MVME1600-001 Base Board Preparation
1-8
1
General-Purpose Software-Readable Header (J8)
Header J8 provides eight readable jumpers. These jumpers can be read as
a register at ISA I/O address $80000801. Bit 0 is associated with header
pins 1 and 2; bit 7 is associated with pins 15 and 16. The bit values are read
as a zero when the jumper is installed, and as a one when the jumper is
removed. The PowerPC firmware (PPCBug) reserves the four lower-order
bits, SRH3 to SRH0. They are defined as shown in the list below:
The four higher-order bits, SRH4 to SRH7, are user-definable. They can
be allocated as necessary to specific applications. The MVME1600-001 is
shipped from the factory with J8 set to all zeros (jumpers on all pins).
Low-Order Bit
Pins
Definition
Bit #0 (SRH0)
1—2
Reserved for future use.
Bit #1 (SRH1)
3—4
With the jumper installed between pins 3 and 4
(factory configuration), the debugger uses the
current user setup/operation parameters in
NVRAM. When the jumper is removed (making
the bit a 1), the debugger uses the default
setup/operation parameters in ROM instead. Refer
to the ENV command description in Chapter 6 for
the ROM defaults.
Bit #2 (SRH2)
5—6
Reserved for future use.
Bit #3 (SRH3)
7—8
Reserved for future use.
J8
2
SRH7
SRH6
SRH5
SRH1
SRH4
SRH3
SRH2
16
15
1
SRH0
USER-DEFINABLE
USER-DEFINABLE
USER-DEFINABLE
SETUP PARAMETER SOURCE (IN=NVRAM; OUT=ROM)
USER-DEFINABLE
RESERVED FOR FUTURE USE
RESERVED FOR FUTURE USE
RESERVED FOR FUTURE USE
PPCBug INSTALLED
8
7
Содержание MVME1603
Страница 1: ...MVME1603 MVME1604 Single Board Computer Installation and Use V1600 1A IH4 ...
Страница 14: ...xiv ...
Страница 156: ...Using the Debugger 5 8 5 ...
Страница 176: ...ENV Set Environment 6 20 6 ...
Страница 190: ...EMC Compliance B 4 B ...
Страница 200: ...Proper Grounding C 10 C ...
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