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SM5839AP Fiches technique(PDF) 7 Page - Nippon Precision Circuits Inc |
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SM5839AP Fiches technique(HTML) 7 Page - Nippon Precision Circuits Inc |
7 / 8 page SM5839A NIPPON PRECISION CIRCUITS—7 FUNCTIONAL DESCRIPTION Initialization After power is first applied, up to a maximum of 128 input data cycles are considered invalid. However, any cycle that momentarily sets the register length to 2 steps (by setting S1 to S6 all LOW) and then to the desired value is considered to be the first valid cycle. Resister Length Select The S0 to S6 inputs set the register length (L) to the decimal-value given by the following equation using positive logic (HIGH = 1 and LOW = 0). L = 64 ⋅ (S6) + 32 ⋅ (S5) + 16 ⋅ (S4) + 8 ⋅ (S3) + 4 ⋅ (S2) + 2 ⋅ (S1) + (S0) + 1 Clock and Output Control Length S6 S5 S4 S3 S2 S1 S0 128 1111111 127 1111110 126 1111101 125 1111100 ↓ ↓↓↓↓↓↓↓ 66 1000001 65 1000000 64 0111111 ↓ ↓↓↓↓↓↓↓ 3 0000010 2 000000 × Input Shift register Output ENRC CLK OE DOUT0 to DOUT7 ×× L – High impedance ×× H – Enabled HL → H × Circulating – LL → H × Non-circulating – |
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Description similaire - SM5839AP |
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