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BU91797MUF-ME2 Datasheet(PDF) 10 Page - Rohm |
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BU91797MUF-ME2 Datasheet(HTML) 10 Page - Rohm |
10 / 27 page 10/23 BU91797MUF-M MAX 144 segments (SEG36×COM4) Datasheet TSZ02201-0P4P0D301040-1-2 21.Dec.2015 Rev.001 www.rohm.com © 2015 ROHM Co., Ltd. All rights reserved. TSZ22111・15・001 Detailed Command Description D7 (MSB) is a command or data judgment bit. Refer to Command and data transfer method. C: 0: Next byte is RAM write data. 1: Next byte is command. Set IC Operation (ICSET) MSB D7 D6 D5 D4 D3 D2 D1 LSB D0 C 1 1 0 1 P2 P1 P0 P2: MSB data of DDRAM address. Refer to “ADSET” command. Set software reset execution. Setup P1 No operation 0 Software Reset Execute 1 When “Software Reset” is executed, BU91797MUF-M is reset to initial condition. (Refer to Reset initialize condition) Don’t set Software Reset (P1) with P2, P0 at the same time. Set oscillator mode Setup P0 Reset initialize condition Internal clock 0 ○ External clock 1 Internal clock mode: OSCIN must be connected to VSS level. External clock mode: Input external clock from OSCIN terminal.. <Frame frequency Calculation at external clock mode> DISCTL 80Hz setting: Frame frequency [Hz] = external clock [Hz] / 512 DISCTL 71Hz setting: Frame frequency [Hz] = external clock [Hz] / 576 DISCTL 64Hz setting: Frame frequency [Hz] = external clock [Hz] / 648 DISCTL 53Hz setting: Frame frequency [Hz] = external clock [Hz] / 768 Figure 13. OSC MODE Switch Timing Command ICSET OSCIN_EN ( ( Internal signal ) Internal clock mode External clock mode Internal oscillation ( Internal signal ) External clock ( OSCIN ) |
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