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參數(shù)資料
| 型號： | ZL10039LCG1 |
| 廠商： | ZARLINK SEMICONDUCTOR INC |
| 元件分類： | 消費家電 |
| 英文描述： | Test, Recorder RoHS Compliant: NA |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, QCC28 |
| 封裝： | 5 X 5 MM, LEAD FREE, MO-220, QFN-28 |
| 文件頁數(shù)： | 12/35頁 |
| 文件大?。?/td> | 694K |
| 代理商： | ZL10039LCG1 |
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ZL10039
Data Sheet
12
Zarlink Semiconductor Inc.
The LEN bit enables the RFBYPASS output. With this bit set, the RF Bypass is active even if ‘software’ or
‘hardware’ power down has been selected.
2.3 Base Band Registers
There are three registers that control the Base Band:
The bits BF[7:0] control the bandwidth of the baseband filter. An automatic adjustment routine synchronizes the
filter bandwidth to a reference frequency derived from the crystal.
The LF and SF bits disable the baseband filter adjustment. It is recommended that these bits are set after
programming the filter bandwidth to prevent interactions within the circuit. These bits must be reset to enable the
baseband filter bandwidth to be reprogrammed.
The BR[4:0] bits set the crystal reference divide ratio. This effectively determines the resolution setting of the
baseband filters. The baseband filter settings (BF[7:0]) can be calculated from the following equation.
See Section 3 Applications Information, for a typical programming example.
BR[4:0] = 0 is invalid
The BLF bit indicates that the baseband adjustment has completed and locked.
The control bits BG[3:0] define the gain of the Base Band post-filter amplifier. The following table shows the gain -
note this is relative gain. The 1.5 dB gain steps enable the baseband output level to be adjusted and optimise gain
distribution for different symbol rates.
Bit Field
Name
Default
Type
Description
7:0
BF[7:0]
0X3C
R/W
Base Band Filter Cut-Off Frequency
Table 10 - Register 5
Bit Field
Name
Default
Type
Description
7
-
0
R/W
Test Mode
6
LF
0
R/W
Baseband Filter Adjust Disable
5
SF
0
R/W
Baseband Filter Adjust Disable
4:0
BR[4:0]
1000
R/W
Base Band Reference Division Ratio
Table 11 - Register 6
Bit Field
Name
Default
Type
Description
7
BLF
-
R
Base Band Lock Flag
6:3
BG[3:0]
0111
R/W
Base Band Gain Select
2:0
-
000
R/W
Test Modes
Table 12 - Register 7
1
(
=
(MHz)
Frequency
Crystal
0])
:
BR[4
5.088
(MHz)
bandwidth
Filter
0]
:
BF[7
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