SM1211E915TOPIC Semtech, SM1211E915TOPIC Datasheet - Page 61

• Manufacturer Part Number: SM1211E915TOPIC
• Description: KIT PICTAIL EXT FOR SX1211
• Manufacturer: Semtech
• Type: Transceiver, UHFr

Specifications of SM1211E915TOPIC

• Frequency: 915MHz
• For Use With/related Products: SX1211
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Rev 7 – Sept 2
ADVANCED COMMUNICATIONS & SENSING
Fifo_fill
Tx_done
Tx_start_irq_0
Res
RSSI_irq
PLL_locked
PLL_lock_en
RSSI_irq_thresh
nd
, 2008
6
5
4
3
2
1
0
7-0
14
14
14
14
14
14
14
15
r/w/
c
r
r/w
r/w
r/w/
c
r/w/
c
r/w
0
1
FIFO filling status/control (Buffered mode only):
Goes high when FIFO is being filled (sync word has been detected)
Writing ‘1’ clears the bit and waits for a new sync word (if Fifo_overrun_clr=0)
0
1
Tx_done IRQ source
Goes high when the last bit has left the shift register.
Tx start condition and IRQ_0 source:
0
1
0
equal to the threshold set by MCParam_Fifo_thresh parameter (Cf section
5.2.2.3), IRQ_0 mapped to Fifo_threshold (d)
1
(d): “0”, should be set to “1”.
Note: “0” disables the RSSI IRQ source. It can be left enabled at any time, and
the user can choose to map this interrupt to IRQ0/IRQ1 or not.
RSSI IRQ source:
Goes high when a signal above RSSI_irq_thresh is detected
Writing ‘1’ clears the bit
PLL status:
0
1
Writing a ‘1’ clears the bit
PLL_lock detect flag mapped to pin 23:
0
1
RSSI threshold for interrupt (coded as RSSI)
(d): “00000000”
If Fifo_fill_method = ‘0’: (d)
If Fifo_fill_method = ‘1’:
If Data_mode(1:0) = 01 (Buffered mode):
If Data_mode(1:0) = 1x (Packet mode):
Automatically starts when a sync word is detected (d)
Manually controlled by Fifo_fill
Stop filling the FIFO
Start filling the FIFO
Tx starts if FIFO is full, IRQ_0 mapped to /Fifoempty (d)
Tx starts if FIFO is not empty, IRQ_0 mapped to /Fifoempty
Tx starts if FIFO is not empty, IRQ_0 mapped to /Fifoempty
not locked
locked
Lock detect disabled, pin 23 is High-Z
Lock detect enabled(d)
Start transmission when the number of bytes in FIFO is greater than or
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