MC33690 查看數據表（PDF） - Motorola => Freescale

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MC33690

Standalone Tag Reader Circuit

Motorola => Freescale 

Freescale SMeCm33i6c9o0nductor, Inc.

COMMUNICATION MODES DESCRIPTION

The STARC offers 3 different communication

modes. Therefore it can be used as a standalone

circuit connected to an Electronic Control Unit

(ECU) through a bus line or it can be directly

connected to a microcontroller in case of a single

board architecture.

Table 1. Communication modes description

Configuration

Type

Bus type

Name

Configuration

pins

Mode1 Mode2

Pin status

& function description

K output/input :

- demodulator output,

1 wire

(VBAT)

A

0

0

- amplitude modulation input

- shutdown/wake-up

AM must be connected to VSUP

Standalone

DOUT forces a low level

K output :

- demodulator output

2 wires

(VBAT)

B

0

1

AM input :

- amplitude modulation input,

- shutdown/wake-up

DOUT forces a low level

DOUT output :

- demodulator output

x

AM input :

- amplitude modulation input

MODE2 input :

Direct

connection

to a MCU

2 wires

(VDD)

C

1

- shutdown/wake-up

K output/input (standalone ISO 9141 inter-

1

face) :

- driven by Tx and monitored by Rx

K input (standalone ISO 9141 interface) :

0

- monitored by Rx

-Tx disabled

© Motorola, Inc., 2002.

FMoOr TMOoRrOeLAInSfoEMrmICaOtNioDnUCOTnORTShPisROPDroUdCuTSct,

Go to: www9.freescale.com

revision 4.8, 5 February 2002

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