CXA3250N Ver la hoja de datos (PDF) - Sony Semiconductor

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componentes Descripción

Fabricante

CXA3250N

All Band TV Tuner IC with On-chip PLL

Sony Semiconductor 

CXA3250AN

2.) Programming

The VCO lock frequency is obtained according to the following formula.

fosc=fref × (32 M + S)

fosc : local oscillator frequency

fref : phase comparison frequency

M : main divider frequency division ratio

S : swallow counter frequency division ratio

The variable frequency division ranges of M and S are as follows, and are set as binary.

S < M ≤ 1023 (S < M ≤ 511 during 18-bit transfer)

0 ≤ S ≤ 31

3.) I2C Bus Control

This IC conforms to the standard I2C bus format, and bidirectional bus control is possible consisting of a

write mode in which various data are received and a read mode in which various data are sent. Write and

read modes are recognized according to the setting of the final bit (R/W bit) of the address byte. Write

mode is set when the R/W bit is “0” and read mode is set when the R/W bit is “1”.

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