Zilog EZ80F91 Manuel d'utilisateur télécharger pdf (Page 38)

eZ80F91 Development Kit

User Manual

UM014220-0508 eZ80 Development Kit

Data Carrier Detect

The Data Carrier Detect (DCD) signal at D1 indicates that a good carrier

signal is being received from the remote modem.

The RX signal at D2 indicates that data is received from the modem.

Data Terminal Ready

The Data Terminal Ready (DTR) signal at D3 informs the modem that the

PC is ready.

The TX signal at D4 indicates that data is transmitted to the modem.

Push Buttons

The eZ80Acclaim!

Development Kit provides user controls in the form

of push buttons. These push buttons serve as input devices to the eZ80F91

device. You can use them as necessary for application development. All

push buttons are connected to the GPIO Port B pins.

PB0

The PB0 push button switch, SW1, is connected to bit 0 of GPIO Port B.

This switch can be used as the port input if required.

PB1

The PB1 push button switch, SW2, is connected to bit 1 of GPIO Port B.

This switch can be used as the port input if required.

PB2

The PB2 push button switch, SW3, is connected to bit 2 of GPIO Port B.

This switch can be used as the port input if required.

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Zilog EZ80F91 Manuel d'utilisateur Page 38