ISL5416 Datasheet, PDF (46/71 Pages) Intersil Corporation – Four-Channel Wideband Programmable DownConverter

ISL5416
P(31:0)
15:0
TABLE 46. µP ATTENUATOR CONTROL ACCUMULATOR LOAD (IWA = 0*19h) RESET STATE = 0x00000000h
FUNCTION
ATTENUATOR LOAD VALUE.
uP loading of attenuator control. MSB = 24 dB, next-MSB = 12 dB, etc. Only top three bits are used to address the look-up table.
TABLE 47. µP ATTENUATOR CONTROL ACCUMULATOR LOAD STROBE (IWA = 0*1Ah) RESET STATE = INACTIVE
P(31:0)
FUNCTION
N/A A write to this location generates a one-clock-wide strobe that transfers the µP attenuator control register preload from IWA = 0*19h
to the accumulator. The transfer can also be caused by a SYNCInX signal (see IWA = 0*05h)
TABLE 48. µP ATTENUATOR CONTROL ACCUMULATOR READ STROBE (IWA = 0*1Bh) RESET STATE = INACTIVE
P(31:0)
FUNCTION
N/A A write to this location generates a one-clock-wide strobe that transfers the contents of the attenuator control accumulator to a holding
register to stabilize it for uP reading. The transfer can also be caused by a SYNCInX signal (see IWA = 0*05h). MSB = 48 dB (always
zero).
NOTE: 0x8000h is written to IWA = 0*19h is read 0x4000 here.
P(31:0)
N/A
TABLE 49. µP RANGE CONTROL STATUS READ STROBE (IWA = 0*1Ch) RESET STATE = INACTIVE
FUNCTION
A write to this location generates a one-clock-wide strobe that transfers the contents of the range control (averaging) accumulator
after normalization to a holding register to stabilize it for uP reading.
bit 16 - 1 = Immediate threshold crossed since last read.
15:0 - Integrated magnitude after normalization (comparison value for average magnitude thresholds).
P(31:0)
N/A
TABLE 50. µP RANGE CONTROL DC OFFSET READ STROBE (IWA = 0*1Dh) RESET STATE = INACTIVE
FUNCTION
A write to this location generates a one-clock-wide strobe that transfers the contents of the range control DC offset filter accumulator
to a holding register to stabilize it for uP reading.
21:0 - Signed DC offset value +/- 0.25 * FULL SCALE (input) range.
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