RF31 Hope Microelectronics co., Ltd, RF31 Datasheet - Page 13

• Manufacturer Part Number: RF31
• Description: Rf31 Ism Receiver
• Manufacturer: Hope Microelectronics co., Ltd

2.1. Operating Modes
The RF31 provides several modes of operation which can be used to optimize the power consumption of the
device application. Depending upon the system communication protocol, the optimal trade-off between the radio
wake time and power consumption can be achieved.
Table 8 summarizes the modes of operation of the RF31. In general, any given mode of operation 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 the Shutdown mode, all can be dynamically selected by sending the
appropriate commands over the SPI in order to optimize the average current consumption. 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 affecting the current consumption. The SPI circuit block includes the SPI interface and the register
space. The 32 kHz OSC circuit block includes the 32.768 kHz RC oscillator or 32.768 kHz crystal oscillator, and
wake-up timer. AUX (Auxiliary Blocks) includes the temperature sensor, general purpose ADC, and low-battery
detector.
Shutdown
Standby
Sleep
Sensor
Ready
Tuning
Receive
Name
Mode
Tel: [phone]
(Register contents retained)
(Register contents lost)
Digital LDO
OFF
ON
Fax: [phone]
Table 8. Operating Modes
OFF
ON
ON
ON
ON
ON
ON
Circuit Blocks
SPI
E-mail: [e-mail]
OFF
OFF
ON
X
X
X
X
SPI
OSC AUX
32 kHz
OFF
OFF
ON
X
X
X
X
30 MHz
XTAL
OFF
OFF
OFF
OFF
ON
ON
ON
http://www.hoperf.com
OFF
OFF
OFF
OFF
OFF
ON
ON
PLL
R F 3 1
OFF
OFF
OFF
OFF
OFF
OFF
ON
RX
10 nA
400 nA
800 nA
1 μA
600 μA
9.5 mA
18.5 mA
I
VDD
13