Motorola MTX series Programmer's Reference Guide

2-34 Computer Group Literature Center Web Site
Raven PCI Host Bridge & Multi-Processor Interrupt Controller
2
MSADD3, MSOFF3, and MSATT3 represent the only register group
which can be used to initiate access to the PCI Configuration Address
($80000CF8) and Configuration Data ($80000CFC) registers. Note that
this implies that MSxxx3 also represents the generation of PCI Special
Cycles. The power up default values of MSADD3, MSOFF3, and
MSATT3 are set to allow access to PCI configuration space without PPC
register initialization. Please see the description of the following registers
for additional information.
To initiate a PCI cycle from the PPC bus, the PPC address must be greater
than or equal to the START field and less than or equal to the END field.
START Start Address. This field determines the start address of a
particular memory area on the PPC bus which will be used to access PCI
bus resources. The value of this field will be compared with the upper 16
bits of the incoming PPC address.
END End Address. This field determines the end address of a particular
memory area on the PPC bus which will be used to access PCI bus
resources. The value of this field will be compared with the upper 16 bits
of the incoming PPC address.
PPC Slave Offset/Attribute (0,1 and 2) Registers
Address MSOFF0/MSATT0 - $FEFF0044
MSOFF1/MSATT1 - $FEFF004C
MSOFF2/MSATT2 - $FEFF0054
Bit
0123456789
1
0
1
1
1
2
1
3
1
4
1
5
1
6
1
7
1
8
1
9
2
0
2
1
2
2
2
3
2
4
2
5
2
6
2
7
2
8
2
9
3
0
3
1
Name MSOFFx MSATTx
REN WEN WPEN MEM IOM
Operation R/W R
R/W R/W R R/W R R R/W R/W
Reset $0000 $00
0 0 0 0 0 0 0 0

Motorola MTX series Specifications

General

Brand	Motorola
Model	MTX series
Category	Portable Radio
Language	English