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BR25H080FJ-W Datasheet(PDF) 11 Page - Rohm |
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BR25H080FJ-W Datasheet(HTML) 11 Page - Rohm |
11 / 17 page 11/16 ● Method to cancel each command ○ READ ・ Method to cancel : cancel by CSB = “H” ○ RDSR ・ Method to cancel : cancel by CSB = “H” ○ WRITE、PAGE WRITE a:Ope code, address input area. Cancellation is available by CSB=”H” b:Data input area (D7~D1 input area) Cancellation is available by CSB=”H” c:Data input area (D0 area) When CSB is started, write starts. After CSB rise, cancellation cannot be made by any means. d:tE/W area. Cancellation is available by CSB = “H”. However, when write starts (CSB is started) in the area c, cancellation cannot be made by any means. And by inputting on SCK clock, cancellation cannot be made. In page write mode, there is write enable area at every 8 clocks. Note 1) If Vcc is made OFF during write execution, designated address data is not guaranteed, therefore write it once again. Note 2) If CSB is started at the same timing as that of the SCK rise, write execution / cancel becomes unstable, therefore, it is recommended to fall in SCK = “L” area. As for SCK rise, assure timing of tCSS / tCSH or higher. ○ WRSR a:From ope code to 15 rise. Cancel by CSB =”H”. b:From 15 clock rise to 16 clock rise (write enable area). When CSB is started, write starts. After CSB rise, cancellation cannot be made by any means. c:After 16 clock rise. Cancel by CSB=”H”. However, when write starts (CSB is started) in the area b, cancellation cannot be made by any means. And, by inputting on SCK clock, cancellation cannot be made. Note 1) If Vcc is made OFF during write execution, designated address data is not guaranteed, therefore write it once again Note 2) If CSB is started at the same timing as that of the SCK rise, write execution / cancel becomes unstable, therefore, it is recommended to fall in SCK = “L” area. As for SCK rise, assure timing of tCSS / tCSH or higher. ○ WREN/WRDI a:From ope code to 7-th clock rise, cancel by CSB = “H”. b:Cancellation is not available when CSB is started after 7-th clock. Ope code Address Cancel available in all areas of read mode Data 8 bit 8 bit/16bit 8 bit Fig.46 READ cancel valid timing Ope code Cancel available in all areas of read mode Data 8 bit 8 bit Fig.47 RDSR cancel valid timing Ope code Address a Data tE/W b d c 8bit 8bit/16bit 8bit D7 b D6 D5 D4 D3 D2 D1 D0 SCK SI c Ope code Data tE/W 8 bit 14 15 16 17 D1 D0 a b c 8 bit a b c Ope code 8 bit 7 8 9 a b a b SCK Fig.49 WRSR cancel valid timing Fig.50 WREN/WRDI cancel valid timing Fig.48 WRITE cancel valid timing |
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