參數(shù)資料
型號(hào): STA400A
廠商: 意法半導(dǎo)體
英文描述: XMRADIO SDARS CHANNEL DECODER
中文描述: XMRADIO衛(wèi)星數(shù)字收音機(jī)信道解碼器
文件頁(yè)數(shù): 43/117頁(yè)
文件大?。?/td> 910K
代理商: STA400A
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STA400A
PFDTHR - Phase/Frequency Error Detector Threshold
This register sets the threshold for the frequency detector. The number format is positive integer.
SYMFREQ
-
Symbol Frequency
This register sets the symbol frequency of the Timing NCO (equal to 1.64MHz for both satellite demodulators).
It is 25 bit long and is divided into four bytes; SYMFREQ0 is the LSB byte, SYMFREQ3 is the MSB. SYMFREQ
must be loaded with an interger value given by
where F
MCLK
=
23.92MHz is the master clock frequency, F
sym
is the symbol frequency and Int(.) is the integer part of the number.
IFFREQ
-
Intemediate Frequency
This register sets the 2
nd
intermediate carrier frequency of the I/Q Mixer. It is 28 bit long and is divided into four
bytes; IFFREQ0 is the LSB byte, IFFREQ3 is the MSB. IFFREQ must be loaded with an interger value given by
F
F
MCLK
where F
MCLK
= 23.92MHz is the master clock frequency, F
c
is the second
intermediate frequency (5.175MHz for S2-Late satellite and 7.015MHz for S1-Early satellite) and Int(.) is the in-
teger part of the number.
Type:
SingleByte - R/W
Word Length:
6
Byte Name
Address (Hex)
Bit Map
Reset Value (Hex)
PFDTHR S1/S2
005B/0081
5-0
14
Type:
MultiBytes - R/W
Word Length:
25
Byte Name
Address (Hex)
Bit Map
Reset Value (Hex)
SYMFREQ3 S1/S2
005F/0085
24
00
SYMFREQ2 S1/S2
005E/0084
23-16
23
SYMFREQ1 S1/S2
005D/0083
15-8
1A
SYMFREQ0 S1/S2
005C/0082
7-0
8B
Type:
MultiBytes - R/W
Word Length:
28
Byte Name
Address (Hex)
Bit Map
Reset Value (Hex)
IFFREQ3 S1/S2
0063/0089
27-24
04/03
IFFREQ2 S1/S2
0062/0088
23-16
B1/76
IFFREQ1 S1/S2
0061/0087
15-8
3B/27
IFFREQ0 S1/S2
0060/0086
7-0
14/62
SYMFREQ
int 0.5
F
F
MCLK
-----------------
2
25
+
=
IFFREQ
int 0.5
-----------------
2
28
+
=
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