MC44BC373C/374C Technical Data

I2C Bit Mapping

WRITE MODE

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

ACK

CA—CHIP ADDRESS

11001010

ACK

C1—High Order Bits

1

0

SO

LOP

PS

X3

X2

SYSL

ACK

C0—Low Order Bits

PWC

OSC

ATT

SFD1

SFD0

TB1

X5

X4

ACK

FM—High Order Bits

0

TPEN

N11

N10

N9

N8

N7

N6

ACK

FL—Low Order Bits

N5

N4

N3

N2

N1

N0

X1

X0

ACK

READ MODE

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

ACK

CHIP ADDRESS

11001011

ACK

R—Status Byte

—————

Y2

Y1

OOR

-

Bit Name

Description

PWC

Peak White Clip enable/disable

OSC

UHF oscillator ON/OFF

ATT

Modulator output attenuated—sound and video modulators ON/OFF

SFD0, 1

Sound subcarrier frequency control bits

TB1

Test mode bit—bus format compatible with MC44353

SO

Sound Oscillator ON/OFF

LOP

Logic Output Port

PS

Picture-to-sound carrier ratio

SYSL

System L enable—selects AM sound and positive video modulation (MC44BC373C only)

TPEN

Test pattern enable—picture and sound

X5…X0

Test mode bits—All bits are 0 for normal operation (see Test Mode tables, page 6 & page 7)

N0…N11

UHF frequency programming bits, in steps of 250kHz

OOR

RF oscillator out-of-frequency range information

Y1, Y2

RF oscillator operating range information

Freescale Semiconductor, Inc.

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