參數(shù)資料
型號(hào)： HSP50214A
廠商： Intersil Corporation
英文描述： Programmable Downconverter
中文描述： 可編程變頻器
文件頁數(shù)： 49/60頁
文件大?。?/td> 467K
代理商： HSP50214A
49
CONTROL WORD 9: AGC CONFIGURATION 2 (SYNCHRONIZED TO PROCCLK)
BIT
POSITION
FUNCTION
DESCRIPTION
31-28
Reserved
Reserved.
27-16
Upper Limit
Maximum Gain/Minimum Signal. The upper four bits are used for exponent; the remaining bits
form the mantissa in the fractional offset binary: [eeeemmmmmmmm]. See the AGC Section for
details. Bit 27 is the MSB. The gain is in dB. G = (6.02)(eeee) + 20log
10
(1.0 + 0.mmmmmmmm)
eeee = Floor [log
2
(10
GAIN dB/20
)]
mmmmmmmm = Floor [512(10
GAIN dB/20
/2
eeee
- 1)]
15-12
Reserved
Reserved.
11-0
Lower Limit
Minimum Gain/Maximum Signal. The upper four bits are used for exponent; the remaining bits
form the mantissa in the fractional offset binary: [eeeemmmmmmmm]. See the AGC Section for
details. Bit 11 is the MSB. The gain is in dB. G = (6.02)(eeee) + 20log
10
(1.0 + 0.mmmmmmmm)
eeee = Floor [log
2
(10
GAIN dB/20
)]
mmmmmmmm = Floor [512(10
GAIN dB/20
/2
eeee
- 1)]
CONTROL WORD 10: AGC SAMPLE GAIN CONTROL STROBE (SYNCHRONIZED TO PROCCLK)
BIT
POSITION
FUNCTION
DESCRIPTION
N/A
Sample AGC Gain
Level
Writing to this location samples the output of the AGC loop filter to stabilize the value for
μ
P
reading.
CONTROL WORD 11: TIMING NCO CONFIGURATION (SYNCHRONIZED TO PROCCLK)
BIT
POSITION
FUNCTION
DESCRIPTION
31-6
Reserved
Reserved.
5
Enable External
Timing NCO Sync
0- SYNCIN2 has no effect on the timing NCO.
1- When SYNCIN2 is asserted, the timing NCO center frequency and phase are updated with
the value loaded in their holding registers. If bit 0 of this word is set to 1, the phase accumulator
feedback is also zeroed.
4-3
Number of Offset
Frequency Bits
00 - 8 bits.
01 - 16.
10 - 24.
11 - 32.
2
Enable Offset
Frequency
0- Zero Offset Frequency to Adder.
1- Enable Offset Frequency.
1
Clear Phase
Accumulator
0- Enable Accumulator.
1- Zero Feedback in Accumulator.
0
Timing NCO Phase
Accumulator Load
On Update
When this bit is set to 1, the
μ
P update to the timing NCO frequency or an external timing NCO
load using SYNCIN2 will zero the feedback of the phase accumulator as well as update the
phase and frequency. This function can be used to set the NCO to a known phase synchronized
to an external event.
CONTROL WORD 12: TIMING NCO CENTER FREQUENCY (SYNCHRONIZED TO PROCCLK)
BIT
POSITION
FUNCTION
DESCRIPTION
31-0
Timing NCO Center
Frequency
These bits control the frequency of the timing NCO. The frequency range of the NCO is from 0
to F
RESAMP
where F
RESAMP
is the input sample rate to the resampling filter. The bits are com-
puted by the equation: N =(f
OUT
/F
RESAMP
)*2
32
. Bit 31 is the MSB. This location is a holding
register. After loading, a transfer to the Active Register is done by writing to Control Word 14 or
by generating a SYNCIN2 with Control Word 11, Bit 5 set to 1.
HSP50214A
相關(guān)PDF資料
PDF描述
HSP50214AVC Programmable Downconverter
HSP50214AVI Programmable Downconverter
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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HSP50214AVI 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Programmable Downconverter
HSP50214B 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Programmable Downconverter
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