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參數資料
| 型號： | 935264530157 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP100 |
| 封裝： | SOT-317, MQFP-100 |
| 文件頁數： | 18/43頁 |
| 文件大小： | 254K |
| 代理商： | 935264530157 |
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1999 March 01
25
Philips Semiconductors
Product specication
Single chip DVB-C channel receiver
VES1820X
GLPF[1:0]
GLPF[1:0] determines the gain of the antialiasing filter according to the following
table :
GLPF[1:0]
Gain
00
1
01
2
10
4
11
8
SSAT[1:0]
SSAT[1:0] determines the number of samples during which the saturation counters
accumulate the saturations.
SSAT[1:0]
Number of samples
00
2048
01
4096
10
8192
11
16384
16.TEST
0F
16
READ/WRITE
The 3 LSBs of TEST register must be set LOW.
SELOUT[1:0] SELOUT[1:0] selects which data are sent to the TESTO outputs :
When SELOUT[1:0]=00 (default) TESTO=0000
16
When SELOUT[1:0]=01 :
- TESTO[16:9] is the real part of the output scatter
- TESTO[8:1] is the imaginary part of the output scatter
- TESTO[0] is the symbol clock output
When SELOUT[1:0]=10 :
- TESTO[16:9] is the real part of the equalizer coefficients
- TESTO[8:1] is the imaginary part of the equalizer coefficients
- TESTO[0] is a corresponding synchronization signal
When SELOUT[1:0]=11 :
- TESTO[16:10] is the real part of the output scatter
- TESTO[8:2] is the imaginary part of the output scatter
- TESTO[1] is the symbol clock output
- TESTO[9] is the demodulator data output
- TESTO[0] is the demodulator clock output
BYPIIC
When BYPIIC = 0 (default) CTRL1 output is tri-stated and CTRL2 is a control
output pin, which value is programmed by parameter CTRL2 of this register.
When BYPIIC = 1, pin CTRL1 outputs SDA input and CTRL2 outputs SCL input.
These 2 lines can be fed to the I2C interface of the tuner, so that this one can be
made inactive after the tuner has been programmed (better phase noise
characteristics).
CTRL2
CTRL2 controls the value of CTRL2 output pin when BYPIIC = 0.
17. RSCONF
10
16
READ/WRITE
IEI
When high, IEI inhibits setting the error indicator bit (MSB of the second byte) in
the MPEG2 packet in the event of an uncorrectable RS block. The default value is
IEI = 0.
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