MRF89XAM8A datasheet(5/34 Pages) MICROCHIP

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Preliminary

DS70651A-page 3

MRF89XAM8A

1.0

DEVICE OVERVIEW

The MRF89XAM8A is an ultra-low power sub-GHz

surface mount transceiver module with integrated

crystal, internal voltage regulator, matching circuitry

and PCB antenna. The MRF89XAM8A module

operates in the European 863–870 MHz frequency

band and is ETSI compliant. The integrated module

design frees the integrator from the extensive RF and

antenna design, and regulatory compliance testing,

allowing quicker time to market.

The MRF89XAM8A module is compatible with

Microchip’s

MiWi™

Development

Environment

software stacks. The software stacks are available as a

free download, including source code, from the

Microchip’s web site

http://www.microchip.com/wireless.

The MRF89XAM8A module has been tested and

conforms to EN 300 220-2 V2.3.1 (2001–02) and EN

301 489-3 V1.4.1 (2002–08) European Standards. The

module tests can be applied toward final product

certification and Declaration of Conformity (DoC). To

maintain conformance, refer to module settings in

Section 1.3, Operation. Additional testing may be

required depending on the end application.

1.1

Interface description

The simplified block diagram of the MRF89XAM8A

module is illustrated in Figure 1-1. The module is based

on the Microchip Technology MRF89XA ultra-low

power sub-GHz transceiver Integrated Circuit (IC). The

module interfaces to many popular Microchip PIC®

microcontrollers through a 3-wire serial SPI interface,

two chip selects (configuration and data), two interrupts

Interrupt Request 0 (IRQ0) and Interrupt Request 1

(IRQ1), Reset, power and ground as illustrated in

Figure 1-2. Table 1-1 provides the related pin

descriptions.

Serial communication and module configuration are

documented in the “MRF89XA Ultra-Low Power,

Integrated Sub-GHz Transceiver” (DS70622) Data

Sheet. Refer to the “MRF89XA Data Sheet” for specific

serial

interface

protocol

and

general

definitions. Also, see Section 1.3, Operation for

specific register settings that are unique to the

MRF89XAM8A

module

operation

maintain

regulatory compliance.

FIGURE 1-1:

MRF89XAM8A BLOCK DIAGRAM

MRF89XA

Control

Interface

Power

Management

Baseband

MRF89XAM8A Module

SPI

Digital I/O

IRQ0

Power

12.8 MHz Crystal

Matching

Circuitry

and

SAW Filter

PCB

Antenna

Loop

Filter

VCO

Tank

IRQ1

CSDATA

CSCON

RESET

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