isl3873b Intersil Corporation, isl3873b Datasheet - Page 36

• Manufacturer Part Number: isl3873b
• Description: Wireless Integrated Medium Access Controller With Baseband Processor
• Manufacturer: Intersil Corporation

Bits 5:0
Bits 7,6
Bits 5
Bits 4:0
Bits 7
Bits 6:0
Bits 7
Bit 6:0
Bits 7
Bits 6:0
Bits 7
Bit 6
Bit 5
Bits 3:4
Bit 2
Bit 1
Bit 0
Bit 7
Bits 6:0
AGC Backoff (xxxxx.x, 0-31.5 range) in half dB steps. This sets the operating headroom in the I and Q ADCs.
R/W but not currently used internally, should be set to zero to ensure compatibility with future revisions.
AGC Look up table read control bit.
1 = Read AGC table at address given below.
0 = Read contents of CR23.
AGC lookup table address (32 address bits).
R/W but not currently used internally, should be set to zero to ensure compatibility with future revisions.
AGC look up table data, unsigned.
R/W but not currently used internally, should be set to zero to ensure compatibility with future revisions.
AGC loop gain (0.xxxx - x.00000, 0 - 1.0000 range), nominally 0.7.
AGC RX_RF, This input drives the RX-RF control if AGC override Enable is set to 1.
When Polarity bit (CR26[6]) is zero:
1 = removes 30dB pad.
0 = inserts 30dB pad.
AGC RX_IF, This CR is input to RF-IF DAC if AGC override Enable (CR 26[2]) is set to 1.
AGC continuous update.
0 = disable, no updates during AGC freeze.
1 = allow updates during freeze AGC and AGC_lock.
See also CR17[7].
rxRFAGC polarity control.
0 = normal.
1 = invert.
AGC extra update disable. Allows final 32 sample update tweak after AGC_lock is declared.
0 = enable an extra update.
1 = disable extra update.
R/W but not currently used internally, should be set to zero to ensure compatibility with future revisions.
AGC override Enable.
0 = normal, disabled.
1 = enabled, CR25 controls receiver gain in both RF and IF via RXRF_AGC and RXIF_AGC lines.
AGC 2nd antenna power abort.
0 = AGC lock on 2nd antenna is required to finish antenna dwell.
1 = abort 2nd antenna lock search immediately if power is lower on 2nd antenna than on 1st antenna.
AGC Sat Step disable if within CR29[7:5] window.
0 = disable sat step.
1 = enable sat step.
RXRF AGC disable.
0 = normal.
1 = disables threshold.
RF AGC threshold (0-64 range). The RxRf_Agc pad is removed if the AGC voltage falls below this threshold.
CONFIGURATION REGISTER 22 ADDRESS (2Ch) R/W AGC LOOKUP TABLE ADDRESS
36
CONFIGURATION REGISTER ADDRESS 27 (36h) R/W AGC RF THRESHOLD
CONFIGURATION REGISTER 25 ADDRESS (32h) R/W AGC RX_IF AND RF
CONFIGURATION REGISTER 23 ADDRESS (2Eh) R/W AGC TABLE DATA
CONFIGURATION REGISTER 26 ADDRESS (34h) R/W AGC TEST MODES
CONFIGURATION REGISTER 24 ADDRESS (30h) R/W AGC LOOP GAIN
CONFIGURATION REGISTER 21 ADDRESS (2Ah) R/W AGC BACKOFF
ISL3873B