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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)： | 79/89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 79 of 89
FSTST0 (0x27) - Frequency Synthesizer Test Register 0
Bit
Field Name
Reset
R/W
Description
15:12
-
0
W0
Reserved, write as 0
11
VCO_ARRAY_SETTLE_LONG
0
R/W
When '1' this control bit doubles the time allowed for VCO
settling during VCO calibration.
10
VCO_ARRAY_OE
0
R/W
VCO array manual override enable.
9:5
VCO_ARRAY_O[4:0]
16
R/W
VCO array override value.
4:0
VCO_ARRAY_RES[4:0]
-
R
The resulting VCO array setting from the last calibration.
FSTST1 (0x28) - Frequency Synthesizer Test Register 1
Bit
Field Name
Reset
R/W
Description
15
VCO_TX_NOCAL
0
R/W
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
14
VCO_ARRAY_CAL_LONG
1
R/W
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
13:10
VCO_CURRENT_REF[3:0]
4
R/W
The value of the reference current calibrated against during VCO
calibration.
9:4
VCO_CURRENT_K[5:0]
0
R/W
VCO current calibration constant. (current B override value when
FSTST2.VCO_CURRENT_OE=1.)
3
VC_DAC_EN
0
R/W
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)
2:0
VC_DAC_VAL[2:0]
2
R/W
VC DAC output value
FSTST2 (0x29) - Frequency Synthesizer Test Register 2
Bit
Field Name
Reset
R/W
Description
15
-
0
W0
Reserved, write as 0.
14:13
VCO_CURCAL_SPEED[1:0]
0
R/W
VCO current calibration speed:
0: Normal
1: Double speed
2: Half speed
3: Undefined.
12
VCO_CURRENT_OE
0
R/W
VCO current manual override enable.
11:6
VCO_CURRENT_O[5:0]
24
R/W
VCO current override value (current A).
5:0
VCO_CURRENT_RES[5:0]
-
R
The resulting VCO current setting from last calibration.
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