ISL5239 Datasheet, PDF (27/31 Pages) Intersil Corporation – Pre-Distortion Linearizer

ISL5239
BIT
FUNCTION
15:1 Reserved
0
Reserved
TABLE 32. STATUS
TYPE: PRE-DISTORTER, ADDRESS: 0x1d
DESCRIPTION
Not used.
Internal use only.
BIT
15:14
13:12
11:9
8
7:6
5:4
FUNCTION
Reserved
Reserved
Reserved
Reserved
Reserved
IF Conv. Mode
3
Reserved
2
IF Conv. Status Clear
1
IF Conv. Bypass
0
IF Conv. Reset
TABLE 33. CONTROL
TYPE: IF CONVERTER, ADDRESS: 0x20
DESCRIPTION
Not used.
Internal use only.
Not used.
Internal use only.
Not used.
Selects the operational mode of the IF converter as:
00 - Disabled. Default mode which zeroes data into pipeline.
01 - Real x1. Real I outputs only, shifted by Fs/4.
10 - Real x2. Real samples output shifted by Fs/4. The sample on the I port is the first, earlier, sample of
the pair.
11 - Complex. Complex outputs shifted by Fs/4.
Not used.
When set high, clears the IF Conv. status bits. Set low for normal operation and to allow the status bits
to update.
When set high (default), bypasses the IF conv. stage. Set low for normal processing.
When set high, resets the IF conv. state machine. Set low (default) for normal operation.
TABLE 34. STATUS
TYPE: IF CONVERTER, ADDRESS: 0x21
BIT
FUNCTION
DESCRIPTION
15:4 Reserved
Not used.
3:2
Reserved
Internal use only.
1
I Channel Saturation
When high, indicates the IF conv. saturated at least one sample since the last control word 0x20, bit 2
command.
0
Q Channel Saturation When high, indicates the IF conv. saturated at least one sample since the last control word 0x20, bit 2
command.
BIT
15
14:12
11:10
9:8
7:5
4
3
2
1
0
TABLE 35. CONTROL
TYPE: CORRECTION FILTER, ADDRESS: 0x28
FUNCTION
DESCRIPTION
Reserved
Not used.
Reserved
Internal use only.
Reserved
Not used.
Reserved
Internal use only.
Reserved
Not used.
Address Auto Increment Set high to automatically increment coef/address after any access operation (read/write). Low (default) is
not auto increment.
Real Pipeline Select
Set high to configure the filter to process muxed real data, with the values arriving on the IIN<17:0> port
in serial fashion with I following Q. Set low (default) for complex operation.
Clear Status
Set high to clear all status bits, low for normal status bit updates.
Bypass
Set high (default) to bypass the correction filter, low to enable processing.
Reserved
Not used.
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