EM2420-STR Ember, EM2420-STR Datasheet - Page 63

• Manufacturer Part Number: EM2420-STR
• Description: IC RF TXRX ZIGBEE 2.4GHZ 48-QLP
• Manufacturer: Ember

Specifications of EM2420-STR

• Mfg Application Notes: EM2420
• Frequency: 2.4GHz
• Data Rate - Maximum: 250kbps
• Modulation Or Protocol: 802.15.4
• Applications: ZigBee™
• Power - Output: -3dBm
• Sensitivity: -94dBm
• Voltage - Supply: 2.1 V ~ 3.6 V
• Current - Receiving: 19.7mA
• Current - Transmitting: 17.4mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 48-QLP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Memory Size: -

SYNCWORD (0x14) - Sync Word
15:0
TXCTRL (0x15) - Transmit Control Register
15:14
13
12:11
10:9
8:6
5
4:0
Ember Part Number: 120-0049-000D
Bit
Bit
Field Name
SYNCWORD[15:0]
Field Name
TXMIXBUF_CUR[1:0]
TX_TURNAROUND
TXMIX_CAP_ARRAY[1:0]
TXMIX_CURRENT[1:0]
PA_CURRENT[2:0]
-
PA_LEVEL[4:0]
Reset
0xA70F
Reset
2
1
0
0
3
1
31
EM2420 Datasheet
R/W
R/W
R/W
R/W
R/W
R/W
W1
R/W
R/W
R/W
Description
TX mixer buffer bias current.
0: 690uA
1: 980uA
2: 1.16mA (nominal)
3: 1.44mA
Sets the wait time after STXON before transmission is started.
0 : 8 symbol periods (128 us)
1 : 12 symbol periods (192 us)
Selects varactor array settings in the transmit mixers.
Transmit mixers current:
0: 1.72 mA
1: 1.88 mA
2: 2.05 mA
3: 2.21 mA
Current programming of the PA
0: -3 current adjustment
1: -2 current adjustment
2: -1 current adjustment
3: Nominal setting
4: +1 current adjustment
5: +2 current adjustment
6: +3 current adjustment
7: +4 current adjustment
Reserved, write as 1.
Output PA level. (~0 dBm)
Description
Synchronization word. The SYNCWORD is processed from the
least significant nibble (F at reset) to the most significant nibble
(A at reset).
SYNCWORD is used both during modulation (where 0xF’s are
replaced with 0x0’s) and during demodulation (where 0xF’s are
not required for frame synchronization). In reception an implicit
zero is required before the first symbol required by SYNCWORD.
The reset value is compliant with IEEE 802.15.4.
EM2420
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