EM2420 ETC [List of Unclassifed Manufacturers], EM2420 Datasheet - Page 79

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

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
Ember Part Number: 120-0049-000C
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
-
EM2420 Datasheet
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
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.
EM2420
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