Motorola CPCI-6020 manual PMC 66 Mhz Disable Jumper, Remote Switch Connector

PMC 66 Mhz Disable Jumper Controls, LEDs, and Connectors

3.4.8PMC 66 Mhz Disable Jumper

A 0.1 inch, 2-pin header (J21) located on the CPCI-6020 disables 66 MHz operation on PCI Bus B if jumpered. When a jumper is installed between pins 1 and 2, the PCI Bus B operates at 33MHz, regardless of the PMC’s capability. This jumper setting prevents the secondary Ethernet controller from being disabled if a 66 MHz capable PMC is installed. The jumper pulls the M66EN signal low so the PMC knows the bus is running at 33 MHz.

Table 3-19 J21 PMC 66 MHz Disable Jumper

Pin

1

2

Signal

GND

M66EN

3.4.9Remote Switch Connector

A 0.1 inch, 3-pin header (J19) located on the CPCI-6020 can be used to extend the front panel's Reset and Abort switches functions through the cables to a remote location.

Table 3-20 J19 Remote Switch Connector

Pin

1

2

3

Signal

Abort

GND

Reset

3.4.10Flash Write Protect Enable Jumper

A 0.1 inch, 2-pin header (J20) located on the CPCI-6020 enables write protect of bank A flash. When a jumper is installed between pins 1 and 2, the flash cannot be written.

Table 3-21 J20 Flash Write Protect Enable Jumper

Pin

1

2

Signal

VPP

GND

CPCI-6020 CompactPCI Single Board Computer Installation and Use (6806800A51C) 73