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參數(shù)資料
| 型號(hào)： | MC44BC374T1D |
| 廠(chǎng)商： | MOTOROLA INC |
| 元件分類(lèi)： | 消費(fèi)家電 |
| 英文描述： | PLL Tuned PAL/NTSC UHF and VHF Audio/ Video High Integration Modulator IC |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PDSO16 |
| 封裝： | SO-16 |
| 文件頁(yè)數(shù)： | 7/24頁(yè) |
| 文件大?。?/td> | 635K |
| 代理商： | MC44BC374T1D |
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I
2
C Programming
MOTOROLA
MC44BC373/374
Technical Data
For More Information On This Product,
Go to: www.freescale.com
7
7 I
2
C Programming
WRITE MODE: Test Mode 1 and VHF Range
X2
X1
X0
State
Description
0
0
0
1
.
a
1
.
b
1
.
c
1
.
d
1
.
e
1
.
f
1
.
g
1
.
h
Normal operation.
0
0
1
RF frequency divided for low frequency testing or VHF range: RF/2
0
1
0
RF/4
0
1
1
RF/8
1
0
0
RF/16
1
0
1
DC drive applied to modulators: non-inverted video at TVOUT.
1
1
0
DC drive applied to modulators: inverted video at TVOUT.
1
1
1
Transient output inhibit disabled.
Sound
Video
SFD1
SFD0
Sound Subcarrier Freq (MHz)
0
0
4
.
5
5
.
5
6
.
0
6
.
5
0
1
1
0
1
1
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).
AUX
Auxiliary Audio Input
0
AUX input disabled (normal mode).
1
AUX input enabled.
SYSL
System L and B/G Selection
MC44BC373 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).
UHF
Standby Mode
MC44353/4/5 Compatibility
Logic Output Port
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).
OSC
SO
ATT
Combination of 3-bits
1
1
1
Modulator standby mode (sound
and UHF oscillator, sound and
video modulator section bias
turned OFF, and I
2
C bus section
standby mode)
—
BST is active.
TB1
Description
0
Normal mode (fully programmable).
1
Limited programmability and compatibility with
MC44353.
LOP
Description
0
Pin 3 is low voltage.
1
Pin 3 is high impedance.
F
Freescale Semiconductor, Inc.
n
.
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