CC2420 Chipcon AS, CC2420 Datasheet - Page 75

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

FSTST0 (0x27) - Frequency Synthesizer Test Register 0
15:12
11
10
9:5
4:0
FSTST1 (0x28) - Frequency Synthesizer Test Register 1
15
14
13:10
9:4
3
2:0
FSTST2 (0x29) - Frequency Synthesizer Test Register 2
15
14:13
12
11:6
5:0
Chipcon AS SmartRF ® CC2420 Preliminary Datasheet (rev 1.0), 2003-11-17
Bit
Bit
Bit
Field Name
-
VCO_ARRAY_SETTLE_LONG
VCO_ARRAY_OE
VCO_ARRAY_O[4:0]
VCO_ARRAY_RES[4:0]
Field Name
VCO_TX_NOCAL
VCO_ARRAY_CAL_LONG
VCO_CURRENT_REF[3:0]
VCO_CURRENT_K[5:0]
VC_DAC_EN
VC_DAC_VAL[2:0]
Field Name
-
VCO_CURCAL_SPEED[1:0]
VCO_CURRENT_OE
VCO_CURRENT_O[5:0]
VCO_CURRENT_RES[5:0]
Reset
0
0
0
16
-
Reset
0
1
4
0
0
2
Reset
0
0
0
24
-
R/W
W0
R/W
R/W
R/W
R
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
W0
R/W
R/W
R/W
R
SmartRF
Description
Reserved, write as 0
When '1' this control bit doubles the time allowed for VCO
settling during VCO calibration.
VCO array manual override enable.
VCO array override value.
The resulting VCO array setting from the last calibration.
Description
0 : VCO calibration is always performed when going to RX or
when going to TX.
1 : VCO calibration is only performed when going to RX or when
using the STXCAL command strobe
When ‘1’ this control bit doubles the time allowed for VCO
frequency measurements during VCO calibration.
0 : PLL Calibration time is 37 us
1 : PLL Calibration time is 57 us
The value of the reference current calibrated against during VCO
calibration.
VCO current calibration constant. (current B override value when
FSTST2.VCO_CURRENT_OE=1.)
Controls the source of the VCO VC node in normal operation
(PAMTST.VC_IN_TEST_EN=0):
0: Loop filter (closed loop PLL)
1: VC DAC (open loop PLL)
VC DAC output value
Description
Reserved, write as 0.
VCO current calibration speed:
0: Normal
1: Double speed
2: Half speed
3: Undefined.
VCO current manual override enable.
VCO current override value (current A).
The resulting VCO current setting from last calibration.
®
CC2420
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