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Circuit Descriptions, Abbreviation List, and IC Data Sheets
9.3.4
Diagram B2A, NXT2004 (IC 7T22)
Block Diagram
IF In
Sense
RF Gain
IF AGC
RF AGC
Crystal
Tuner Control
GPIO
Smart Antenna
(CEA 909)
Pin Configuration
AVDD_PLL
1
DGND
2
AGND
3
ADC_VREF_N
4
ADC_VREF_P
5
ADC_INCM
6
ADC_INP
7
ADC_INN
8
AVDD_ADC
9
AVDD_ADC
10
AVDD_ADC
11
AGND
12
13
AGND
AGND
14
NC
15
VDD1.2
16
DGND
17
VDD2.5
18
DGND
19
AGND
20
AVDD
21
NC
22
VDD1.2
23
DGND
24
AGND
25
VSB/QAM
A/D
text
text
Demodulator
AGC
text
OSC
text
NXT2004
100-pin LQFP
(14 x 14 x 1.4 mm)
Figure 9-6 Internal block diagram and pin configuration
EL1.1U
MPEG
FEC
text
Transport
32K x 8
text
BERT
text
SRAM
µC
text
2
I
C
Compatible
I2C
text
Interface
Slave
9.
EN 133
75
DGND
74
DGND
73
DGND
72
DGND
71
MPEG_DATA_0
70
VDD3.3
MPEG_DATA_1
69
MPEG_DATA_2
68
MPEG_DATA_3
67
MPEG_DATA_4
66
DGND
65
VDD2.5
64
63
VDD1.2
62
MPEG_DATA_5
61
DGND
60
DGND
59
/POWER_RESET
58
MPEG_DATA_6
57
DGND
MPEG_DATA_7/SER_DATA
56
MPEG_DATA_EN
55
DGND
54
MPEG_PKT_SYNC
53
VDD1.2
52
51
MPEG_CLK
G_16290_085.eps
020206
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