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| 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(biāo)準(zhǔn)/ ZigBee的射頻收發(fā)器 |
| 文件頁數(shù)： | 77/89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 77 of 89
MANOR (0x22) - Manual signal OR override register
Bit
Field Name
Reset
R/W
Description
15
VGA_RESET_N
0
R/W
The
VGA_RESET_N
signal is used to reset the peak detectors in
the VGA in the RX chain.
14
BIAS_PD
0
R/W
Global Bias power down (1)
13
BALUN_CTRL
0
R/W
The
BALUN_CTRL
signal controls whether the PA should receive
its required external biasing (1) or not (0) by controlling the
RX/TX output switch.
12
RXTX
0
R/W
RXTX signal: controls whether the LO buffers (0) or PA buffers
(1) should be used.
11
PRE_PD
0
R/W
Powerdown of prescaler.
10
PA_N_PD
0
R/W
Powerdown of PA (negative path).
9
PA_P_PD
0
R/W
Powerdown of PA (positive path). When
PA_N_PD
=1 and
PA_P_PD=1 the up-conversion mixers are in powerdown.
8
DAC_LPF_PD
0
R/W
Powerdown of TX DACs.
7
XOSC16M_PD
0
6
RXBPF_CAL_PD
0
R/W
Powerdown control of complex bandpass receive filter calibration
oscillator.
5
CHP_PD
0
R/W
Powerdown control of charge pump.
4
FS_PD
0
R/W
Powerdown control of VCO, I/Q generator, LO buffers.
3
ADC_PD
0
R/W
Powerdown control of the ADCs.
2
VGA_PD
0
R/W
Powerdown control of the VGA.
1
RXBPF_PD
0
R/W
Powerdown control of complex bandpass receive filter.
0
LNAMIX_PD
0
R/W
Powerdown control of LNA, down-conversion mixers and front-
end bias.
AGCCTRL (0x23) - AGC Control
Bit
Field Name
Reset
R/W
Description
15:12
-
0
W0
Reserved, write as 0
11
VGA_GAIN_OE
0
R/W
Use the
VGA_GAIN
value during RX instead of the AGC value.
10:4
VGA_GAIN [6:0]
0x7F
R/W
When written, VGA manual gain override value; when read, the
currently used VGA gain setting.
3:2
LNAMIX_GAINMODE_O
[1:0]
0
R/W
LNA / Mixer Gain mode override setting
1 : Gain mode is always low-gain
2 : Gain mode is always med-gain
3 : Gain mode is always high-gain
1:0
LNAMIX_GAINMODE
[1:0]
0
R
Status bit, defining the currently selected gainmode selected by
the AGC or overridden by the
LNAMIX_GAINMODE_O
setting.
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
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