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HD404374FT Datasheet(PDF) 108 Page - Renesas Technology Corp |
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HD404374FT Datasheet(HTML) 108 Page - Renesas Technology Corp |
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108 / 161 page  HD404374/HD404384/HD404389/HD404082/HD404084 Series Rev.5.00, Sep.11.2003, page 108 of 161 Usage notes: • Use the SEM or SEMD instruction to write to the A/D start flag (ADSF). • Do not write to the ADSF during A/D conversion. • Data in the A/D data register is undetermined during A/D conversion. • As the A/D converter operates on a clock from OSC, it stops in stop mode, watch mode, and subactive mode. The current flowing in the A/D converter ladder resistor is also cut in these low-power modes to reduce power consumption. • When an analog input pin is selected by the A/D mode register, the pull-up MOS for that pin is disabled. • Use of bit 0 of A/D data register-lower (ADRL) is prohibited, but with the emulator it should be written with 1. This bit need not be written in the mask ROM and ZTAT TM versions, although writing 1 will have no effect. |
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