FS6377-01I データシートの表示（PDF） - AMI Semiconductor
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FS6377-01I Datasheet PDF : 21 Pages
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FS6377-01/FS6377-01g Programmable 3-PLL Clock Generator IC
Data Sheet
Table 8. PLL Tuning Bits
Name
LFTC_A
(Bit 20)
LFTC_B
(Bit 44)
LFTC_C1
(Bit 68)
LFTC_C2
(Bit 92)
CP_A
(Bit 19)
CP_B
(Bit 43)
CP_C1
(Bit 67)
CP_C2
(Bit 91)
Description
Loop Filter Time Constant A
Bit = 0
Short time constant: 7ms
Bit = 1
Long time constant: 20ms
Loop Filter Time Constant B
Bit = 0
Short time constant: 7ms
Bit = 1
Long time constant: 20ms
Loop Filter Time Constant C1
selected when the SEL_CD pin = 0
Bit = 0
Short time constant: 7ms
Bit = 1
Long time constant: 20ms
Loop Filter Time Constant C2
selected when the SEL_CD pin = 1
Bit = 0
Short time constant: 7ms
Bit = 1
Long time constant: 20ms
Charge Pump A
Bit = 0
Current = 2mA
Bit = 1
Current = 10mA
Charge Pump B
Bit = 0
Current = 2mA
Bit = 1
Current = 10mA
Charge Pump C1
selected when the SEL_CD pin = 0
Bit = 0
Current = 2mA
Bit = 1
Current = 10mA
Charge Pump C2
selected when the SEL_CD pin = 1
Bit = 0
Current = 2mA
Bit = 1
Current = 10mA
Table 9. Mux Select Bits
Name
Description
MUX A Frequency Select
Bit 23
Bit 22
0
MUX_A[1:0]
(Bits 23-22)
0
1
0
Reference frequency
1
PLL A frequency
0
PLL B frequency
1
1
PLL C frequency
MUX B Frequency Select
Bit 47
Bit 46
0
MUX_B[1:0]
(Bits 47-46)
0
1
0
Reference frequency
1
PLL A frequency
0
PLL B frequency
1
1
PLL C frequency
MUX C1 Frequency Select
selected when the SEL_CD pin = 0
Bit 71
Bit 70
0
MUX_C1[1:0]
(Bits 71-70)
0
1
0
Reference frequency
1
PLL A frequency
0
PLL B frequency
1
1
PLL C frequency
MUX C2 Frequency Select
selected when the SEL_CD pin = 1
Bit 125 Bit 124
0
MUX_C2[1:0]
(Bits 125-124)
0
1
0
Reference frequency
1
PLL A frequency
0
PLL B frequency
1
1
PLL C frequency
MUX D1 Frequency Select
selected when the SEL_CD pin = 0
Bit 95
Bit 94
0
MUX_D1[1:0]
(Bits 95-94)
0
1
0
Reference frequency
1
PLL A frequency
0
PLL B frequency
1
1
PLL C frequency
MUX D2 Frequency Select
selected when the SEL_CD pin = 1
Bit 127 Bit 126
0
MUX_D2[1:0]
(Bits 127-126)
0
1
0
Reference frequency
1
PLL A frequency
0
PLL B frequency
1
1
PLL C frequency
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