10 I2C Programming WRITE " />
參數(shù)資料
型號(hào)： MC44BS374T1EF
廠商： Freescale Semiconductor
文件頁數(shù)： 33/34頁
文件大?。?/td> 0K
描述： IC AUDIO/VIDEO MODULATOR 16-SOIC
標(biāo)準(zhǔn)包裝： 48
類型： NTSC/PAL 調(diào)制器
應(yīng)用： 音頻/視頻，VCR，機(jī)頂盒
安裝類型： 表面貼裝
封裝/外殼： 16-SOIC（0.154"，3.90mm 寬）
供應(yīng)商設(shè)備封裝： 16-SOIC N
包裝： 管件
MC44BS374T1/374T1A Advance Information
I2C Programming
10 I2C Programming
WRITE MODE: Test Mode 1 and VHF Range
X2
X1
X0
State
Description
0
1.a
Normal operation
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.d
RF/8
1
0
1.e
RF/16
1
0
1
1.f
DC drive applied to modulators: Non-inverted video at TVOUT
1
0
1.g
DC drive applied to modulators: Inverted video at TVOUT
1
1.h
Transient output inhibit disabled (ie speed up mode)
During this speed-up test mode, ATT=0 forces sound current source to 1
A, and
ATT=1 forces it to 10
A.
Sound
Video
SFD1
SFD0
Sound Subcarrier Freq (MHz)
00
4.5
01
5.5
10
6.0
11
6.5
PS
Picture-to-Sound Ratio (dB)
012
116
SO
Sound Oscillator
0
Sound oscillator ON (Normal mode)
1
Sound oscillation disabled (oscillator and PLL
section bias turned OFF)
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)
1
Test pattern signal ON (picture and sound)
UHF
Standby Mode
Logic Output Port
OSC
UHF Oscillator
1
Normal operation
0
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.
OSC
SO
ATT
Combination of 3-bits
0
1
Modulator standby mode
LOP
Description
0
Pin 3 is low voltage
1
Pin 3 is high impedance
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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