Texas Instruments TRF7960 Manual page 32

Multi-standart fully integrated 13.56-mhz rfid analog front end and data-framing reader system
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TRF7960
TRF7961
SLOU186F – AUGUST 2006 – REVISED AUGUST 2010
Table 5-25. RSSI Levels and Oscillator Status Register (0Fh)
Displays the signal strength on both reception channels and RF amplitude during RF-off state
The RSSI values are valid from reception start till start of next transmission.
Bit
Bit Name
Function
B7
Unused
B6
Oscok
Crystal oscillator stable indicator
B5
rssi_x2
RSSI value of auxiliary channel (4 dB
per step) MSB
B4
rssi_x1
B3
rssi_x0
RSSI value of auxiliary channel (4 dB
per step) LSB
B2
rssi_2
RSSI value of active channel (4 dB
per step) MSB
B1
rssi_1
B0
rssi_0
RSSI value of active channel (4 dB
per step) LSB
32
System Description
Comments
Auxiliary channel is by default PM. It can be set to AM with B3 of chip state
control register (00).
Active channel is default AM and can be set to PM with option bit B3 of chip
state control register (00).
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