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LC72147V Datasheet(PDF) 6 Page - Sanyo Semicon Device |
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LC72147V Datasheet(HTML) 6 Page - Sanyo Semicon Device |
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6 / 22 page  No. 6675-6/22 LC72147V Continued from preceding page. Pin No. Symbol Usage Function Pin circuit • General-purpose I/O ports. • The outputs are complementary output circuits. • After the power-on reset, these ports function as input ports. • The input/output state of these ports can be set using the I/O-4 and I/O-5 bits in the serial data sent from the controller. 11 13 I/O-4 I/O-5 General-purpose I/O ports • A/D converter input The A/D converter is a 6-bit successive-approximation circuit. See the item on the structure of the A/D converter for details. 18 19 ADC0 ADC1 A/D converter input • PLL charge pump output When the frequency created by dividing the local oscillator signal frequency by N is higher than the reference frequency, a high level is output from the PD pin. When lower, a low level is output. The PD pin goes to the high-impedance state when the frequencies match. 7 PD Charge pump output • HCTR is selected by setting CTS in the control data to 1. Input frequency: 0.4 to 25 MHz The signal is input to a divide-by-2 circuit and the result is input to a general-purpose counter. This counter can also be used as an integrating counter. The counter value is output as the result of the count, MSB first, from the DO pin. See the item describing the structure of the general-purpose counter for details. 15 HCTR General-purpose counter • Output buffer for the crystal oscillator circuit • When XB in the serial data is set to 1, the output buffer operates and the crystal oscillator signal (a pulse signal) is output. When XB is 0, XBUF outputs a low level. (After the power-on reset, XB is set to 0 and the output buffer is fixed at the low level.) 3 XBUF Crystal oscillator buffer XOUT |
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