Block Diagram
1-25
1
Software-Programmable Hardware Interrupts
Eight software-programmable hardware interrupts are provided
by the VMEchip2. These interrupts allow software to create a
hardware interrupt. Refer to the VMEchip2 description in the
MVME162LX Embedded Controller Programmer’s Reference Guide for
detailed programming information.
Local Bus Timeout
The MVME162LX provides a timeout function in the VMEchip2
and the MC2chip for the local bus. When the timer is enabled and a
local bus access times out, a Transfer Error Acknowledge (TEA)
signal is sent to the local bus master. The timeout value is software-
selectable for 8
µ
sec, 64
µ
sec, 256
µ
sec, or infinity. The local bus
timer does not operate during VMEbus bound cycles. VMEbus
bound cycles are timed by the VMEbus access timer and the
VMEbus global timer. Refer to the VMEchip2 and the MC2chip
descriptions in the MVME162LX Embedded Controller Programmer’s
Reference Guide for detailed programming information.
The MC2chip also provides local bus timeout logic for
MVME162LXs without the optional VMEbus interface (i.e., without
the VMEchip2 ASIC).
The access timer logic is duplicated in the VMEchip2 and MC2chip
ASICs. Because the local bus timer in the VMEchip2 can detect an
offboard access and the MC2chip local bus timer cannot, the timer
in the VMEchip2 is used in all cases except for the version of the
MVME162LX which does not include the VMEbus interface
(described under ‘‘No-VMEbus-Interface option”).
Содержание 700 Series
Страница 2: ......
Страница 3: ...700 800 Series MVME162LX Embedded Controller Installation and Use V162 7A IH1 ...
Страница 48: ...1 34 Board Level Hardware Description 1 ...
Страница 70: ...2 22 Hardware Preparation and Installation 2 ...
Страница 138: ...A 18 Configure and Environment Commands A ...
Страница 144: ...B 6 Disk Tape Controller Data B ...
Страница 146: ...C 2 Network Controller Data C ...
Страница 156: ...Index IN 6 I N D E X W watchdog timer 1 24 Z Z85230 serial communications controllers SCCs 3 6 ...