ISL3873BIK Intersil, ISL3873BIK Datasheet - Page 35

• Manufacturer Part Number: ISL3873BIK
• Manufacturer: Intersil

Specifications of ISL3873BIK

• Lead Free Status / RoHS Status: Supplier Unconfirmed

Bits 6:4
Bit 3
Bit 2
Bit 1
Bit 0
Bit 7
Bits 6:0
Bits 7:4
Bits 3:0
Bit 7:6
Bit 5:0
Bits 7:4
Bits 3:0
Bits 7:5
Bits 4:0
Bits 7:5
Bit 4:0
Bits 7,6
I/Q DAC input control. This DAC gives an analog look at various internal digital signals that are suitable for analog
representation.
000 = normal (TX filter).
001 = down converter output.
010 = E/L integrator - upper 6 bits of the TCHIPacc on (Q) and zeros on (I).
011 = I/ Q A/D’s.
100 = Bigger picker output. Upper 6 bits of FWT_I winner and FWT_Q winner.
101 = CMF weights - upper 6 bits of all 16 CMF weights are circularly shifted with full scale negative sync pulse interleaved
between them.
110 = Test Bus pins (5:0) when configured as inputs, CR32(4), ((5:0) to both I and Q inputs).
111 = Barker Correlator/ low rate samples - as selected by bit 7 CR32.
Enable test bus into RX and TX DAC (if below bit 2 is 0).
0 = normal.
1 = enable.
Enable RF A/D into RX DAC.
0 = normal.
1 = enable.
VRbit1.
VRbit0.
R/W but not currently used internally, should be set to zero to ensure compatibility with future revisions.
AGC gain clip (7-bit value, 0-127) this is the attenuator accumulator upper limit. The lower limit is 0.
AGC mid Saturation counts (0-15 range) these are the counts to kick in the low and mid attenuator steps (CR28).
AGC low Saturation Count (0-15 range).
R/W but not currently used internally, should be set to zero to ensure compatibility with future revisions.
RXRF_AGC pad value to use in the RSSI calculation, Range 0 - 63dB (nominally 30dB).
AGC high saturation attenuation value (0-30).
Note: hi saturation attenuation step actual value is programmed value times 2. This attenuation step will occur if the # of I and
Q sats is greater than hi saturation count.
AGC hi sat count (0-15 range).
CW detector scale multiplication factor. (xxxx.x). See CR35 and CR 49.
Set to 00h for forcing CW detect always active.
Set to 0Fh for forcing CW detector always inactive.
AGC Lock-in level (0-7.5 range). Note this is the inner lock window.
AGC max lock count for antenna search. The number of updates required to lock AGC must be less than or equal to this count
for antenna diversity search to be allowed to run. Range 0 to 7.
AGC Lock Window positive side (0-15.5 range). Note: this is the outer lock window.
R/W but not currently used internally, should be set to zero to ensure compatibility with future revisions.
CONFIGURATION REGISTER 14 ADDRESS (1Ch) R/W A/D TEST MODES 3 (Continued)
CONFIGURATION REGISTER 16 ADDRESS (20h) R/W AGC SATURATION COUNTS
CONFIGURATION REGISTER 20 ADDRESS (28h) R/W AGC LOCK WINDOW POS.
35
CONFIGURATION REGISTER 19 ADDRESS (26h) R/W AGC LOCK IN LEVEL
CONFIGURATION REGISTER 17 ADDRESS (22h) R/W AGC RF PAD VALUE
CONFIGURATION REGISTER 15 ADDRESS (1Eh) R/W AGC GAIN CLIP
CONFIGURATION REGISTER 21 ADDRESS (2Ah) R/W AGC BACKOFF
CONFIGURATION REGISTER 18 ADDRESS (24h) R/W AGC HI SAT
ISL3873B