HFA3861AIN Intersil Corporation, HFA3861AIN Datasheet - Page 28

• Manufacturer Part Number: HFA3861AIN
• Description: Processor, Direct Sequence Spread Spectrum Base band Processor
• Manufacturer: Intersil Corporation

Bits 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Bit 7
Bits 6:0
Bits 7:4
Bits 3:0
Bits 7:5
Bits 4:0
Bits 7:6
Bit 5:0
Bits 7:1
Bit 0
AGC continuous update
0 = disable
1 = allow updates during freeze AGC and AGClock. CR26 bit 3 must be a ‘1’ for this mode to work.
rxRFAGC polarity control.
0 = normal
1 = invert
AGC extra update disable. Allows final update when AGClock is declared
0 = enable an extra update
1 = disable extra update
AGC lock verify
0 = lock verify
1 = disable lock verify
AGC run on freeze- AGC keeps running after acquisition is complete, only signal is updated, no changes to IF or RF gain occur
0 = normal
1 = enabled
AGC override Enable, if set, CR25 controls receiver gain in both RF and IF
0 = normal
1 = enabled
AGC random I/Q allows random data on AGC 6-bit I/Q inputs if PN is enabled
0 = normal
1 = enabled
AGC test math- always accumulates in gain adjust, always outputs mean power from log table.
0 = normal
1 = enabled
RXRF flag
0 = normal
1 = disables threshold
AGC threshold (0-64 range)
Mid sat attenuation (0-30 range). Note: mid sat attenuation is programmed as value times 2. These attenuator steps will occur
if the number of I and Q saturations are greater than the mid and low saturation counts set by CR16.
low sat attenuation (0-15 range)
R/W but not currently used internally, should be set to zero to ensure compatibility with future revisions.
AGC lock window negative side. (0-15 range) (outer lock window) Note: set as a positive number, logic will convert to negative.
R/W but not currently used internally, should be set to zero to ensure compatibility with future revisions.
Carrier Sense 2 scale factor (0-7.875 range) (000000 - 100000). Used when DotProduct is source of CS2 calculation
7 bits to DAC input, -64 to 63 range
unused
CONFIGURATION REGISTER ADDRESS 29 (3Ah) R/W AGC MINIMUM SIGNAL ATTENUATION
CONFIGURATION REGISTER ADDRESS 30 (3Ch) R/W CARRIER SENSE 2 SCALE FACTOR
CONFIGURATION REGISTER ADDRESS 28 (38h) R/W AGC LOW SAT ATTENUATOR
CONFIGURATION REGISTER 31 ADDRESS (3Eh) MANUAL TX POWER CONTROL
28
CONFIGURATION REGISTER ADDRESS 27 (36h) R/W AGC RF THRESHOLD
CONFIGURATION REGISTER 26 ADDRESS (34h) R/W AGC TEST MODES
HFA3861A