Motorola MVME2700 Series Servisní příručka stáhnout pdf (Strana 83)

System Considerations

http://www.motorola.com/computer/literature 1-63

In MVME761 I/O mode, the MVME2700 supplies SCSI terminator power

through a polyswitch (resettable fuse) located on the P2 adapter board.

The MVME2700 supplies a

SPEAKER_OUT signal to the 14-pin combined

LED-mezzanine/remote-reset connector, J1. When J1 is used as a remote

reset connector with the LED mezzanine removed, the

SPEAKER_OUT

signal can be cabled to an external speaker. For the pin assignments of J1,

refer to Table 4-1.

On the MVME2700 series VME module, the standard serial console port

COM1, accessible through the transition module, serves as the firmware

console port. The firmware console should be set up as follows:

❏ Eight bits per character

❏ One stop bit per character

❏ Parity disabled (no parity)

❏ Baud rate of 9600 baud

9600 baud is the power-up default for serial ports on MVME2700 boards.

After power-up you can reconfigure the baud rate if you wish, using the

PPCBug PF (Port Format) command via the command line interface.

Whatever the baud rate, some type of hardware handshaking — either

XON/OFF or via the RTS/CTS line — is desirable if the system supports

it.

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Motorola MVME2700 Series Servisní příručka Strana 83