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參數(shù)資料
| 型號： | EM2420TR |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | 2.4 GHz IEEE 802.15.4 / ZigBee RF Transceiver |
| 中文描述： | 2.4 GHz IEEE 802.15.4標準/ ZigBee的射頻收發(fā)器 |
| 文件頁數(shù)： | 78/89頁 |
| 文件大?。?/td> | 1758K |
| 代理商： | EM2420TR |
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EM2420
Ember Part Number: 120-0049-000
C
EM2420 Datasheet
Page 78 of 89
Bit
Field Name
Reset
R/W
Description
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 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
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
[2:0]
0
R/W
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
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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