EM2420-RTB Ember, EM2420-RTB Datasheet - Page 40

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

Specifications of EM2420-RTB

• Mfg Application Notes: EM2420
• Frequency: 2.4GHz
• Data Rate - Maximum: 250kbps
• Modulation Or Protocol: 802.15.4
• Applications: Home/Building Automation, 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: Lead free / RoHS Compliant
• Memory Size: -

Radio control state machine
The
that is used to switch between different
operation states (modes). The change of
state is done either by using command
strobes or by internal events such as SFD
detected in receive mode.
The radio control state machine states are
shown in Figure 23. The numbers in
brackets
readable in the FSMSTATE status register.
Reading the FSMSTATE status register is
primarily for test / debug purposes.
Before using the radio in either RX or TX
mode, the voltage regulator and crystal
oscillator must be turned on and become
stable. The voltage regulator and crystal
oscillator start-up times are given in the
Electrical Specifications section on page
8.
The crystal oscillator is controlled by
accessing the SXOSCON
command strobes. The XOSC16M_STABLE
bit in the status register returned during
address transfer indicates whether the
oscillator is running and stable (see Table
5). This status register can be polled when
waiting for the oscillator to start.
Ember Part Number: 120-0049-000D
EM2420
refer
has a built-in state machine
to
the
state
/ SXOSCOFF
number
EM2420 Datasheet
For
synthesizer (FS) can also be manually
calibrated and started by using the
STXCAL command strobe register. This
will not start a transmission before a
STXON command strobe is issued. This is
not shown in Figure 23.
Enabling transmission is done by issuing a
STXON or STXONCCA command strobe.
Turning off RF can be accomplished by
using one of the SRFOFF or SXOSCOFF
command strobe registers.
After reset the
mode. All configuration registers can then
be programmed in order to make the chip
ready to operate at the correct frequency
and mode. Due to the very fast start-up
time, the
Down until a transmission session is
requested.
As also described in the 4-wire Serial
Configuration and Data Interface section
on page 23, the crystal oscillator must be
running (IDLE mode) in order to have
access to the RAM and FIFOs.
test
EM2420
purposes,
EM2420
can remain in Power
is in Power Down
EM2420
the
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frequency