Section Iv - Principles Of Operation; Functional Description; Np Microprocessor - HP 3000 Series Installation And Service Manual

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PRINCIPLES OF OPERATION ·
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iv
I
This section contains functional-level and system-level
descriptions of the HP 30010A Intelligent Network Processor
(INP). The functional description lists the major functional
areas and briefly describes each of them. An example of a
typical functional-level operation follows, which serves to
summarize the functional des er ip tion. Then, an overview of the
system-level operation briefly discusses INP operations in
relation to the HP 3000 Series II or Series III Computer System.
4-1.
FUNCTIONA~
DESCRIPTION
The HP 30010A Intelligent Network Processor includes the follow-
ing major functional areas:
• INP Microprocessor
• Read-Only Memory (ROM)
• Random Access Memory (RAM)
• Direct Memory Access (Dtl.A)
• SDLC and BISYNC Datacomm
• Communication Line Interfaces
A block diagram of INP organization of the major functional areas
is shown in figure 4-1. The solid interconnecting lines in the
block diagram represent data paths while the broken lines
indicate service request paths.
4 ·2. INP Microprocessor
The Complementary-Metal-Oxide-Semiconductor
I
Silicon-on-Sapphire
(CMOS/SOS) Microprocessor is the heart of the INP. It is a high-
performance, low-power-consumption microprocessor primarily used
in controller applications. It offers a one-microsecond typical
instruction cycle time to execute any of the fixed-width, 16-bit
instructions. These instructions can process one-, four-i
eight-, or sixteen-bit fields. The fast instruction cycle time
4-1