9 I2C Bit Mapping Table " />
參數(shù)資料
型號： MC44BS373CAFCR2
廠商： Freescale Semiconductor
文件頁數(shù)： 51/52頁
文件大?。?/td> 0K
描述： IC MODULATOR AUD/VID U/V 20-QFN
標準包裝： 2,500
類型： NTSC/PAL 調(diào)制器
應(yīng)用： 音頻/視頻，VCR，機頂盒
安裝類型： 表面貼裝
封裝/外殼： 20-VQFN 裸露焊盤
供應(yīng)商設(shè)備封裝： 20-QFN 裸露焊盤（5x5）
包裝： 帶卷 (TR)
MC44BS373CA Data Sheet
I2C Bit Mapping
9 I2C Bit Mapping
Table 8. I2C Write-Mode Bit Mapping
Write Mode
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
ACK
Chip address
1
0
1
0
ACK
C1—High-order bits
1
0
SO
LOP
PS
X3
X2
SYSL
ACK
C0—Low-order bits
PWC
OSC
ATT
SFD1
SFD0
SREF
X5
X4
ACK
FM—High-order bits
0
TPEN
N11
N10
N9
N8
N7
N6
ACK
FL—Low-order bits
N5
N4
N3
N2
N1
N0
X1
X0
ACK
Table 9. I2C Read-Mode Bit Mapping
Read Mode
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
ACK
Chip address
11
001
1
ACK
R—Status byte
—
————
Y2
Y1
OOR
—
Table 10. I2C Bit Mapping Bit Descriptions
Name
Description
SO
Sound oscillator on/off
0 Sound oscillator on (normal mode)
1 Sound oscillation disabled (oscillator and PLL section bias turned off)
LOP
Logic output port
0 LOP pin is low voltage.
1 LOP pin is high impedance.
PS
Picture-to-sound carrier ratio
0 Picture-to-sound carrier ratio is 12 dB.
1 Picture-to-sound carrier ratio is 16 dB.
X0–X5
Test mode bits
Note: All bits are 0 for normal operation. For further information, see Table 17 and Table 18.
SYSL
System L enable—Selects AM sound and positive video modulation
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 enable/disable
0 Peak white clip on (system B/G)
1 Peak white clip off (system L)
OSC
UHF oscillator on/off
0 Normal operation
1 UHF oscillator disabled (oscillator and PLL sections bias turned off)
ATT
Modulator output attenuated-sound and video modulators on/off
0 Normal operation
1 Modulator output attenuation (sound and video modulators sections bias turned off)
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