HFA3863IN96 Intersil Corporation, HFA3863IN96 Datasheet - Page 31

• Manufacturer Part Number: HFA3863IN96
• Description: Processor, Direct Sequence Spread Spectrum Base band Processor with Rake Receiver and Equalizer, Tape And Reel
• Manufacturer: Intersil Corporation

Bit 2
Bit 1
Bit 0
Bits 7:0
Bit 7
Bits 6:0
Bit 7:5
Bits 4:0
Bit 7
Bit 6
Bit 5
Bits 4:0
Bits 7:4
Bits 3:0
Bits 7:4
Bits 4:0
Bits 7:6
Bits 5:0
CONFIGURATION REGISTER ADDRESS 36 (48h) R/W DELAY SPREAD THRESHOLD FOR CMF CONTROL
CONFIGURATION REGISTER ADDRESS 37 (4Ah) R/W CW RSSI THRESHOLD FOR CMF CONTROL
Internal digital loop back mode (SDI pin becomes LOCK input to acquisition block).
0 = normal chip operation loop back disabled.
1 = loop back enabled, A/D and D/A converters bypassed, chip will not respond to external signals.
enable PN to lower test bus address (2–0).
0 = normal.
1 = PN to test bus address.
enable PN to upper test bus address (7–3).
0 = normal.
1 = PN to test bus address.
Address bits for various tests. See Tech Brief #TBD for a description of the factory test modes.
Energy Detect Threshold control.
0 = threshold is relative to noise floor.
1 = threshold is absolute.
ED Threshold. Range 0–127dBm. RSSI > threshold triggers ED.
Delay spread count. Range 0–7. Used for evaluation only.
Delay spread threshold. 0.xxxx.
This and the next three thresholds are used in the following formula to determine which CMF weights to use. CW detect is not
configurable.
If (CW and RSSI < (CW RSSI threshold + NoiseFloor)) or (no CW and RSSI < (SNR threshold #1 + NoiseFloor)) or (no CW
and delay spread < threshold and RSSI < (SNR threshold #2 + NoiseFloor)) then;
use Default CMF weights,
else,
use Calculated CMF weights.
R/W but not currently used internally, should be set to zero to ensure compatibility with future revisions.
Force default CMF weights.
0 = normal.
1 = force default CMF weights.
Force calculated CMF weights.
0 = normal.
1 = force calculated CMF weights.
Note: this cannot be combined with bit 6. A “1” on both will produce undefined results.
CW RSSI threshold, range 0–31dB.
CONFIGURATION REGISTER ADDRESS 38 (4Ch) R/W SNR THRESHOLD #1 FOR CMF CONTROL
R/W but not currently used internally, should be set to zero to ensure compatibility with future revisions.
SNR threshold #1 range 0–15dB.
CONFIGURATION REGISTER ADDRESS 39 (4Eh) R/W SNR THRESHOLD #2 FOR CMF CONTROL
R/W but not currently used internally, should be set to zero to ensure compatibility with future revisions.
SNR threshold #2, range 0–31dB.
R/W but not currently used internally, should be set to zero to ensure compatibility with future revisions.
DC offset Threshold, range 0 to 63dB. RSSI > (threshold + NoiseFloor) enables DC offset calculation and compensation.
CONFIGURATION REGISTER ADDRESS 33 (42h) R/W TEST MODES 2 (Continued)
CONFIGURATION REGISTER ADDRESS 40 (50h) R/W DC OFFSET THRESHOLD
31
CONFIGURATION REGISTER ADDRESS 34 (44h) R/W TEST BUS ADDRESS
CONFIGURATION REGISTER ADDRESS 35 (46h) R/W ED THRESHOLD
HFA3863