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BD26502GUL Datasheet(PDF) 10 Page - Rohm |
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BD26502GUL Datasheet(HTML) 10 Page - Rohm |
10 / 40 page Technical Note 10/39 BD26502GUL www.rohm.com 2010.02 - Rev.A © 2010 ROHM Co., Ltd. All rights reserved. ● Serial Interface 1. SPI format ・ When IFMODE is set to “H”, it can interface with SPI format. ・ The serial interface is four terminals (serial clock terminal (SCL), serial data input terminal (SDA), and chip selection input terminal (CE)). (1)Write operation ・ Data is taken into an internal shift register with rising edge of CLK. (Max of the frequency is 13MHz.) ・ The receive data becomes enable in the “H” section of CE. (Active “H”.) ・ The transmit data is forwarded (with MSB-First) in the order of write command “0”(1bit), the control register address (7bit) and data (8bit). CE SCL SDA W A6 A5 A4 A3 A2 A1 A0 D4 D3 D2 D1 D0 D7 D6 D5 Fig.4 Writing format (2)Timing diagram twlc CE SCL SDA tcsw twhc tcss tscyc tss tsh tcgh Fig.5 Timing diagram (SPI format) (3) Electrical Characteristics (Unless otherwise specified, Ta=25°C, VBAT=3.6V, VINSW=3.6V, VIO=1.8V) Parameter Symbol Limit Unit Condition Min Typ Max SCL cycle time tscyc 76 - - ns H period of SCL cycle Twhc 35 - - ns L period of SCL cycle twlc 35 - - ns SDA setup time tss 38 - - ns SDA hold time tsh 38 - - ns Read and Write interval tcsw 38 - - ns CE setup time tcss 55 - - ns CE hold time tcgh 55 - - ns |
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