BU2614 データシートの表示（PDF） - ROHM Semiconductor

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BU2614

PLL frequency synthesizer for tuners

ROHM Semiconductor 

Audio ICs

FHow the frequency counter and unlock detection circuit operate

(1) When CT = 1: Frequency count and unlock detec-

tion are carried out.

BU2614 / BU2614FS

(2) When CT = 0 and GT = 1: Only unlock detection is

carried out.

Explanation of CD terminal

When frequency measurement or unlock detection is fin-

ished, the CD terminal goes to LO to indicate that the

count and unlock detection have finished.

It also synchronizes with CK to output counter data.

When the next data is input, it goes to HI.

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