Programming Details; Overview; Mc864Xd Reset Configuration; Table 4-1 Mc864Xd Por Configuration Settings - SMART Embedded Computing MVME7100ET Programmer's Reference Manual

Programming Details

4.1

Overview

This chapter includes additional programming information for the MVME7100ET.
4.2

MC864xD Reset Configuration

The MVME7100ET supports the power-on reset (POR) pin sampling method for processor
reset configuration. The states of the various configuration pins on the processor are
sampled when reset is deasserted to determine the desired operating modes.
Combinations of pull-up and pull-down resistors are used to set the options. Some options
are fixed and some are selectable at build time by installing the proper pull-up/pull-down
resistor. Each option and the corresponding default setting are described in the following
table. Refer to the MC864xD reference manual, listed in
Documentation on page 83
details and/or programming information.
Table 4-1
MC864xD
Signal
LA [28:31]
TSEC1_TXD[1]
MVME7100ET Single Board Computer Programmer's Reference (6806800K88C)
and Manufacturers' Documents on page 83
MC864xD POR Configuration Settings
Default
Select
POR
Option
Settings
Resistors 1000
Resistors 1
Appendix B, Related
Description State of Bit vs Function1
0000 16:1
0010 2:1
0011 3:1
MPX Clock PLL
0100 4:1
Ratio (MPX
0101 5:1
Clock: SYSCLK)
0110 6:1
1000 8:1
1001 9:1
Platform frequency of 400
0
MHz
Platform
Frequency
Platform frequency of
1
500MHz or greater
Chapter 4
for additional
49