User's Manual
Table Of Contents
- 1 Introduction
- Table of Contents
- 2 Description (continued)
- 3 Physical Characteristics
- 4 ELECTRICAL SPECIFICATIONS
- 5 System Description
- 5.1 Power Supplies
- 5.2 Receiver – Analog Section
- 5.3 Register Descriptions
- 5.4 Direct Commands From MCU to Reader
- 5.4.1 Command Codes
- 5.4.2 Reset
- 5.4.3 Transmission With CRC
- 5.4.4 Transmission Without CRC
- 5.4.5 Delayed Transmission With CRC
- 5.4.6 Delayed Transmission Without CRC
- 5.4.7 Transmission Next Slot
- 5.4.8 Receiver Gain Adjust
- 5.4.9 Test External RF (RSSI at RX input with TX OFF)
- 5.4.10 Test Internal RF (RSSI at RX input with TX ON)
- 5.4.11 Block Receiver
- 5.4.12 Enable Receiver
- 5.5 Reader Communication Interface
- 5.6 Parallel Interface Communication
- 5.7 Serial Interface Communication
- 5.8 External Power Amplifier Application
TRF7960
TRF7961
SLOU186F–AUGUST 2006–REVISED AUGUST 2010
www.ti.com
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 Comments
B7 Unused
B6 Oscok Crystal oscillator stable indicator
B5 rssi_x2 RSSI value of auxiliary channel (4 dB Auxiliary channel is by default PM. It can be set to AM with B3 of chip state
per step) MSB control register (00).
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 Active channel is default AM and can be set to PM with option bit B3 of chip
per step) MSB state control register (00).
B1 rssi_1
B0 rssi_0 RSSI value of active channel (4 dB
per step) LSB
32 System Description Copyright © 2006–2010, Texas Instruments Incorporated
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