EM2420 ETC [List of Unclassifed Manufacturers], EM2420 Datasheet - Page 78

• Manufacturer Part Number: EM2420
• Description: 2.4 GHz IEEE 802.15.4 / ZigBee RF Transceiver
• Manufacturer: ETC [List of Unclassifed Manufacturers]

Bit
AGCTST1 (0x25) - AGC Test Register 1
Bit
15
14
13
12:11
10:8
7:6
5:0
AGCTST2 (0x26) - AGC Test Register 2
Bit
15:10
9:5
4:0
Ember Part Number: 120-0049-000C
Field Name
Field Name
-
AGC_BLANK_MODE
PEAKDET_CUR_BOOST
AGC_SETTLE_WAIT[1:0]
AGC_PEAK_DET_MODE
[2:0]
AGC_WIN_SIZE[1:0]
AGC_REF[5:0]
Field Name
-
MED2HIGHGAIN[4:0]
LOW2MEDGAIN[4:0]
Reset
Reset
0
0
0
1
0
1
20
Reset
0
9
10
EM2420 Datasheet
R/W
R/W
W0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
W0
R/W
R/W
Description
gain mode, defined in 2 dB steps
Description
Reserved, write as 0
Set the VGA blanking mode when switching out a gainstage
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
Doubles the bias current in the peak detectors in between the
VGA stages when set.
Timing for AGC to wait for analog gain to settle.
Sets the AGC mode for use of the VGA peak detectors:
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
Window size for the accumulate and dump function in the
AGC.
0 : 8 samples
1 : 16 samples
2 : 32 samples
3 : 64 samples
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.
Description
Reserved, write as 0
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.
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.
EM2420
Page 78 of 89