參數(shù)資料
型號(hào): STV0299B
廠商: 意法半導(dǎo)體
英文描述: QPSK/BPSK LINK IC
中文描述: 調(diào)制/ BPSK調(diào)制連接IC
文件頁(yè)數(shù): 9/36頁(yè)
文件大?。?/td> 242K
代理商: STV0299B
STV0299B
9/36
4
FUNCTIONAL DESCRIPTION
(continued)
Figure 4:
Clock Signal Generation
Note:
1
2
Refer to the Register List P[2:0] in table 1
At the rising edge of RESET signal (pin 15) the corresponding bit of the I
2
C bus register is forced to the status of pin STDBY or
to DIRCLK-DIS.
Divider Programming
K(1:0) in register
f
REF
= f
XTAL
divided by:
00
1
01
2
10
3
11
4
Table 1:
Table 2:
Summary of F
M_CLK
LPF
VCO
1/4
1/16
÷
R
1/2
PHASE
COMPARATOR
÷
(M+1)
1/6
TO SERIAL
SHIFTER
÷
(K+1)
OSC
÷
P(Note 1)
STDBY
DiSEqC/tone
burst modulator
1/0
Reg 08[2:0]
PROGRAMABLE
DIVIDER
DIRCLK-CTRL
1/0
XTAL OUT
XTAL IN/CLK-IN
DIRCLK-DIS
F22/
DiSEqC
TM
AUX_CLK
M_CLK
1
0
Note 2
VCO
ON/OFF
Note 2
VCO ON/OFF
STDBY
(I
C bit)
I
2
C
DIRCLK (I
2
C bit)
I
2
C
Reg 01[4:0]
Reg 01[7:6]
Reg 02[2:0]
Reg 04
Reg 03
PRESCALER
1/2
M(4:0) in register
f
VCO
= f
REF
multiplied by:
00000
4
00001
8
00010
12
00011
16
...
...
11111
128
P(2:0) in register
f
M_CLK
= f
VCO
divided by P:
4
6
8
12
16
24
32
48
000
001
010
011
100
101
110
111
DIRCLK_CTRL = 0
DIRCLK_CTRL =1
STDBY = 1
f
VCO
f
XTAL
4
K
1
1
+
-----+
×
=
f
M_CLK
f
P
-----------
=
f
M_CLK
f
CLK_IN
=
f
M_CLK
0
=
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