MC44BC374C 데이터 시트보기 (PDF) - Freescale Semiconductor
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MC44BC374C Datasheet PDF : 30 Pages
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Freescale Semiconductor, Inc.
8 I2C Programming
Sound
UHF
I2C Programming
SFD1 SFD0 Sound Subcarrier Freq (MHz)
0
0
4.5
0
1
5.5
1
0
6.0
1
1
6.5
PS
Picture-to-Sound Ratio (dB)
0
12
1
16
SO
Sound Oscillator
0 Sound oscillator ON (Normal mode)
1
Sound oscillation disabled (oscillator and PLL
section bias turned OFF)
Video
SYSL
System L/BG Selection
(MC44BC373C only)
0
System B/G enabled, System L disabled (FM
sound and negative video modulation)
1
System L enabled, System B/G disabled (AM
sound and positive video modulation)
PWC
Peak White Clip
0 Peak White Clip ON (System B/G)
1 Peak White Clip OFF (System L)
TPEN
Test Pattern Signal
0 Test pattern signal OFF (normal operation)
WRITE MODE: Test Mode 1 and VHF Range
OSC
UHF Oscillator
0 Normal operation
1
UHF oscillator disabled (oscillator and PLL
sections bias turned OFF)
ATT
Modulator Output Attenuation
0 Normal operation
1
Modulator output attenuation (sound and
video modulators sections bias turned OFF.
Standby Mode
OSC SO ATT
Combination of 3-bits
1
1 1 Modulator standby mode
MC44353/4/5 Compatibility
TB1
Description
0 Normal mode (Full programmability)
1
Limited programmability and compatibility with
MC44353
Logic Output Port
LOP
Description
0 Pin 3 is low voltage
1 Pin 3 is high impedance
X2
X1
X0 State
Description
0
0
0
1.a Normal operation
0
0
1
1.b RF frequency divided for low frequency testing or VHF range: RF/2
0
1
0
1.c RF/4
0
1
1
1.d RF/8
1
0
0
1.e RF/16
1
0
1
1.f DC drive applied to modulators: Non-inverted video at TVOUT
1
1
0
1.g DC drive applied to modulators: Inverted video at TVOUT
Transient output inhibit disabled (ie speed up mode)
1
1
1
1.h During this speed-up test mode, ATT=0 forces sound current source to 1µA, and
ATT=1 forces it to 10µA.
MC44BC373C/374C Technical Data
For More Information On This Product,
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