Texas Instruments orporated TRF7960ATB User Manual
T E X A S I N S T R U M E N T S
R F I D SYSTEMS
S P E C I F I C A T I O N
TRF79x0ATB
NFC/HF RFID Reader Module
Users Guide/Application Note
PRINTED COPIES OF THIS SPECIFICATION
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VERIFY THEIR CORRECT REVISION BEFORE USE.
Originator:
Joshua Wyatt
Revision: 0
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TABLE OF CONTENTS PAGE
Purpose ................................................................................................................. 3
1.
2. Scope ..................................................................................................................... 3
3. References ............................................................................................................ 3
4. TRF79x0ATB Module Description ................................................................... 4
5. TRF79x0ATB Connections/Technical Details .................................................. 6
6. TRF79x0ATB Module Schematic ...................................................................... 7
7. MSP-EXP430F5438 Experimenters Board ...................................................... 8
8. DK-LM3S9B96-EM2-TRF7960R ARM Cortex M-3 Development Board . 10
9. Quick Start ........................................................................................................ 11
10. Base Application Firmware ............................................................................. 11
11. Platform Specific Details .................................................................................. 11
12. Mechanical/Physical Information .................................................................... 12
13. Antenna Tuning Details .................................................................................... 13
14. TRF79x0ATB Module Read Ranges ............................................................... 17
15. Revision History ................................................................................................ 18
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1. Purpose
This document is intended to provide direction for TRF7960A/-70A users who desire to
implement a 13.56MHz NFC/RFID reader solution using the TRF79x0A IC connected to a
Texas Instruments embedded microcontroller or microprocessor development platform.
Examples of such development platforms are: the MSP-EXP430F5438 board, MSPEXP430F5529 board, the ARM Cortex-M3/M4 based board, or any other TI embedded
microcontroller platform with the EM socket headers populated.
2. Scope
This document will cover TRF79x0ATB module as it relates to using the module for
evaluation and development purposes in conjunction with Texas Instruments Embedded
Development platforms. This manual does not cover the in-depth details of the TRF79x0A
NFC/RFID IC families, as those details are well documented in the data sheets for those parts,
along with app notes that can be found on the product pages (see hyperlinks in References
section below).
3. References
TRF7960A Product Page: http://www.ti.com/product/trf7960A
TRF7970A Product Page: http://www.ti.com/product/trf7970A
TRF7960A Full Data Sheet: http://www.ti.com/lit/gpn/trf7960a
TRF7970A Full Data Sheet: http://www.ti.com/lit/gpn/trf7970a
TRF7960ATB Schematic, BOM and Design files: http://www.ti.com/litv/zip/sloc221
MSP-EXP430F5438 Users Guide: http://www.ti.com/lit/pdf/slau263
LM3S9B96 DK Users Guide: http://www.ti.com/litv/pdf/spmu036d
TPS61222DCKT Product Page: http://www.ti.com/product/tps61222
TI ISO15693/ISO18000-3 Inlays/Tags Parametric Search:
o http://focus.ti.com/paramsearch/docs/parametricsearch.tsp?family=rfid§ionId=4
75&tabId=2102&familyId=1352
Samtec Header and Mate Information:
Smith Chart Simulation Tool (licensed copy): http://www.fritz.dellsperger.net/
o https://www.samtec.com/ProductInformation/TechnicalSpecifications/Overview.aspx?series=SFM
o https://www.samtec.com/ProductInformation/TechnicalSpecifications/Overview.aspx?series=TFM
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4. TRF79x0ATB Module(s) Description
The TRF79x0ATB Evaluation Modules are intended to allow the software application
developer to get familiar with the functionalities of either of the TRF79x0A MultiStandard Fully Integrated 13.56 MHz NFC/RFID reader ICs with the freedom to
develop on their Texas Instruments Embedded microcontroller development platform
of choice.
The TRF79x0ATB module is also intended to allow customer driven antenna tuning
with onboard coil and customer driven antenna form factor design.
The module is hard wired for SPI communications, supports Slave Select and
TRF79x0A Direct Mode 2 (default), Direct Mode 1 and Direct Mode 0 operations.
The user also has access to and full control over the TRF79x0A EN2 and EN lines,
allowing for design and development of ultra low power NFC/HF RFID systems.
The module has an onboard boost converter (TPS61222DCKT) which boosts
+3.3VDC in to +5VDC out to TRF79x0A IC for +23dBm (full transmitter power out)
operations.
An impedance matching circuit from 4Ω to 50Ω is populated on the module and this
is connected to a tuned 50Ω antenna circuit which consists of onboard four turn coil
with series and parallel passive elements (capacitors and a resistor).
Test points are available on the board for checking firmware operations with
oscilloscope or logic analyzer, impedance matching and for attaching external antenna.
Connection to Texas Instruments Microcontroller platforms are made via Samtec EM
headers located on the underside of the board (Connectors P1/RF1 and P2/RF2).
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Figure 1: TRF7960ATB Evaluation Module
Figure 2: TRF7970ATB Evaluation Module
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5. TRF79x0ATB Connections/Technical Details
Connector P1/RF1
Pin # Signal Name Description
1 GND Ground
2 n/c
3 MOD Direct mode, external modulation input
4 n/c
5 n/c
6 n/c
7 IRQ Interrupt request (from TRF79x0A to MCU)
8 n/c
9 SYS_CLK
10 EN Chip enable input (If EN = 0, then chip is in power-down mode).
11 n/c
12 EN2
13 n/c
14
15 n/c
16 DATA_CLK Data Clock Input for MCU Communication (from MCU)
17 n/c
18 MOSI I/O_7, Master Out, Slave In (Data In from MCU)
19 GND Ground
20 MISO I/O_6, Master In, Slave Out (Data Out from TRF7960)
SLAVE
SELECT
Pulse enable and selection of power down mode. If EN2 is connected to VIN, then
VDD_X is active during power down to support the MCU. Pin can also be used for
If EN = 0 and EN2 = 1, then system clock is set to 60 kHz
Clock for MCU (optional)
pulse wake-up from power-down mode.
Slave Select, I/O_4 (Active Low)
Connector P2/RF2
Pin # Signal Name Description
1 n/c
2 n/c
3 n/c
4 n/c
5 n/c
6 n/c
7 +3.3VDC IN +VDC in (to TPS61222DCKT for generation of +5VDC)
8 n/c
9 +3.3VDC IN +VDC in (to TPS61222DCKT for generation of +5VDC)
10 n/c
11 n/c
12 n/c
13 n/c
14 n/c
15 n/c
16 n/c
17 n/c
18 ASK/OOK
19 n/c
20 n/c
Direct mode, selection between ASK and OOK modulation (0 = ASK, 1 = OOK)
Also can be configured to provide the received analog signal output (ANA_OUT)
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6. TRF79x0ATB Module Schematic
Note:
This schematic drives two separate layouts.
(TRF7960ATB.brd and TRF7970ATB.brd) the only difference is the bottom side silkscreen.
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7. MSP-EXP430F5438 Experimenters Board
The MSP430F5438 Experimenter Board (MSP-EXP430F5438) is a development
platform for the latest generation MSP430 MCUs. It features a 100-pin socket which
supports the MSP430F5438 (datasheet) and other devices with similar pinouts. The
socket allows for quick upgrades to newer devices or quick applications changes. It is
also compatible with many TI low-power RF wireless evaluation modules such as the
CC2520EMK and the TRF79x0ATB module discussed here in this document.
The Experimenter Board helps designers quickly learn and develop using the new
F5xx MCUs, which provide the industry’s lowest active power consumption, more
memory and leading integration for applications such as energy harvesting, wireless
sensing and automatic metering infrastructure (AMI).
A TI Flash Emulation Tool, like the MSP-FET430UIF, is required to program and
debug the MSP430 devices on the experimenter board.
The TRF79x0ATB module plugs into the RF1 and RF2 headers on this MSP-EXP
board (see Figure 3). For logic analyzer connection during firmware debug, user can
use test points on TRF79x0ATB board or pins on header RF3.
RF3 Debug
Header
TRF79x0ATB
module
connects here
Figure 3: MSP-EXP430F5438 Development Board
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