Motorola MCPN750A, IH5 manual System Considerations

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Hardware Preparation and Installation

System Considerations

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 (COM1) 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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