LC72135M Ver la hoja de datos (PDF) - SANYO -> Panasonic

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Fabricante

LC72135M

PLL Frequency Synthesizer for Electronic Tuning

SANYO -> Panasonic 

LC72135M

2. DI Control Data Functions

No.

Control block/data

Functions

Programmable divider data • Data that sets the programmable divider.

P0 to P15

A binary value in which P15 is the MSB. The LSB changes depending on

DVS and SNS. (*: don’t care)

(1)

DVS, SNS

DVS SNS LSB

Divisor setting (N)

Actual divisor

1

*

P0

272 to 65535

Twice the value of the setting

0

1

P0

272 to 65535

The value of the setting

0

0

P4

4 to 4095

Note: P0 to P3 are ignored when P4 is the LSB.

The value of the setting

• Selects the signal input pin (AMIN or FMIN) for the programmable divider, switches

the input frequency range. (*: don’t care)

Reference divider data

R0 to R3

(2)

XS

IF counter control data

CTE

GT0, GT1

DVS SNS

Input pin

Input frequency range

1

*

FMIN

10 to 160 MHz

0

1

AMIN

2 to 40 MHz

0

0

AMIN

0.5 to 10 MHz

Note: See the “Programmable Divider” item for more information.

• Reference frequency (fref) selection data.

R3

R2

R1

R0

Reference frequency (kHz)

0

0

0

0

0

0

0

1

0

0

1

0

0

0

1

1

0

1

0

0

0

1

0

1

0

1

1

0

0

1

1

1

100

50

25

25

12.5

6.25

3.125

3.125

1

0

0

0

10

1

0

0

1

9

1

0

1

0

5

1

0

1

1

1

1

1

0

0

3

1

1

0

1

15

1

1

1

0

PLL INHIBIT + Xtal OSC STOP

1

1

1

1

PLL INHIBIT

Note: PLL INHIBIT

The programmable divider block and the IF counter block are stopped, the FMIN,

AMIN, HCTR and LCTR pins are set to the pull-down state (ground), and the charge

pump goes to the high impedance state.

• Crystal resonator selection

XS = 0: 4.5 MHz

XS = 1: 7.2 MHz

The 7.2 MHz frequency is selected after the power-on reset.

• IF counter measurement start data

CTE = 1: Counter start

CTE = 0: Counter reset

• Determines the IF counter measurement period.

Related data

IFS

GT1

GT0

Measurement time (ms)

0

0

4

0

1

8

1

0

32

1

1

64

(3)

Note: See the “IF Counter” item for more information.

IF counter selection data

LCTS

L/I1

• Data that specifies the IF counter input pin (and mode).

LCTS = 0: HCTR, LCTS = 1: LCTR

L/I1 = 0: I1 (Input port), L/I1 = 1: LCTR (AM IF counter)

Wait time (ms)

3 to 4

3 to 4

7 to 8

7 to 8

LCTS L/I1

0

0

0

1

LCTR/I1 pin

I1 (input port)

Off (pulled down)

HCTR pin

HCTR

(FM/AM IF counter)

1

0

I1 (input port)

1

1 LCTR (AM IF counter)

Off

(pulled down)

Continued on next page.

No. 5175-11/24

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