24T256-W BR24T512-W BR24T1M-W The above numbers are maximum bytes for respective types. Any bytes below these can be written. In the case BR24T256-W, 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.) ○Internal address increment Page write mode (in the case of BR24T16-W) ○Write protect (WP) terminal ・Write protect (WP) 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 address 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. In the case of use it as an 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', mistake write can be prevented. 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. WA7 WA4 WA3 WA2 WA1 WA0 0 00000 0 00001 0 00010 0 01110 0 01111 0 00000 Increment 0Eh Significant bit is fixed. No digit up |
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