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BH1715FVC Datasheet(PDF) 10 Page - Rohm |
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BH1715FVC Datasheet(HTML) 10 Page - Rohm |
10 / 17 page BH1715FVC Technical Note 10/16 www.rohm.com 2010.06 - Rev.B © 2010 ROHM Co., Ltd. All rights reserved. ● I 2C Bus Access 1) I 2C Bus Interface Timing chart Write measurement command and Read measurement result are done by I 2C Bus interface. Please refer the formally specification of I 2C Bus interface, and follow the formally timing chart. 2) Slave Address Slave Address is 2 types, it is determined by ADDR Terminal ADDR = ‘H’ (ADDR ≧ 0.7VCC) →“1011100“ ADDR = 'L' (ADDR ≦ 0.3VCC) →“0100011“ 3)Write Format BH1715FVC is not able to accept plural command without stop condition. Please insert SP every 1 Opecode. ST Slave Address R/W 0 Ack Opecode Ack SP 4)Read Format ST Slave Address R/W 1 Ack High Byte [15:8] 2 15 214 213 212 211 210 29 28 Ack Low Byte [7:0] 2 7 2 6 2 5 2 4 2 3 2 2 2 1 2 0 Ack SP ex) High Byte = "1000_0011" Low Byte = "1001_0000" (2 15 + 29 + 28 + 27 + 24) / 1.2 ≒ 28067 [ lx ] * Please refer formality I 2C bus specification of NXP semiconductors. from Master to Slave from Slave to Master tHD ; DAT S SDA SCL tHD ; STA tLOW tf tr Sr tSU ; STA tSU ; DAT tf tSU;STO tBUF P tr S tHIGH tHD ; STA |
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