MC44864 データシートの表示（PDF） - Motorola => Freescale

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MC44864

PLL TUNING CIRCUIT WITH 1.3 GHz PRESCALER AND D/A CONVERTERS

Motorola => Freescale 

MC44864

Figure 5. TV Tuner for Automatic Alignment

IF

12 V

VCC3

AGC

Filter

Antenna

UHF VHF BIII

Filter

Mixer

Local

Oscillator

DA3

DA2

DA1

Band Buffers

33 V

VCC2

HF Input

MC44864

PLL–D/A IC

VCC1

5.0 V

Clock

SCL

XTAL

Data

SDA

VTUN

Amp In

Phase Cmp

D–to–A

Converters

NVM

CA1_PLL Chip Address

CO_Control Information

BA_Band Information

FM_Frequency Information (with MSB)

FL_Frequency Information (with LSB)

Figure 6. Definition of Bytes

ÉÉÉÉ1 ÉÉÉÉ1ÉÉÉÉÉÉ0 ÉÉÉÉ0ÉÉÉÉÉÉA3 ÉÉÉÉA2ÉÉÉÉÉÉA1 ÉÉÉÉA0=ÉÉ0 ÉÉAÉÉCK ÉÉ

ÉÉÉÉB17ÉÉÉÉRXÉÉ6 ÉÉÉÉBT5 ÉÉÉÉPXÉÉÉÉÉÉRB33 ÉÉÉÉRX2ÉÉÉÉÉÉRB11 ÉÉÉÉRX0ÉÉÉÉAAÉÉCCKK ÉÉ

0

N14

N13

N12

N11

N10

N9

N8

ACK

N7

N6

N5

N4

N3

N2

N1

N0

ACK

Chip Addresses

The chip address is programmable by Pin CA.

The PLL addresses C0, C2, C4, C6 are officially allocated

to PLL–IC’s.

The addresses C8, CA, CC, CE are not officially allocated.

Care has to be taken in the application that no conflict occurs

with other devices on the same I2C Bus when using the

addresses C8 to CE.

CA Pin (13) A3 A2 A1 A0 Address Function

–0.04 VCC1 to 0 0 0 0

C0

1st PLL

0.1 VCC1

0010

C2

1st DAC

Open or 0.2

0100

VCC1to0.3VCC1 0 1 1 0

C4

2nd PLL

C6

2nd DAC

0.42 VCC1 to

0.75 VCC1

1000

1010

C8

3rd PLL

CA

3rd DAC

0.9 VCC1 to 1.2 1 1 0 0

CC

4th PLL

VCC1

1110

CE

4th DAC

PLL SECTION

Data Format and Bus Receiver

The circuit receives the information for tuning and control

via I2C Bus. The incoming information is treated in the bus

receiver. The definition of the permissible bus protocol is

shown in the four examples below:

Ex. 1 STA CA1 CO

Ex. 2 STA CA1 FM

Ex. 3 STA CA1 CO

Ex. 4 STA CA1 FM

BA STO

FL STO

BA FM FL

FL CO BA

STO

STO

STA = Start Condition

STO = Stop Condition

CA1 = Chip Address Byte of the PLL Section

CO = Data Byte for Control Information

BA = Band Information

FM = Data Byte for Frequency Information (MSB’s)

FL = Data Byte for Frequency Information (LSB’s)

Figure 6 shows the five bytes of information that are

needed for circuit operation: there is a chip address, two

bytes of control and band information and two bytes of

frequency information.

8

MOTOROLA ANALOG IC DEVICE DATA

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