VM162/VM172
Chapter 2 Functional Description
Juli 23, 1997
Page 2- 7
© PEP Modular Computers
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
68360 CS Line
Connection
CS0
FLASH
CS1
DRAM
CS2
VMEbus via DMA
CS3
Reserved
CS4
SRAM
CS5
CXC
CS6
RTC
CS7
Board Register
Signal
Generated
Autovector
ABORT/ACFAIL
7
Mailbox
5
SYSFAIL
3
Reserved
2
Reserved
1
Summary of Contents for VM162
Page 2: ......
Page 6: ...VM162 VM172 Table of Contents Page TOC 4 PEP Modular Computers Juli 23 1997 ...
Page 7: ...VM162 VM172 Juli 23 1997 Page 0 1 PEP Modular Computers Preface ...
Page 12: ...VM162 VM172 Chapter 1 Introduction Page 1 2 PEP Modular Computers Juli 23 1997 ...
Page 62: ...VM162 VM172 Chapter 3 Configuration Page 3 2 PEP Modular Computers Juli 23 1997 ...
Page 72: ...VM162 VM172 Chapter 4 Programming Page 4 2 PEP Modular Computers July 19 1997 ...
Page 117: ...3 OS 9 System Modem 3 1 15 pin Connector 3 2 8 pin RJ45 Connector SMART I O ...
Page 119: ...4 2 Hardware Handshake 4 2 1 15 pin Connector 4 2 2 8 pin RJ45 Connector SMART I O ...