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BU6521KV-E2 Datasheet(PDF) 11 Page - Rohm |
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BU6521KV-E2 Datasheet(HTML) 11 Page - Rohm |
11 / 19 page Technical Note 11/18 BU6520KV,BU6521KV www.rohm.com 2010.02 - Rev.C © 2010 ROHM Co., Ltd. All rights reserved. 4. SPI-bus Interface Timing tSPDV tSPS tSPH tSPCS tSPCH SCK SCEB SDO SDI Fig.8 SPI-bus Interface Timing Symbol Description MIN TYP MAX Unit tSPCLK Clock Cycle 2 736*1 8192 tCAMCKI dSPCLK Clock Duty 45 50 55 % tSPCS SCK Rise SCEB Setup Time 4 738~ 1105 *1 12289 tCAMCKI tSPCH SCEB Rise after SCK Rise Time 2 751 *1 8319 tCAMCKI tSPDV Decision of SDO from SCK Fall - - 28 ns tSPS SCK Rise SDI Setup Time - - 28 ns tSPH SCK Rise SDI Hold Time - - 28 ns *1 Default status right after reset When the automatic reading function with the AUTO pin is used, it becomes timing of SCEB to SCK as above. It is possible to access from the register of BU6520KV/BU6521KV to EEPROM.In that case, SCEB is controlled by the register. After the value is set to the register, the SCEB pin is changed into the logic set at once. |
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