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HT1622 Datasheet(PDF) 15 Page - Holtek Semiconductor Inc |
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HT1622 Datasheet(HTML) 15 Page - Holtek Semiconductor Inc |
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15 / 17 page  Command Summary Name ID Command Code D/C Function Def. READ 110 A5A4A3A2A1A0D0D1D2D3 D Read data from the RAM WRITE 101 A5A4A3A2A1A0D0D1D2D3 D Write data to the RAM READ- MODIFY- WRITE 101 A5A4A3A2A1A0D0D1D2D3 D Read and Write data to the RAM SYS DIS 100 0000-0000-X C Turn off both system oscillator and LCD bias generator Yes SYS EN 100 0000-0001-X C Turn on system oscillator LCD OFF 100 0000-0010-X C Turn off LCD display Yes LCD ON 100 0000-0011-X C Turn on LCD display TIMER DIS 100 0000-0100-X C Disable time base output Yes WDT DIS 100 0000-0101-X C Disable WDT time-out flag output Yes TIMER EN 100 0000-0110-X C Enable time base output WDT EN 100 0000-0111-X C Enable WDT time-out flag output TONE OFF 100 0000-1000-X C Turn off tone outputs Yes CLR TIMER 100 0000-1101-X C Clear the contents of the time base generator CLR WDT 100 0000-1111-X C Clear the contents of WDT stage RC 32K 100 0001-10XX-X C System clock source, on-chip RC oscillator Yes EXT 32K 100 0001-11XX-X C System clock source, external clock source TONE 4K 100 010X-XXXX-X C Tone frequency output: 4kHz TONE 2K 100 0110-XXXX-X C Tone frequency output: 2kHz IRQ DIS 100 100X-0XXX-X C Disable IRQ output Yes IRQ EN 100 100X-1XXX-X C Enable IRQ output F1 100 101X-0000-X C Time base clock output: 1Hz The WDT time-out flag after: 4s F2 100 101X-0001-X C Time base clock output: 2Hz The WDT time-out flag after: 2s F4 100 101X-0010-X C Time base clock output: 4Hz The WDT time-out flag after: 1s F8 100 101X-0011-X C Time base clock output: 8Hz The WDT time-out flag after: 1/2 s HT1622 15 April 21, 2000 |
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