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BM81810MUF-M Datasheet(PDF) 35 Page - Rohm |
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BM81810MUF-M Datasheet(HTML) 35 Page - Rohm |
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35 / 78 page  BM81810MUF-M . 35/75 TSZ02201-0A3A0AS00510-1-2 © 2020 ROHM Co., Ltd. All rights reserved. 15.May.2020 Rev.001 TSZ22111 • 15 • 001 www.rohm.com Serial communication This IC has two device-address-differential EEPROM installed and data is send or received to/from EEPROM using 2-line serial interface (SCL, SDA). Communication format for data sending or receiving to/from each EEPROM is shown below. EEPROM I2C Format for DVR (VCOM calibrator) When Device Address = 1001111(R/W) is selected, Data is Read or Write EEPROM for DVR(VCOM calibrator). During Write mode •When P=1, the sending data is written only to Register. •When WPN=Low and P=0, the sending data is written only to Register. •When WPN=High and P=0, the sending data is written both to Register and EEPROM. During Read mode The last bit of received data is “Don’t care”. “D6” is ± select bit: 0 = “+”, 1=”-” from VCOM(HOT) value. [D5:D0] are voltage band from VCOM(HOT). The voltage band is calculated; 10mV x [D5:D0], For example, [D6:D0,P] = 82h(D6=1, [D5:D0]=1 ’d, P=0) ••• VCOM = VCOM(HOT) – 1 x 10mV; [D6:D0,P] = 7Eh(D6=0, [D5:D0]=63 ’d, P=0) ••• VCOM = VCOM(HOT) + 63 x 10mV; Sequence of DVR side EEPROM during Read/Write mode is shown in below chart. R/W ACK ACK 1 0 0 1 1 1 1 0 0 D6 D5 D4 D3 D2 D1 D0 P 0 R/W ACK ACK 1 0 0 1 1 1 1 1 0 D6 D5 D4 D3 D2 D1 D0 X 1 DATA STOP DATA STOP Device address Device address Write operation Read operation Start Start Figure 70 Figure 71 |
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