Irq & Mapping Configuration Register Tab; Figure 21: Rssi Window; Table 1: Continuous Mode Dio Mappings - Semtech SX1231SKB User Manual

(which should not be confused with the LNA or AGC threshold) can be calculated from and equates to the
effective noise floor of the receiver for a given filter bandwidth.
= − +
RSSIthres [ 174 NF
5.4 Irq & Mapping Configuration Register Tab
The Irq & Mapping Configuration Register Tab is illustrated in Figure 22. Please refer to the SX1231 for a
full description of the irq and mappings for each mode of operation of the SX1231.
Configuration register value entries can be selected from the drop down menus besides each DIO listed.
Note that when necessary the GUI will automatically re-configure DIO mappings (i.e. Packet Handler
operation).
Please refer to Table 1 and Table 2, below, for the available DIO mappings of the SX1231 in continuous
and packet mode, respectively.
Mode DIOx
Mapping
00
01
Sleep
10
11
00
01
Standby
10
11
00
01
FS
10
11
00
01
RX
10
11
00
01
TX
10
11
Revision 2.0 – July 2010
© Semtech 2010
+ +
10 * log( 2 * RxBw )

Figure 21: RSSI Window

DIO5 DIO4
- -
- -
LowBat LowBat
ModeReady -
ClkOut -
- -
LowBat LowBat
ModeReady -
ClkOut -
- -
LowBat LowBat
ModeRady PllLock
ClkOut Timeout
Rssi RxReady
LowBat SyncAddr
ModeReady PllLock
ClkOut TxReady
ClkOut TxReady
LowBat LowBat
ModeReady PllLock

Table 1: Continuous Mode DIO Mappings

Page 17 of 24
DemodSNR ] dBm
DIO3 DIO2
- -
- -
AutoMode -
- -
- -
- -
AutoMode -
- -
- -
- -
AutoMode -
- -
Rssi Data
RxReady Data
AutoMode Data
Timeout Data
TxReady Data
TxReady Data
AutoMode Data
TxReady Data
SX1231-31SKB
USER GUIDE
DIO1 DIO0
- -
- -
LowBat LowBat
- ModeReady
- -
- -
- LowBat
LowBat ModeReady
- PllLock
- -
LowBat LowBat
PllLock ModeReady
Dclk SyncAddr
RxReady Timeout
LowBat Rssi
SyncAddr ModeReady
Dclk Plllock
LowBat TxReady
LowBat LowBat
PllLock ModeReady
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