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
www.ti.com
SLOU186F–AUGUST 2006–REVISED AUGUST 2010
3 Physical Characteristics
3.1 Terminal Functions
Figure 3-1. TRF796x Pin Assignments (Top View)
Table 3-1. Terminal Functions
TERMINAL
TYPE
(1)
DESCRIPTION
NAME NO.
VDD_A 1 OUT Internal regulated supply (2.7 V – 3.4 V) for analog circuitry
VIN 2 SUP External supply input to chip (2.7 V – 5.5 V)
VDD_RF 3 OUT Internal regulated supply (2.7 V – 5 V), normally connected to VDD_PA (pin 4)
VDD_PA 4 INP Supply for PA; normally connected externally to VDD_RF (pin 3)
TX_OUT 5 OUT RF output (selectable output power, 100 mW at 8 Ω or 200 mW at 4 Ω, with VDD = 5 V)
VSS_RF 6 SUP Negative supply for PA; normally connected to circuit ground
VSS_RX 7 SUP Negative supply for RX inputs; normally connected to circuit ground
RX_IN1 8 INP RX input, used for AM reception
RX_IN2 9 INP RX input, used for PM reception
VSS 10 SUP Chip substrate ground
BAND_GAP 11 OUT Band-gap voltage (1.6 V); internal analog voltage reference; must be ac-bypassed to ground.
Also can be configured to provide the received analog signal output (ANA_OUT)
ASK/OOK 12 BID
Direct mode, selection between ASK and OOK modulation (0 = ASK, 1 = OOK)
IRQ 13 OUT Interrupt request
MOD 14 INP Direct mode, external modulation input
VSS_A 15 SUP Negative supply for internal analog circuits; normally connected to circuit ground
Supply for I/O communications (1.8 V – 5.5 V). Should be connected to VIN for 5-V
VDD_I/O 16 SUP
communication, VDD_X for 3.3-V communication, or any other voltage from 1.8 V to 5.5 V.
I/O_0 17 BID I/O pin for parallel communication
I/O_1 18 BID I/O pin for parallel communication
I/O_2 19 BID I/O pin for parallel communication
I/O_3 20 BID I/O pin for parallel communication
I/O_4 21 BID I/O pin for parallel communication
(1) SUP = Supply, INP = Input, BID = Bi-directional, OUT = Output
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