TC9328AF datasheet(39/84 Pages) TOSHIBA

39 / 84 page

TC9328AF

2004-09-13

Division Method Setting

The pulse swallow method or direct method are selected with the HF and FM bit.

The power control bits (PW0/1) are controlled the gain of amplifier and prescaller (1/2 + 1/15•16).

Although the power bit in each mode has five methods, set up it as shown in the table.

By using 1 chip tuner IC that is built-in for 1/16 prescaller (TA2142FN), set up to the LF mode and set

the division value after 1/16 division frequency.

Mode

PW0

PW1

Division Method

Example of

Receiving Band

Operation

Frequency Range

Input Pin

Division

Number

(Note)

Direct division method

MW/LW

0.5~8 MHz

HF1

3~30 MHz

HF2

Pulse swallow method

(1/15•16)

1~10 MHz

AMin

30~130 MHz

VHF

Pulse swallow method

(1/2

+ 1/15•16)

(1 ch~12 ch)

50~230 MHz

FMin

2•n

Note: “n” represents the number of divisions programmed.

Note: It may not operate normally with abnormal current dissipation or unlocked PLL etc.

Frequency Division Number Setting

The frequency division number for the programmable counter is set in bits P0 to P16 in binary.

• Pulse swallow method (17 bits)

• Direct division method (13 bits)

P16 P15 P14 P13 P12 P11 P10

LSB

MSB

The range of frequency division number setting (n

= 210H~1FFFFH (528~131071))

P16 P15 P14 P13 P12 P11 P10

Don’t care

LSB

MSB

The range of frequency division number setting (n

= 10H~1FFFH (16~8191))

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