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| 型號(hào)： | 935272702551 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | ADC |
| 英文描述： | 3-CH 8-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PQFP144 |
| 封裝： | 20 X 20 MM, 1.40 MM HEIGHT, LEAD FREE, PLASTIC, SOT-486-1, LQFP-144 |
| 文件頁(yè)數(shù)： | 19/61頁(yè) |
| 文件大小： | 326K |
| 代理商： | 935272702551 |
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2004 May 18
26
Philips Semiconductors
Product specication
Triple 8-bit video ADC up to 270 Msps
TDA8754
9.4
Coarse registers (R, G and B)
The coarse gain of the AGC is controlled with 7 bits. The code gain can vary from 32 to 95; see Table 18.
Table 16 Coarse gain registers (01h, 04h, 07h) bit allocation
Table 17 Coarse gain registers (01h, 04h, 07h) bit description
Table 18 Coarse register
:
::
0 86
010000110
134
134/135
0 87
010000111
135
135/136
REGISTER
76543210
COARSER (01h)
OR8
CR6
CR5
CR4
CR3
CR2
CR1
CR0
COARSEG (04h)
OG8
CG6
CG5
CG4
CG3
CG2
CG1
CG0
COARSEB (07h)
OB8
CB6
CB5
CB4
CB3
CB2
CB1
CB0
Default
01000110
BIT
SYMBOL
DESCRIPTION
COARSER (address: 01h)
7
OR8
offset R channel; MSB bit of offset value
6 to 0
CR[6:0]
coarse gain of the AGC for R channel
COARSEG (address: 04h)
7
OG8
offset G channel; MSB bit of offset value
6 to 0
CG[6:0]
coarse gain of the AGC for G channel
COARSEB (address: 07h)
7
OB8
offset B channel; MSB bit of offset value
6 to 0
CB[6:0]
coarse gain of the AGC for B channel
DECIMAL
VALUE
CR6
CR5
CR4
CR3
CR2
CR1
CR0
Vi TO BE FULL-SCALE
GAIN ADC
CG6
CG5
CG4
CG3
CG2
CG1
CG0
CB6
CB5
CB4
CB3
CB2
CB1
CB0
32
0100000
1.000
33
0100001
0.992
1.008
::
:
63
0111111
0.753
1.328
64
1000000
0.746
1.340
65
1000001
0.738
1.355
::
:
HEX
VALUE
OR8
OR7
OR6
OR5
OR4
OR3
OR2
OR1
OR0
CLAMP CODE
(DECIMAL)
ADC OUTPUT
(CODE TRANSITION)
OG8 OG7 OG6 OG5 OG4 OG3 OG2 OG1 OG0
OB8
OB7
OB6
OB5
OB4
OB3
OB2
OB1
OB0
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