Motorola MSC8101 ADS User's Guide Page 56

  • Download
  • Add to my manuals
  • Print
  • Page
    / 346
  • Table of contents
  • BOOKMARKS
  • Rated. / 5. Based on customer reviews
Page view 55
2-4 MSC8101 User’s Guide
Reset Configuration and Boot
Six bits map the MSC8101 clocks to one of 64 configuration mode options. Each option
determines the
CLKIN, PowerPC system bus, SC140 core, and CPM frequency ratios. The
six bits comprise three dedicated pins (
MOSCK[1-3]) and three bits from the reset
configuration word (MODCK_H). For information on clock configuration modes and
examples, see the clocks chapter in the MSC8101 Reference Manual.
2.2 Configuring a Single MSC8101
This section describes the configuration for a system that consists of a single MSC8101
and external memories. The input clock operates at 10 MHz, and the required system
clocks are the CPM clock at 150 MHz, the PowerPC system bus clock at 100 MHz, and
the SC140 core clock at 300 MHz. There are three possible ways to apply the hard reset
configuration word in such a system.
The MSC8101 is a reset configuration master and reads its own reset configuration
word from EPROM.
The MSC8101 is a reset configuration slave and the system has no boot EPROM.
The default configuration is used, and the system does not access the boot EPROM.
2.2.1 Master Mode With EPROM
In the configuration described in Figure 2-2 and Table 2-1, the MSC8101 works as a reset
configuration master and reads its own reset configuration word from external EPROM.
The MSC8101 performs the first part of the reset configuration process described in
Section 2.3.1, Reset Configuration Sequence.
.
Figure 2-2. Configuring a Single Device From EPROM
Configuration Master
PORESET
PORESET
Boot EPROM
EPROM Control Signals
HPE, RSTCONF
D[0–31]
D[0–7]
A[0–31]
A[..]
HRESET
VCC
Address Bus
Data Bus
MSC8101
CS0
CS
Page view 55
1 2 ... 51 52 53 54 55 56 57 58 59 60 61 ... 345 346

Comments to this Manuals

No comments