RFM219SW Datasheet, PDF (21/35 Pages) List of Unclassifed Manufacturers – Wireless Alarm and Security Systems

RFM219SW
STBY State
The crystal oscillator is turned on. The frequency synthesizer and RF front-end are turned off. The FIFO contents retain in the
STBY state. If the sleep timer is turned on, after the sleep timer timeout the chip is automatically switched to the STBY state and
waits for the MCU’s commands. It takes the time defined by the “Xtal Stabilizing Time” on the RFPDK for the device to switch
from the SLEEP state to the STBY state. The power consumption is about 520 uA in the STBY state.
TUNE State
The frequency synthesizer (PLL) is tuned and locked to the desired frequency. The RF front-end is turned off. The FIFO contents
retain in the TUNE state. It takes about 300 us to switch from the STBY state to the TUNE state. The power consumption is about
2 mA in the TUNE state.
RX State
All the blocks are turned on. The chip will receive the incoming signals, output the demodulated data from the GPO pin which is
configured as DOUT or perform the data decoding and buffering with the packet handler and the FIFO. The power consumption
of the RX state depends on the frequency band and the demodulation methods. It only takes about 20 us to switch from the
TUNE state to the RX state.
EEPROM State
This state is designed for the user to get access to the User Space of the EEPROM. The User Space is a 32-byte free space that
allows the users to store their own information. The User Space is independent from the Configuration Space which is used to
store all the parameters downloaded from the RFPDK. The details about how to get access to the User Space can be found in
the” AN136 Accessing the RFM219SW EEPROM”.
5.8 GPOs and Interrupts
Four General Purpose Outputs (GPOs) are available to use.
Table 13. General Purpose Outputs
Pin Name I/O
Function
13 GPO1 O Programmable output, options are: nRSTO (default), INT1, INT2 and DOUT
12 GPO2 O Programmable output, options are: INT1 (default), INT2 and DCLK
9 GPO3 O Programmable output, options are: CLKO (default), INT1, INT2 and DOUT
8 GPO4 O Programmable output, options are: DOUT (default), INT1, INT2 and DCLK
The nRSTO and the CLKO are respectively the POR and clock output to drive the external MCU. They are designed to lower the
system application BOM. The DOUT is the demodulated data output and the DCLK is the sync clock output.
The INT1 and INT2 are the two interrupt outputs which response to multiple sources, as listed in table below.
Interrupts
RSSI_VLD
PREAM_VLD
SYNC_PS
NODE_PS
CRC_PS
PKT_DONE
SL_TMO
Table 14. Interrupt Sources
Descriptions
The RSSI valid interrupt
The preamble detection interrupt
The sync word detection interrupt
The node ID detection interrupt in packet mode
The CRC validation successful interrupt in packet mode
The packet receiving done interrupt in packet mode
The sleep timer timeout interrupt
Clearing Methods
By External MCU
By External MCU
By External MCU
By External MCU
By External MCU
By External MCU
By External MCU
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