CC2420 Chipcon AS, CC2420 Datasheet - Page 66

• Manufacturer Part Number: CC2420
• Description: 2.4 GHz RF Transceiver for IEEE 802.15.4 and ZigBee
• Manufacturer: Chipcon AS

RXCTRL1 (0x17) - Receive control register 1
15:14
13
12
11
10
9
8
7:6
5:4
3:2
1:0
Chipcon AS SmartRF ® CC2420 Preliminary Datasheet (rev 1.0), 2003-11-17
Bit
Field Name
-
RXBPF_LOCUR
RXBPF_MIDCUR
LOW_LOWGAIN
MED_LOWGAIN
HIGH_HGM
MED_HGM
LNA_CAP_ARRAY[1:0]
RXMIX_TAIL[1:0]
RXMIX_VCM[1:0]
RXMIX_CURRENT[1:0]
Reset
0
0
0
1
0
1
0
1
1
1
2
W0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
SmartRF
Description
Reserved, write as 0.
Controls reference bias current to RX bandpass filters:
0: 4 uA (Default)
1: 3 uA
Controls reference bias current to RX bandpass filters:
0: 4 uA (Default)
1: 3.5 uA
LNA low gain mode setting in AGC low gain mode.
LNA low gain mode setting in AGC medium gain mode.
RX Mixers high gain mode setting in AGC high gain mode.
RX Mixers high gain mode setting in AGC medium gain mode.
Selects varactor array setting in the LNA
0: OFF
1: 0.1pF (x2) (Nominal)
2: 0.2pF (x2)
3: 0.3pF (x2)
Control of the receiver mixers output current.
0: 12 µA
1: 16 µA (Nominal)
2: 20 µA
3: 24 µA
Controls VCM level in the mixer feedback loop
0: 8 µA mixer current
1: 12 µA mixer current (Nominal)
2: 16 µA mixer current
3: 20 µA mixer current
Controls current in the mixer
0: 360 µA mixer current (x2)
1: 720 µA mixer current (x2)
2: 900 µA mixer current (x2) (Nominal)
3: 1260 µA mixer current (x2)
®
CC2420
Page 66 of 85