Functional Description
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1
Similarly, the VMEchip2 provides an input signal and a control bit to initiate
a local reset operation. By setting a control bit, software can maintain a board
in a reset state, disabling a faulty board from participating in normal system
operation. The local reset driver is enabled even when the VMEchip2 is not
the system controller. A local reset may be generated by the RESET switch,
a power-up reset, a watchdog timeout, a VMEbus SYSRESET*, or by a
control bit in the global control/status register (GCSR).
Front Panel Indicators
There are four LEDs on the MVME162LX front panel:
FAIL
,
RUN
,
SCON
,
and
FUSES
.
❏
FAIL
LED (red). Lights when the BRDFAIL* signal line is active or
when the processor is halted. Part of DS1.
❏
RUN
LED (green or amber). Lights when the local bus TIP* signal
line is low. This indicates one of the local bus masters is executing
a local bus cycle. Part of DS1.
❏
SCON
LED (green). Lights when the VMEchip2 in the
MVME162LX is the VMEbus system controller. Part of DS2.
❏
FUSES
LED (green). Lights when +5 Vdc, +12 Vdc, and -12 Vdc
power is available to the LAN, IP, and SCSI interfaces. Part of DS2.
Data Bus Structure
The local bus on the MVME162LX Embedded Controller is a 32-bit
synchronous bus that is based on the MC68040 bus, and supports burst
transfers and snooping. The various local bus master and slave devices use
the local bus to communicate. The local bus is arbitrated by priority type
arbiter and the priority of the local bus masters from highest to lowest is:
82596CA LAN, 53C710 SCSI, VMEbus, and MPU. In the general case,
any master can access any slave; however, not all combinations pass the
common sense test. Refer to the MVME162LX Embedded Controller
Programmer’s Reference Guide to determine its port size, data bus
connection, and any restrictions that apply when accessing the device.
Содержание MVME162LX 200 Series
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Страница 66: ...1 52 Computer Group Literature Center Web Site Board Level Hardware Description 1 ...
Страница 84: ...2 18 Computer Group Literature Center Web Site Hardware Preparation and Installation 2 ...
Страница 108: ...3 24 Computer Group Literature Center Web Site Debugger General Information 3 ...
Страница 156: ...IOT Command Parameters for Supported Floppy Types B 6 Computer Group Literature Center Web Site B ...
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Страница 164: ...Ethernet Interconnections E 2 Computer Group Literature Center Web Site E ...
Страница 200: ...J 4 Computer Group Literature Center Web Site J ...
Страница 208: ...Index IN 8 Computer Group Literature Center Web Site I N D E X ...