Motorola MC68328 Technical Information PDF herunterladen (Seite 18)

2-6

FLEX Alphanumeric Chip MC68175 Interface

Hardware Development

FLEX Development Kit

assert the READY line low until the end of the 32-bit transfer. As an example, this

pin is connected to the IRQ6 pin on the Dragonball ADS board.

• SCK (JP4 Header, Pin 3) is the clock supplied by the host MPU. This input pin is

connected to SPI Clock output pin on the host ADS.

•SS

(JP4 Header, Pin 6) is used as FLEX chip select. Before every data transfer

between FLEX Alphanumeric Chip and the host MPU, the host MPU needs to

assert SS

low to select the FLEX Alphanumeric Chip IC. This pin is connected to a

configured general purpose port on the host microprocessor (e.g., Port J Pin 4).

• MISO (JP4 Header, Pin 5) is the line on which data from the FLEX Alphanumeric

Chip is transferred to the host.

• MOSI (JP4 Header, Pin 4) is the line on which data from the host is transferred to

the FLEX Alphanumeric Chip IC.

• EVCC (JP4 Header, Pin 20) and GND (Emulator Pin 22) lines are the power

supply from the host MPU (+ 5 V).

• Vcc (JP4 Header, Pin 26) is the 3.3 V power supply. This is the voltage supply for

the FLEX Alphanumeric Chip and the 2-bit Floating Audio-to-Digital converter

chip.

2.1.5 Additional Information

For a more complete description of the FLEX Development Board and the Dragonball

MC68328 ADS board, please refer to the corresponding User’s Manuals.

Contact your local Motorola sales office for more information on the FLEX one-way

pager solution.

The example code presented in this application report is available via the Motorola

website, reached at the following address:

http://www.motorola-dsp.com/documentation/appnotes

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 18