AT86RF232 Atmel Corporation, AT86RF232 Datasheet - Page 24

• Manufacturer Part Number: AT86RF232
• Manufacturer: Atmel Corporation

Specifications of AT86RF232

• Max. Operating Frequency: 0 MHz
• Crypto Engine: AES
• Operating Voltage (vcc): 1.8 to 3.6
• Frequency Band: 2.4 GHz
• Max Data Rate (mb/s): 0.25
• Antenna Diversity: Yes
• External Pa Control: Yes
• Power Output (dbm): 3
• Receiver Sensitivity (dbm): -100
• Receive Current Consumption (ma): 11.8
• Transmit Current Consumption (ma): 13.8
• Link Budget (dbm): 103

6.5 Sleep/Wake-up and Transmit Signal (SLP_TR)
Table 6-9. SLP_TR Multi-functional Pin.
Figure 6-20. Sleep and Wake-up Initiated by Asynchronous Microcontroller Timer.
24
Transceiver Status
PLL_ON
TX_ARET_ON
TRX_OFF
SLEEP
CLKM
SLP_TR
AT86RF232
t
TR3
Function
TX start
TX start
Sleep
Wakeup
(35 CLKM clock cycles)
Pin 11 (SLP_TR) is a multi-functional pin. Its function relates to the current state of the
Atmel AT86RF232 and is summarized in
explained in detail in
In states PLL_ON and TX_ARET_ON, pin 11 (SLP_TR) is used as trigger input to
initiate a TX transaction. Here SLP_TR is sensitive on rising edge only.
After initiating a state change by a rising edge at pin 11 (SLP_TR) in radio transceiver
state TRX_OFF, the radio transceiver remains in the new state as long as the pin is
logical high and returns to the preceding state with the falling edge.
SLEEP state
The SLEEP state is used when radio transceiver functionality is not required, and thus
the AT86RF232 can be powered down to reduce the overall power consumption.
A power-down scenario is shown in
TRX_OFF state the microcontroller forces the AT86RF232 to SLEEP by setting
SLP_TR = H. If pin 17 (CLKM) provides a clock to the microcontroller this clock is
switched off after 35 CLKM cycles. The AT86RF232 awakes when the microcontroller
releases pin 11 (SLP_TR).
The CLKM clock frequency setting for 62.5kHz are not intended to directly clock the
microcontroller. When using these clock rates, CLKM is turned off immediately when
entering SLEEP state.
Note:
Transition Description
L  H
L  H
L  H
H  L
1.
Timing figures t
Starts frame transmission
Starts TX_ARET transaction
Takes the radio transceiver into SLEEP state, CLKM disabled
Takes the radio transceiver back into TRX_OFF state, level sensitive
Chapter
TR3
7.
and t
CLKM off
TR1a
Figure
refer to
Table
Table
6-20. When the radio transceiver is in
6-9. The radio transceiver states are
7-1.
t
TR1a
async timer elapses
(microcontroller)
8321A–MCU Wireless–10/11