AT86RF212-ZU Atmel, AT86RF212-ZU Datasheet - Page 24

• Manufacturer Part Number: AT86RF212-ZU
• Description: IC TXRX ZIGBE/802.15.4/ISM 32QFN
• Manufacturer: Atmel

Specifications of AT86RF212-ZU

• Frequency: 700MHz, 800MHz, 900MHz
• Data Rate - Maximum: 250kbps
• Modulation Or Protocol: 802.15.4 Zigbee, 6LoWPAN, ISM
• Applications: ISM, ZigBee™
• Power - Output: 10dBm
• Sensitivity: -110dBm
• Voltage - Supply: 1.8 V ~ 3.6 V
• Current - Receiving: 9.2mA
• Current - Transmitting: 25mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 32-VQFN Exposed Pad, 32-HVQFN, 32-SQFN, 32-DHVQFN
• Number Of Receivers: 1
• Number Of Transmitters: 1
• Wireless Frequency: 769 MHz to 935 MHz
• Interface Type: SPI
• Noise Figure: 7 dB
• Output Power: 21 dB
• Operating Supply Voltage: 1.8 V, 3 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Maximum Supply Current: 25 mA
• Minimum Operating Temperature: - 40 C
• Modulation: OQPSK
• Protocol Supported: 802.15.4
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Industrial
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Memory Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

SLEEP state
The SLEEP state is used when radio transceiver functionality is not required, and thus
the AT86RF212 can be powered down to reduce the overall power consumption.
A power-down scenario is shown in Figure 4-15. When the radio transceiver is in
TRX_OFF state, the microcontroller forces the AT86RF212 to SLEEP by setting
SLP_TR = H. If pin 17 (CLKM) provides a clock to the microcontroller, this clock is
switched off after 35 clock cycles. This enables a microcontroller in a synchronous
system to complete its power-down routine and prevent deadlock situations. The
AT86RF212 awakes when the microcontroller releases pin SLP_TR. This concept
provides the lowest possible power consumption.
The CLKM clock frequency settings for CLKM_CTRL values 6 and 7 are not intended to
directly clock the microcontroller. When using these clock rates, CLKM is turned off
immediately when entering SLEEP state.
Figure 4-15. Sleep and Wake-up Initiated by Asynchronous Microcontroller Timer
Note:
Timing figure t
refers to Table 5-1.
TR2
RX_ON and RX_AACK_ON states
For synchronous systems where CLKM is used as a microcontroller clock source and
the SPI master clock (SCLK) is directly derived from CLKM, the AT86RF212 supports
an additional power-down mode for receive operating states (RX_ON and
RX_AACK_ON).
If an incoming frame is expected and no other applications are running on the
microcontroller, it can be powered down without missing incoming frames. This can be
achieved by a rising edge on pin SLP_TR that turns CLKM off. Then the radio
transceiver state changes from RX_ON or RX_AACK_ON (Extended Operating Mode)
to RX_ON_NOCLK or RX_AACK_ON_NOCLK, respectively. In case that a frame is
received (e.g. indicated by an IRQ_2 (RX_START) interrupt), the clock output CLKM is
automatically switched on again. This scenario is shown in Figure 4-16. In RX_ON
state, the clock at pin 17 (CLKM) is switched off after 35 clock cycles when setting the
pin SLP_TR = H.
The CLKM clock frequency settings for CLKM_CTRL values 6 and 7 are not intended to
directly clock the microcontroller. When using these clock rates, CLKM is turned off
immediately when entering RX_ON_NOCLK or RX_AACK_ON_NOCLK.
In states RX_(AACK)_ON_NOCLK and RX_(AACK)_ON, the radio transceiver current
consumptions
are equivalent.
However,
the RX_(AACK)_ON_NOCLK current
consumption is reduced by the current required for driving pin 17 (CLKM).
AT86RF212
24
8168C-MCU Wireless-02/10