Specifications

16 Application Module
X
Service 3/96
Honeywell Inc.
Hardware Description of LCN Node Processors
3.2 HMPU Processor and Associated Boards
3.2 HMPU Processor and Associated Boards
Overview
The HMPU node processor has a 68020 microprocessor and includes
floating point calculation hardware capability. It also has 2 megawords of
on-board memory.
Additional memory for the HMPU processor in the A
X
M node is provided
by a QMEM board.
The HMPU board does not have LCN interface circuits and consequently
must always have an LLCN board as its partner to form the kernel for the
A
X
M LCN node.
HMPU indicators
The HMPU board indicators are visible from the free edge of the board
while it is installed in a chassis. They provide visual indications regarding
the existing conditions on the board.
An indicator diagram follows:
The HMPU indicators are illustrated in the following diagram:
Indicator
description
The following table gives a description of the indicators on the HMPU
board. Reference the preceding diagram.
Table 3-2 HMPU Error Indicators
LED Description Suspected cause if abnormal
Pass Module Test On after board passes self-test.
Normally on.
HMPU
RST/PWR Fail On when a reset operation
caused by the reset button or
power on is in progress. Normally
off.
HMPU
Self-Test
Error
Pass MOD
Test
(Green)
RST/PWR
Fail
Data
Compare
Error
DTAK
Time
Out
BGAK
Time
Out
Data
Parity
Error
Bus
Error
Node
Address/Error
Display
EDAC
Multi-Bit
Error
EDAC
Single-Bit
Error
Access
Violation
(HMPU Only)
Red LEDs
40023