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LC72130 Scheda tecnica(PDF) 7 Page - Sanyo Semicon Device |
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LC72130 Scheda tecnica(HTML) 7 Page - Sanyo Semicon Device |
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7 / 22 page  Continued from preceding page. No. 4973-7/22 LC72130, 72130M Symbol Pin No. Type Functions Circuit configuration VSS BO1 BO2 BO3 BO4 BO5 IO1 IO2 PD1 PD2 AIN1 AOUT1 AIN2 AOUT2 IFIN 23 7 8 9 10 2 11 13 19 20 18 17 21 22 12 Ground Output port I/O port Charge pump output LPF amplifier transistor IF counter • The LC72130 ground — • Dedicated output pins • The output states are determined by BO1 to BO5 in the serial data. Data: 0 = open, 1 = low • These pins go to the open state after the power on reset. • An 8 Hz time base signal can be output from BO1 when TBC in the serial data is set to 1. • Note that the ON impedance of the BO1 pin is higher than that of the other pins (BO2 to BO5). • Pins used for both input and output • The input or output state is determined by bits IOC1 and IOC2 in the serial data. Data: 0 = input port, 1 = output port • When specified for use as an input port: The input state is transmitted to the controller through the DO pin. Input state: Low → data value = 0 High → data value = 1 • When specified for use as an output port: The output state is determined by bits IO1 and IO2 in the serial data. Data: 0 = open, 1 = low • These pins go to the input port state after the power ON reset. • PLL charge pump output When the frequency generated by dividing the local oscillator frequency by N is higher than the reference frequency, a high level will be output from the PD pin. Similarly, when that frequency is lower, a low level will be output. The PD pin goes to the high impedance state when the frequencies agree. • The MOS transistor used for the PLL active low-pass filter. • The input frequency range is from 0.4 to 12 MHz. • The signal is supplied directly to the IF counter. • The result from the IF counter MSB is output through the DO pin. • There are four measurement periods: 4, 8, 32, or 64 ms. |
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