ISL5239 Datasheet, PDF (23/31 Pages) Intersil Corporation – Pre-Distortion Linearizer

ISL5239
TABLE 10. OPERATING MODES
TYPE: CAPTURE MEMORY, ADDRESS: 0x07
BIT
FUNCTION
DESCRIPTION
15:5 Reserved
Not used.
4
Feedback Memory Mode Selects the feedback memory operating mode as
0 - Idle. (default) Memory not operating.
1 - Capture. Memory is capturing data in accordance with the mode and trigger settings specified in
control word 0x08.
3:2
Reserved
Not used.
1:0
Input Memory Mode
Selects the capture memory operating mode as
00 - Idle. (default) Memory not operating.
01 - Capture. Memory is capturing data in accordance with the mode and trigger settings specified in
control word 0x06.
10 - Loop. Input memory plays back data in a continuous loop to provide stimulus.
11 - Single. Input memory plays back data in a one pass through its contents to provide stimulus.
TABLE 11. FEEDBACK MEMORY CATPURE MODE AND TRIGGER DELAY
TYPE: CAPTURE MEMORY, ADDRESS: 0x08
BIT
FUNCTION
DESCRIPTION
15
Feedback Memory
Capture Mode
Selects the active capture mode when the feedback capture memory is running. Identical to input capture
mode except applies to the feedback memory.
0 - Delay. (default) Defines the beginning of the 1k sample capture window as the trigger point plus the
feedback trigger delay counter samples.
1 - Advance. Defines the end of the 1k-sample capture window as the trigger point plus the feedback
trigger delay counter samples.
See control word 0x07, bit 4 for mode selection
14:0 Feedback Trigger Delay Offset delay that defines the feedback memory capture window when control word 0x07, bits 4 = 1
Counter
(Capture mode)
When control word 0x08, bit 15 is set to 0, delay mode, values selectable from 2⁰ to 2¹⁵ (0...32767)
When control word 0x08, bit 15 is set to 1, advance mode, value selectable from 2⁰ to 2¹⁰ (0...1023)
TABLE 12. MAGNITUDE THRESHOLD MINIMUM VALUE
TYPE: CAPTURE MEMORY, ADDRESS: 0x09
BIT
FUNCTION
DESCRIPTION
15:0
Magnitude Threshold
Default = 0. Value selectable from 2⁰ to 2¹⁶ (0...65535). Magnitude-based trigger is generated when the
Minimum
magnitude value is greater than or equal to this value and less than or equal to the value in control word
0x0a.
TABLE 13. MAGNITUDE THRESHOLD MAXIMUM VALUE
TYPE: CAPTURE MEMORY, ADDRESS: 0x0a
BIT
FUNCTION
DESCRIPTION
15:0
Magnitude Threshold
Default = 0. Value selectable from 2⁰ to 2¹⁶ (0...65535). Magnitude-based trigger is generated when the
Maximum
magnitude value is less than or equal to this value and greater than or equal to the value in control word
0x09
BIT
15:11
10:0
FUNCTION
Reserved
Memory Address
TABLE 14. MEMORY ADDRESS
TYPE: CAPTURE MEMORY, ADDRESS: 0x0b
DESCRIPTION
Not used.
Index into memory value. Default = 0. Selectable from 2⁰ to 2¹¹ (0...2047).
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