DBT PACKAGE

(TOP VIEW)

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TDAT

TEN

RF2

NPOR

RF3

VCC_CU

WDEEN

VBAT

VBATI

P3.6/A6

TCLK

RF1

VCL

AM_MOD

GND_AF

RSSI

WAKE

BUSY

EOBA

11

12

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14

P3.7/A7

P2.3/A3

P2.4/A4

P1.0

P1.1

30

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34

CLKA/M

P3.0/A5

P2.1/A1

P2.0/A0

RST

15

16

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P1.2

P1.3

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22

P1.4

P1.5

P1.6

NC

P1.7

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29

XIN

XOUT

23

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27

VSS_MSP

P2.5

VCC_MSP

NC

TEST

P2.2/A2

TMS37F128

SCBS878 – APRIL 2012

www.ti.com

DESCRIPTION

The Controller Remote Access Identification Device (CRAID) combines three functions in one device:

•

Low-power 16-bit microcontroller based on the MSP430F1232 core

•

3D wakeup receiver

•

DST80 immobilizer interface

With these three functions, it is ideally suited for state-of-the-art passive entry and passive start applications. The

low-power microcontroller MSP430™ core offers a 16-bit RISC architecture, 8KB program memory, and 17 user-

accessible I/O ports. The 3D low-frequency (LF) wakeup receiver offers high sensitivity to receive LF signals

between 120 kHz and 140 kHz and has several other features such as RSSI measurement and bidirectional LF

signaling.

The embedded DST80 immobilizer interface offers a high level of security through its hardware encryption

coprocessor and can also handle mutual authentication schemes. The immobilizer interface operates without

battery support. Power management features include battery charge and check as well as a battery backup

function allowing operation of all functions (including the microcontroller) with low or even no battery as long as

there is sufficient energy from the LF field.

The passive entry device manages the immobilizer communication, push-button interaction, and LF wake

reception. The special high-Q design achieves communication ranges up to 3 m for the passive entry link with

outstanding low standby current on the receiver side. The front end offers flexible configuration of two different

wake patterns lengths of 0, 4, 8, or 16 bits. Each channel can be adjusted in sensitivity and resonance

frequency, which results in reproducible system designs. By sensing the pressing of a push button, the device

wakes up and controls an external UHF transmitter or transceiver. Security keys and rolling codes can be stored

in the integrated EEPROM memory. This memory is accessible over the LF interface without support from the

battery in the keyfob. The passive entry device offers a special battery backup mode to operate the

microcontroller without battery support. The external resonant circuit with an LF coil and a resonant capacitor can

be trimmed to the correct resonant frequency with the integrated trimming capability, eliminating part tolerances.

ORDERABLE PART NUMBER

–40°C to 85°C

TSSOP – DBT

TMS37F128D3IDBTRG4

(1)

For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI

web site at www.ti.com.

(2)

Package drawings, thermal data, and symbolization are available at www.ti.com/packaging.

2

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Copyright © 2012, Texas Instruments Incorporated

Product Folder Link(s): TMS37F128