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參數(shù)資料
| 型號(hào)： | CDCE401 |
| 廠(chǎng)商： | Texas Instruments, Inc. |
| 英文描述： | Oscillator IC with Electronic Calibration |
| 中文描述： | 具有電子校準(zhǔn)的振蕩器 IC |
| 文件頁(yè)數(shù)： | 9/19頁(yè) |
| 文件大?。?/td> | 246K |
| 代理商： | CDCE401 |
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REGISTER DESCRIPTION
CDCE401
SCAS820–JUNE 2006
WORD 0:
BIT
0
1
2
3
4
5
6
7
8
9
NAME
DESCRIPTION/FUNCTION
TYPE
W
W
W
W
W
W
W
W
W
W
DEFAULT
0
0
0
0
0
0
0
1
1
0
C0
C1
CXI0
CXI1
CXI2
CXI3
CXI4
CXI5
CXI6
CXI7
Register selection
Register selection
Load capacitance XIN, bit 0
Load capacitance XIN, bit 1
Load capacitance XIN, bit 2
Load capacitance XIN, bit 3
Load capacitance XIN, bit 4
Load capacitance XIN, bit 5
Load capacitance XIN, bit 6
Load capacitance XIN, bit 7
WORD 1:
BIT
0
1
2
3
4
5
6
7
8
9
NAME
DESCRIPTION/FUNCTION
TYPE
W
W
W
W
W
W
W
W
W
W
DEFAULT
1
0
0
0
0
0
0
1
1
0
C0
C1
CXO0
CXO1
CXO2
CXO3
CXO4
CXO5
CXO6
CXO7
Register selection
Register selection
Load capacitance XOUT, bit 0
Load capacitance XOUT, bit 1
Load capacitance XOUT, bit 2
Load capacitance XOUT, bit 3
Load capacitance XOUT, bit 4
Load capacitance XOUT, bit 5
Load capacitance XOUT, bit 6
Load capacitance XOUT, bit 7
WORD 2:
BIT
0
1
2
3
4
5
6
7
8
9
NAME
DESCRIPTION/FUNCTION
TYPE
W
W
W
W
W
W
W
W
W
W
DEFAULT
0
1
0
0
0
1
1
0
0
0
C0
C1
PD0
PD1
PD2
OG0
OG1
OP0
OP1
OP2
Register selection
Register selection
Post-divider selection, bit 0
Post-divider selection, bit 1
Post-divider selection, bit 2
Oscillator gain definition, bit 0
(1)
Oscillator gain definition, bit 1
(1)
Oscillator operating-point adjustment, bit 0
(1)
Oscillator operating-point adjustment, bit 1
(1)
Oscillator operating-point adjustment, bit 2
(1)
(1)
The oscillator gain bits have impact on the capacitance C
. See the table for input capacitance values. The oscillator operating-point
bits OP[2:0] are used to set the bias point of the oscillator core stage. In combination with setting the post-divider ratio PD[2:0] = 111,
the current consumption can be optimized to set oscillator core current consumption for lower frequencies and higher frequencies. This
ensures that the oscillator core is in operating optimally for phase noise and low XTAL-drive power. Setting core power too high impacts
XTAL-drive power, which affects the lifetime of the crystal.
9
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