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BR24T64FVT-WGE2 Datasheet(PDF) 8 Page - Rohm |
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BR24T64FVT-WGE2 Datasheet(HTML) 8 Page - Rohm |
8 / 24 page Technical Note 8/21 BR24T□□□□Series www.rohm.com 2011.03 - Rev.A © 2011 ROHM Co., Ltd. All rights reserved. ●Write Command ○Write cycle ・Arbitrary data is written to EEPROM. When to write only 1 byte, byte write is normally used, and when to write continuous data of 2 bytes or more, simultaneous write is possible by page write cycle. The maximum number of write bytes is specified per device of each capacity. Up to 256 arbitrary bytes can be written.(In the case of BR24T1M-W) W R I T E S T A R T R / W A C K S T O P WO R D ADD R ESS(n ) DAT A (n) SDA LIN E A C K A C K D A T A (n+ 15) A C K SL AVE ADDR E SS 1 0 0 1A 0 A1 A2 WA 7 D0 D7 D 0 注 ) WA 0 A1 A2 WA 7 D7 1 1 0 0 W R I T E S T A R T R / W S T O P WORD ADDRESS DATA SLAVE ADDRESS A0 WA 0 D0 A C K SDA LINE A C K A C K Note) Fig.38 Byte write cycle (BR24T01/02/04/08/16-W) A1 A2 WA 14 1 1 0 0 W R I T E S T A R T R / W S T O P 1st WORD ADDRESS DATA SLAVE ADDRESS A0 D0 A C K SDA LINE A C K A C K Note) WA 13 WA 12 WA 11 WA 0 A C K 2nd WORD ADDRESS D7 *1 WA 15 *1 As for WA12, BR24T32-W becomes Don't care. As for WA13, BR24T32/64-W becomes Don't care. As for WA14, BR24T32/64/128-W becomes Don't care. As for WA15, BR24T32/64/128/256-W becomes Don't care. Fig.39 Byte write cycle (BR24T32/64/128/256/512/1M-W) Fig.40 Page write cycle (BR24T01/02/04/08/16-W) Fig.41 Page write cycle (BR24T32/64/128/256/512/1M-W) *1 As for WA12, BR24T32-W becomes Don't care. As for WA13, BR24T32/64-W becomes Don't care. As for WA14, BR24T32/64/128-W becomes Don't care. As for WA15, BR24T32/64/128/256-W becomes Don't care. *2 As for BR24T128/256-W becomes (n+63) As for BR24T512-W becomes (n+127) As for BR24T1M-W becomes (n+255) W R I T E S T A R T R / W A C K S T O P 1st WORD ADDRESS(n) SDA LINE A C K A C K DATA(n+31) A C K SLAVE ADDRESS 1 0 0 0 1 0 A0 A1 A2 WA 14 D0 注 ) *1 DATA(n) D0 D7 A C K 2nd WORD ADDRESS(n) WA 0 WA 13 WA 12 WA 11 *2 Note) Fig.42 Difference of slave address of each type As for WA7, BR24T01-W becomes Don't care. *1 As for WA7, BR24T01-W becomes Don't care. *2 As for BR24T01/02-W becomes (n+7) *2 *1 WA 15 *1 In BR24T16-W, A2 becomes P2. *2 In BR24T08/16-W, A1 becomes P1. *3 In BR24T04/08/16/1M-W A0 becomes P0. 1 0 0 1A 0 A1 A2 *1 *2 *3 |
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