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BD81026MUV-E2 Datasheet(PDF) 7 Page - Rohm |
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BD81026MUV-E2 Datasheet(HTML) 7 Page - Rohm |
7 / 22 page 7/18 TSZ02201-0313AAF00660-1-2 © 2016 ROHM Co., Ltd. All rights reserved. 19.Feb.2016 Rev.001 www.rohm.com TSZ22111・15・001 BD81026MUV Operation of each block (1) 10 Bit DAC block ■Serial data control block The serial interface uses a 2-line serial data format (SCL, SDA). The serial data control block consists of a register that stores data from the SDA and SCL pins, and a DAC circuit that receives the output from this register and provides adjusted voltages to other IC blocks. Figure 3. Serial block ・Register ( Ch0 to Ch11 ) A serial signal (consisting of 10-bit gamma correction voltage values) input using the serial interface or I2C bus interface is held for each register address. Data is initialized by the reset signal generated during a power-on reset. Register is selectable by BKSEL pin. (For detail, refer to P.9.) Also, it is selectable that either revises the DAC output setting voltage by LD pin to the data, read to register. (For detail, refer to P.10. ) ・Data writing mode selector Switching MODE pin High/Low enables changing data switching mode. During MODE=Low, a data is rewrote by Double Register switching function of BKSEL control. During MODE=High, a data is rewrote by DAC output latch function of LD control. MODE pin is pulled down inside so that at open state, it is Low. If it is set to High, connect to VDD. ・DAC The DAC LOGIC converts the 10-bit digital signal read to the register to a voltage. ・AMP ( Ch0 to Ch11 ) The Amp amplifies the voltage output from the DAC LOGIC. While Under Voltage Lock-Out (UVLO) circuit or Thermal Shut Down (TSD) circuit is operating, output goes into Hi-z. In case connecting high capacity capacitor with low ESR, damping is needed with a resistor to keep phase margin. OUT0 OUT1 OUT2 OUT3 OUT4 OUT5 OUT6 OUT7 OUT8 OUT9 OUT10 OUT11 Acknowledge SDA SCL Shift Register DAC DAC DAC DAC DAC DAC DAC DAC DAC DAC DAC DAC BKSEL LD MUX MUX MUX MUX MUX MUX MUX MUX MUX MUX MUX MUX Register11 BANK B Register11 BANK A Register10 BANK B Register10 BANK A Register9 BANK B Register9 BANK A Register8 BANK B Register8 BANK A Register7 BANK B Register7 BANK A Register6 BANK B Register6 BANK A Register5 BANK B Register5 BANK A Register4 BANK B Register4 BANK A Register3 BANK B Register3 BANK A Register2 BANK B Register2 BANK A Register1 BANK B Register1 BANK A Register0 BANK B Register0 BANK A CTL MODE |
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