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UPD9930 Datasheet(PDF) 16 Page - NEC |
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UPD9930 Datasheet(HTML) 16 Page - NEC |
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16 / 78 page  µPD9930 16 FSYNC COUNT 238 239 1 0 2 3 240 241 0 0 ANAPWD CLKPWD DSPPWD Power down command Power up command (4) Power up/down command (PUPCMD/PDWCMD) The stand-by mode is set and cleared by the following two special commands. When resetting, the stand-by mode is set. Figure 2-7 Power Down Command (Sets to stand-by mode) D7 D6 D5 D4 D3 D2 D1 D0 PDWCMD 011100 X X Remark X: Don't Care Figure 2-8 Power Up Command (Clears stand-by mode) D7 D6 D5 D4 D3 D2 D1 D0 PUPCMD 011110 X X Remark X: Don't Care Power up/down timing Remarks COUNT: Internal counter (counts with an 8-kHz internal clock) ANAPWD: Analog power down (power down when high) CLKPWD: Clock power down (power down when high) DSPPWD: Signal processing power down (power down when high) |
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