ISL5239 Datasheet, PDF (26/31 Pages) Intersil Corporation – Pre-Distortion Linearizer

ISL5239
BIT
FUNCTION
15:0 LUT Data I
TABLE 26. LOOK-UP TABLE REAL DATA
TYPE: PRE-DISTORTER, ADDRESS 0x17
DESCRIPTION
Real distortion data written to or read back from LUT. Selectable as (-0.5...(0.5-increment)) in increments
of 2^-16. Default = 0.
BIT
15:13
12
11:9
8
7:6
5:4
3:1
0
TABLE 27. MEMORY EFFECT CONTROL
TYPE: PRE-DISTORTER, ADDRESS: 0x18
FUNCTION
DESCRIPTION
Reserved
Not used.
Serial Output Enable
Set to high to enable the external serial interface output pins. Default is low, disabled.
Reserved
Not used
Serial Input Enable
Set to high to enable the external serial interface input pin SERIN data to override the processor settings.
Default is low, disabled, processor settings over-ride serial inputs.
Reserved
Not used.
Power Integrator Period
Select the number of samples in the power integrate/dump operation. Also controls the SERCLK
frequency.
00 - 128 samples, SERCLK runs at CLK/4.
01 - 64 samples, SERCLK runs at CLK/2.
10 - 32 samples, SERCLK runs at CLK.
Reserved
Thermal Coefficient B
Not used.
Set to high to select A², low to select B (default).
BIT
FUNCTION
15:0 Thermal Coef. A
TABLE 28. MEMORY EFFECT COEFFICIENT A
TYPE: PRE-DISTORTER, ADDRESS: 0x19
DESCRIPTION
Coefficient A for memory effect selectable from (-1.0...(1-increment)) in increments of 2^-15. If control word
0x18, bit 8 high, reading this control word returns the value from SERIN.
BIT
FUNCTION
15:0 Thermal Coef. B
TABLE 29. MEMORY EFFECT COEFFICIENT B
TYPE: PRE-DISTORTER, ADDRESS: 0x1a
DESCRIPTION
Coefficient B for memory effect selectable from (-1.0...(1-increment)) in increments of 2^-15. If control word
0x18, bit 8 high, reading this control word returns the value from SERIN.
TABLE 30. MEMORY EFFECT POWER INTEGRATOR LSW
TYPE: PRE-DISTORTER, ADDRESS: 0x1b
BIT
FUNCTION
DESCRIPTION
15:0 Power Integrator <15:0> Power integrator LSW.
TABLE 31. MEMORY EFFECT POWER INTEGRATOR MSW
TYPE: PRE-DISTORTER, ADDRESS: 0x1c
BIT
FUNCTION
DESCRIPTION
15:0 Power Integrator <31:16> Power integrator MSW. The Power Integrator [31:0] forms an unsigned fixed point number with 9 integer
and 23 fractional bits (u9.23).
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