WGCE5039 Intel, WGCE5039 Datasheet - Page 12

• Manufacturer Part Number: WGCE5039
• Manufacturer: Intel

Specifications of WGCE5039

• Lead Free Status / Rohs Status: Compliant

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
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.
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
Bit Field
Bit Field
Base Band Registers
7:0
4:0
6:3
2:0
7
6
5
7
See Section 3 Applications Information, for a typical programming example.
BG[3:0]
BR[4:0]
BF[7:0]
Name
Name
Name
BLF
SF
LF
-
-
BF[7
:
0]
Default
Default
=
Default
0X3C
1000
0111
000
(
Filter
0
0
0
-
Table 10 - Register 5
Table 11 - Register 6
Table 12 - Register 7
bandwidth
Crystal
Type
Type
Type
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Intel Corporation
R
CE5039
Frequency
12
(MHz)
Base Band Filter Cut-Off Frequency
Test Mode
Baseband Filter Adjust Disable
Baseband Filter Adjust Disable
Base Band Reference Division Ratio
Base Band Lock Flag
Base Band Gain Select
Test Modes
*
5.088
(MHz)
*
BR[4
Description
Description
Description
:
0])
−
1
Data Sheet