mc44bs374ca Freescale Semiconductor, Inc, mc44bs374ca Datasheet - Page 8

• Manufacturer Part Number: mc44bs374ca
• Description: Pll Tuned Uhf And Vhf Audio/video High Integration Modulator
• Manufacturer: Freescale Semiconductor, Inc

10 I
WRITE MODE: Test Mode 1 and VHF Range
Sound
Video
I2C Programming
TPEN
SFD 1
PWC
SO
PS
X2
0
0
0
0
1
1
1
1
0
0
1
1
0
1
0
1
0
1
0
1
2
Sound oscillator ON (Normal mode)
Sound oscillation disabled (oscillator and PLL
section bias turned OFF)
Peak White Clip ON (System B / G)
Peak White Clip OFF (System L)
Test pattern signal OFF (normal operation)
Test pattern signal ON (picture and sound)
C Programming
SFD 0
X1
0
0
1
1
0
0
1
1
0
1
0
1
Picture-to-Sound Ratio (dB)
X0
Sound Subcarrier Freq (MHz)
0
1
0
1
0
1
0
1
Test Pattern Signal
Sound Oscillator
Peak White Clip
State
1.a
1.b
1.d
1.e
1.g
1.h
1.c
1.f
12
16
Freescale Semiconductor, Inc.
For More Information On This Product,
4.5
5.5
6.0
6.5
Normal operation
RF frequency divided for low frequency testing or VHF range: RF / 2
RF / 4
RF / 8
RF / 16
DC drive applied to modulators: Non-inverted video at TVOUT
DC drive applied to modulators: Inverted video at TVOUT
Transient output inhibit disabled (ie speed up mode)
During this speed-up test mode, ATT=0 forces sound current source to 1µA, and
ATT=1 forces it to 10µA.
MC44BS374CA Technical data
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UHF
Standby Mode
Logic Output Port
OSC
OSC
LOP
ATT
0
1
0
1
1
0
1
Normal operation
UHF oscillator disabled (oscillator and PLL
sections bias turned OFF)
Normal operation
Modulator output attenuation (sound and
video modulators sections bias turned OFF.
Pin 3 is low voltage
Pin 3 is high impedance
Description
SO
1
Modulator Output Attenuation
ATT
1
Modulator standby mode
UHF Oscillator
Description
Combination of 3-bits