EM2420-STR Ember, EM2420-STR Datasheet - Page 66

• 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: -

FSCTRL (0x18) - Frequency Synthesizer Control and Status
15:14
13
12
11
10
9:0
Ember Part Number: 120-0049-000D
Bit
Field Name
LOCK_THR[1:0]
CAL_DONE
CAL_RUNNING
LOCK_LENGTH
LOCK_STATUS
FREQ[9:0]
Reset
1
0
0
0
0
357
(2405
MHz)
EM2420 Datasheet
R/W
R/W
R
R
R/W
R
R/W
Description
Number of consecutive reference clock periods with successful
synchronization windows required to indicate lock:
0: 64
1: 128 (recommended)
2: 256
3: 512
Calibration has been performed since the last time the frequency
synthesizer was turned on.
Calibration status, '1' when calibration in progress and ‘0’
otherwise.
Synchronization window pulse width:
0: 2 prescaler clock periods (recommended)
1: 4 prescaler clock periods
Frequency synthesizer lock status:
0 : Frequency synthesizer is out of lock
1 : Frequency synthesizer is in lock
Frequency control word, controlling the RF operating frequency
F
F
F
See the Frequency and Channel Programming section on page
47 for further information.
C
C
C
. In transmit mode, the local oscillator (LO) frequency equals
. In receive mode, the LO frequency is 2 MHz below F
= 2048 + FREQ[9:0] MHz
EM2420
Page 66 of 84
C
.