Texas Instruments 3138 155 232931 AGCTST0 0x24 AGC Test Register, AGCTST1 0x25 AGC Test Register

				CC2420
AGCTST0 (0x24) - AGC Test Register 0
Bit	Field Name	Reset	R/W	Description
15:12	LNAMIX_HYST[3:0]	3	R/W	Hysteresis on the switching between different RF front-end
				gain modes, defined in 2 dB steps
11:6	LNAMIX_THR_H[5:0]	25	R/W	Threshold for switching between medium and high RF front-
				end gain mode, defined in 2 dB steps
5:0	LNAMIX_THR_L[5:0]	9	R/W	Threshold for switching between low and medium RF front-end
				gain mode, defined in 2 dB steps
AGCTST1 (0x25) - AGC Test Register 1
Bit	Field Name	Reset	R/W	Description
15	-	0	W0	Reserved, write as 0
14	AGC_BLANK_MODE	0	R/W	Set the VGA blanking mode when switching out a gain stage
				When VGA_GAIN_OE = 0:
				0 : Blanking is performed when the AGC algorithm switches
				out one or more 14dB gain stages.
				1 : Blanking is never performed.
				When VGA_GAIN_OE = 1:
				Blanking is performed when AGC_BLANK_MODE=1
13	PEAKDET_CUR_BOOST	0	R/W	Doubles the bias current in the peak-detectors in-between the
				VGA stages when set.
12:11	AGC_SETTLE_WAIT[1:0]	1	R/W	Timing for AGC to wait for analog gain to settle.
10:8	AGC_PEAK_DET_MODE	0	R/W	Sets the AGC mode for use of the VGA peak detectors:
	[2:0]			Bit 2 : Digital ADC peak detector enable / disable
				Bit 1 : Analog fixed stages peak detector enable /
				disable
				Bit 0 : Analog variable gain stage peak detector enable /
				disable
7:6	AGC_WIN_SIZE[1:0]	1	R/W	Window size for the accumulate and dump function in the
				AGC.
				0 : 8 samples
				1 : 16 samples
				2 : 32 samples
				3 : 64 samples
5:0	AGC_REF[5:0]	20	R/W	Target value for the AGC control loop, given in 2 dB steps.
				Reset value corresponds to approximately 25% of the ADC
				dynamic range in reception.
AGCTST2 (0x26) - AGC Test Register 2
Bit	Field Name	Reset	R/W	Description
15:10	-	0	W0	Reserved, write as 0
9:5	MED2HIGHGAIN[4:0]	9	R/W	MED2HIGHGAIN sets the difference in the receiver
				LNA/MIXER gain from medium gain mode to high gain mode,
				used by the AGC for setting the correct front-end gain mode.
4:0	LOW2MEDGAIN[4:0]	10	R/W	LOW2MEDGAIN sets the difference in the receiver
				LNA/MIXER gain from low gain mode to medium gain mode,
				used by the AGC for setting the correct front-end gain mode.

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