Use Of 68En360 Memory Controller; Use Of 68En360 Interrupt Controller - PEP VM162 User Manual

Chapter 2 Functional Description

2.4.2 Use of 68EN360 Memory Controller

Beside its main purpose which is to provide communication power to the VM162/VM172 the I/O con-
troller 68EN360 is also used for some system integration function. First of all this is DRAM control and
global memory decoding. Therefore, the 8 CS lines provided by the 68EN360 memory controller are
connected to the different memory types or address areas folllowing the scheme in the following Table.
Table 2.3: 68EN360 CS Line Connection
Note: In order to be compatible with the above configuration, the board initialization described in the
Programming Chapter must be closely adhered to.

2.4.3 Use of 68EN360 Interrupt Controller

The 68EN360 internal interrupt controller is one part of the VM162/VM172 interrupt control logic. The
68360 internal interrupt controller provides programmable interrupt vectors for all internal interrupt re-
quests. For detailled description of these interrupts, please refer to the 68EN360 User's Manual.
Additionally, some external signals are connected with 68EN360 dedicated interrupt inputs. Signals at
this inputs are processed by the 68EN360 to generate autovectored interrupt on fixed levels to the CPU.
These signal are summarized below:
Table 2.4: External Signal Connection
Juli 23, 1997
68360 CS Line Connection
CS0 FLASH
CS1 DRAM
CS2 VMEbus via DMA
CS3 Reserved
CS4 SRAM
CS5 CXC
CS6 RTC
CS7 Board Register
Generated
Signal
Autovector
ABORT/ACFAIL 7
Mailbox 5
SYSFAIL 3
Reserved 2
Reserved 1
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VM162/VM172
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