MAX3540 データシートの表示（PDF） - Maxim Integrated

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MAX3540

Complete Single-Conversion Television Tuner

Maxim Integrated 

Complete Single-Conversion Television Tuner

Table 3. N-DIV Low Register (Address: 0001b)

BIT NAME

BIT LOCATION (0 = LSB)

RECOMMENDED

DEFAULT

FUNCTION

N[7:0]

7–0

0101 0000

Sets the least significant bits of the PLL integer divider (N). Default

integer divider value is N = 4688. N can range from 256 to 32,767.

Table 4. R-DIV Register (Address: 0010b)

BIT NAME

BIT LOCATION (0 = LSB)

RECOMMENDED

DEFAULT

FUNCTION

RESERVED

7

0

Must be set to 0.

R[6:0]

6–0

100 0000

Sets the PLL reference divider (R). Default reference divider value

is R = 64. R can range from 16 to 127.

Table 5. VCO Register (Address: 0011b)

BIT NAME BIT LOCATION (0 = LSB) RECOMMENDED

DEFAULT

FUNCTION

VCO[4:3]

7, 6

VCO select. Selects one of three possible VCOs.

00 = VCOs shut down

01

01 = selects VCO1

10 = selects VCO2

11 = selects VCO3

VCO[2:0]

5, 4, 3

VCO sub-band select. Selects one of eight possible VCO sub-bands.

000 = selects SB0

001 = selects SB1

010 = selects SB2

101

011 = selects SB3

100 = selects SB4

101 = selects SB5

110 = selects SB6

111 = selects SB7

LD

2

Lock-detect enable.

1

0 = disabled

1 = enabled

VDIV[1:0]

1, 0

VCO divider ratio select.

00 = sets VCO divider to 4

01

01 = sets VCO divider to 8

10 = sets VCO divider to 16

11 = sets VCO divider to 32

10 ______________________________________________________________________________________

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