LC72146V 查看數據表（PDF） - SANYO -> Panasonic

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产品描述 (功能)

生产厂家

LC72146V

PLL Frequency Synthesizer for Electronic Tuning

SANYO -> Panasonic 

Continued from preceding page.

Number

Symbol

13

LCTR/I-7

LC72146, 72146M, 72146V

Type

Function

General-purpose

counter

• LCTR is selected when CTS1 is set to 0.

• If the CTS0 bit in the serial data is set to 1:

• The circuit operates in frequency measurement mode.

• nput frequency range: 10 to 500 kHz

• The signal is directly transmitted to the general-purpose

counter without passing through the divide-by-two circuit.

• If the CTS0 bit in the serial data is set to 0:

• The circuit operates in period measurement mode.

• nput frequency range: 1 Hz to 20 kHz

• The measurement period can be set to be either one or

two periods of the input signal, and if two period

measurement is selected, the input frequency range

becomes 2 Hz to 40 kHz.

• The result is output from the DO output pin starting with

the MSB of the general-purpose counter.

• See the item on the structure of the general-purpose

counter for details.

• When the L/I-7 bit in the serial data is set to 0:

• This pin functions as an input port. The value input is

output from the DO pin.

Equivalent circuit

S

No. 4922-8/22

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