MC44BS373CAD datasheet(11/52 Pages) MOTOROLA

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MOTOROLA

MC44BS373CA Data Sheet

I2C Programming

Table 15 lists the UHF settings used.

Table 16 lists the other settings used.

Table 17 lists settings of fields X2, X1, and X0, used to set the device into test mode 1 and to control the

VHF range.

NOTE

Test modes 1 and 2 are intended for manufacturing test purposes only and

cannot be used for normal applications, except for VHF range (states 1.b

to 1.e).

Table 15. UHF Settings

Bit

Value

Setting

UHF Oscillator

OSC

Normal operation

UHF oscillator disabled (oscillator and PLL sections bias turned off)

Modulator Output Attenuation

ATT

Normal operation

Modulator output attenuation (sound and video modulators sections bias turned off)

Table 16. Other Settings

Bit

Value

Setting

Sound PLL

SREF

Sound reference frequency = 31.25 kHz.

Sound reference frequency = 62.5 kHz.

Logic Output Port

LOP

LOP pin is low voltage.

LOP pin is high impedance.

Standby Mode

OSC

ATT

1, 1, 1

Puts the MC44BS373CA into standby mode. See Section 15.3, “Standby Mode,” for

more information.

Table 17. Write Mode—Test Mode 1 and VHF Range

State

Description

1.a

Normal operation

1.b

RF frequency divided for low-frequency testing or VHF range: RF/2

010

1.c

RF/4

011

1.d

RF/8

100

1.e

RF/16

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