Si1000/1/2/3/4/5
23.1. EZRadioPRO Operating Modes
The EZRadioPRO transceivers provide several operating modes which can be used to optimize the power
consumption for a given application. Depending upon the system communication protocol, an optimal
trade-off between the radio wake time and power consumption can be achieved.
Table 23.1 summarizes the operating modes of the EZRadioPRO transceivers. In general, any given oper-
ating mode may be classified as an active mode or a power saving mode. The table indicates which
block(s) are enabled (active) in each corresponding mode. With the exception of the SHUTDOWN mode,
all can be dynamically selected by sending the appropriate commands over the SPI. An “X” in any cell
means that, in the given mode of operation, that block can be independently programmed to be either ON
or OFF, without noticeably impacting the current consumption. The SPI circuit block includes the SPI inter-
face hardware and the device register space. The 32 kHz OSC block includes the 32.768 kHz RC oscilla-
tor or 32.768 kHz crystal oscillator and wake-up timer. AUX (Auxiliary Blocks) includes the temperature
sensor, general purpose ADC, and low-battery detector.
Table 23.1. EZRadioPRO Operating Modes
Mode
Name
Circuit Blocks
32 kHz OSC AUX
Digital LDO
SPI
30 MHz
XTAL
PLL
PA
RX
I
VDD
SHUT-
DOWN
OFF (Regis-
ter contents
lost)
OFF
OFF
OFF
OFF
OFF
OFF OFF
15 nA
STANDBY ON (Register
ON
ON
ON
ON
ON
ON
OFF
ON
X
OFF
X
OFF
OFF
OFF
ON
OFF
OFF
OFF
OFF
ON
OFF OFF 450 nA
contents
retained)
SLEEP
OFF OFF
OFF OFF
1 µA
1 µA
SENSOR
READY
ON
X
X
OFF OFF 600 µA
OFF OFF 8.5 mA
TUNING
X
X
ON
TRANS-
MIT
X
X
ON
ON
ON
OFF 30 mA*
RECEIVE
ON
X
X
ON
ON
OFF
ON 18.5 mA
Note: Using Si1002/3 at +13 dBm using recommended reference design. These power modes are for the
EZRadioPRO peripheral only and are independent of the MCU power modes.
240
Rev. 1.0
SILICON [ SILICON ]
