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TDA7421 数据表(PDF) 22 Page - STMicroelectronics |
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TDA7421 数据表(HTML) 22 Page - STMicroelectronics |
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22 / 38 page  PLL COUNTER 2 (MSB) MSB LSB FUNCTION D7 D6 D5 D4 D3 D2 D1 D0 0000 000 0 MSB = 0 0000 000 1 MSB = 256 0000 001 0 MSB = 512 all combinations allowed • • • 1111 110 0 MSB = 64768 1111 110 1 MSB = 65024 1111 111 0 MSB = 65280 1111 111 1 MSB = 65536 PC15 PC14 PC13 PC12 PC11 PC10 PC9 PC8 Bit name Subddress = 02H Swallow mode: fvco/fsyn = LSB + MSB + 32 PLL REFERENCE COUNTER 1 (LSB) MSB LSB FUNCTION D7 D6 D5 D4 D3 D2 D1 D0 0000 000 0 LSB = 0 0000 000 1 LSB = 1 0000 001 0 LSB = 2 all combinations allowed • • • 1111 110 0 LSB = 252 1111 110 1 LSB = 253 1111 111 0 LSB = 254 1111 111 1 LSB = 255 RC7 RC6 RC5 RC4 RC3 RC2 RC1 RC0 Bit name Subaddress =03H PLL REFERENCE COUNTER 2 (MSB) MSB LSB FUNCTION D7 D6 D5 D4 D3 D2 D1 D0 0000 000 0 MSB = 0 0000 000 1 MSB = 256 0000 001 0 MSB = 512 all combinations allowed • • • 1111 110 0 MSB = 64768 1111 110 1 MSB = 65024 1111 111 0 MSB = 65280 1111 111 1 MSB = 65536 RC15 RC14 RC13 RC12 RC11 RC10 RC9 RC8 Bit name Subddress = 04H fOSC/fREF = LSB + MSB + 1 TDA7421 22/38 |
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