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2-4

FLEX Alphanumeric Chip MC68175 Interface

Hardware Development

FLEX Development Kit

Motorola Semiconductor Products Sector has a complete FLEX one-way pager

solution, as described in

Figure 2-1

, including the FLEX Alphanumeric Chip

MC68175, receivers, the MC68328 microprocessor, and LCD panels. For evaluating

and prototype purposes, the FDB can also receive an audio signal directly injected (to

the BNC connector) from different types of signal encoders, such as the Hewlett

Packard 8648A RF signal generator. For over-the-air communication, the receiver end

of the FDB can interface with various types of receivers. A receiver connector is

available on the FDB as a “plug-in” solution.

2.1.2 FLEX Development/Receiver Board Interface

Figure 2-2

briefly describes the interface between the FLEX Development Board and

the Motorola FLEX Receiver Board. Pins 2 (A1), 3 (A2), and 10 (A0) should be

connected together to one of the receiver control lines for on/off cycling operation. In

the figure, those pins are connected to GND so that the receiver will be turned on at

all times. Pins 1, 4, 8, and 9 are not connected.

Figure 2-2

Motorola FLEX Receiver Connection Diagram

12345

67891011

GND

Audio

CLKINReceiver

Voltage

AA1419

Frees

cale Semiconductor,

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

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Motorola MC68328 Technical Information Seite 16