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參數(shù)資料
| 型號(hào)： | MC44BC374EJBR2 |
| 廠商： | Freescale Semiconductor |
| 文件頁(yè)數(shù)： | 22/24頁(yè) |
| 文件大小： | 0K |
| 描述： | IC MODULATOR ANT BOOSTER 24TSSOP |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 類型： | 調(diào)制器 |
| 應(yīng)用： | 機(jī)頂盒 |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 24-TSSOP（0.173"，4.40mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 24-TSSOP |
| 包裝： | 帶卷 (TR) |
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I2C Programming
MC44BC373/374 Technical Data
7 I2C Programming
WRITE MODE: Test Mode 1 and VHF Range
X2
X1
X0
State
Description
000
1.a
Normal operation.
001
1.b
RF frequency divided for low frequency testing or VHF range: RF/2
010
1.cRF/4
011
1.dRF/8
100
1.eRF/16
101
1.f
DC drive applied to modulators: non-inverted video at TVOUT.
110
1.g
DC drive applied to modulators: inverted video at TVOUT.
111
1.h
Transient output inhibit disabled.
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).
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
11
1
Modulator standby mode ( sound
and UHF oscillator, sound and
video modulator section bias
turned OFF, and I2C 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.
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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