System Considerations - Motorola MCPN750A Installation And Use Manual

Hardware Preparation and Installation
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System Considerations

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The MCPN750A is designed to operate as a CompactPCI non-system slot
board. Consequently, the MCPN750A must be installed in the subrack
system slot marked with the circle symbol.
The MCPN750A can operate properly, with or without a system slot
controller board. In the standard operating mode (with a system slot
board), the system slot board is used to provide clock and arbitration
signals to the MCPN750A. In the stand-alone mode, a jumper must be set
on the MCPN750A, in order to obtain clock signals from other on-board
devices.
Installing a jumper on J8 routes an onboard PCI clock to the 21554 primary
side clock input. This allows the MCPN750A to operate in a chassis
without a system slot controller board installed. The chassis must provide
+5V, +3.3V, +12V, -12V and VIO to the MCPN750A, and the BD_SEL
pin (P1-D15) in the chassis must be grounded. In addition, in the stand-
alone mode, the MCPN750A cannot communicate over the CompactPCI
backplane.
On the MCPN750A baseboard, the standard serial console port (
serves as the PPCBug debugger 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 MCPN750A 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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