Harrier Power Up Configuration Header; Pmc 66 Mhz Disable; Enable/Disable +12 V And -12 V Use - Motorola CPCI-6020 Installation And Use Manual

Hardware Preparation and Installation
To enable Flash Bank A, place a jumper across pins 1 and 2 of header J24. To enable Flash
Bank B, place a jumper across pins 2 and 3 of header J24.
J24
1-2
2-3
2.8.2

Harrier Power Up Configuration Header

A 2 mm, 8-pin low profile header located on side 1 of the CPCI-6020 provides the means to
change some of the Harrier power up configuration settings. The pin assignments for this
header, along with the power up setting with the jumper on or off, are as follows (boards are
shipped with all jumpers off):
J22
1-2
3-4
5-6
7-8
2.8.3

PMC 66 MHz Disable

This 0.1 inch, 2-pin header (J21) located on the CPCI-6020 is used to disable 66 MHz
operation on PCI Bus B. When a jumper is installed between pins 1 and 2, PCI Bus B will
operate at 33 MHz regardless of whether the PMC is capable of 66 MHz. This 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 can be aware that the bus is operating at 33
MHz.
J21
GND
M66EN
2.8.4

Enable/Disable +12 V and -12 V Use

This 0.1 inch, 2-pin header (J18) located on the CPCI-6020 is used to disable +/-12 V on the
board.
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CPCI-6020 CompactPCI Single Board Computer Installation and Use (6806800A51C)
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Jumper On
Flash Bank A Enabled (32 MB, soldered)
Flash Bank B Enabled (1 MB, sockets)
Factory Configuration
Jumper On
PUST0 = 0
Harrier PUST Bit 0 in GCSR Register
PUST1 = 0
Harrier PUST Bit 1 in GCSR Register
PUST2 = 0
Harrier PUST Bit 2 in GCSR Register
PUST3 = 0
Harrier PUST Bit 2 in GCSR Register
Harrier Power Up Configuration Header
Jumper Off
PUST0 = 1
PUST1 = 1
PUST2 = 1
PUST3 = 1