Intel 80960HD - Manual (Page 9)

80960HA/HD/HT
Datasheet 9
1.0 About This Document
This document describes the parametric performance of Intel’s 80960Hx embedded superscalar
microprocessors. Detailed descriptions for functional topics, other than parametric performance,
are published in the i960
®
Hx Microprocessor User’s Guide (272484).
In this document, ‘80960Hx’ and ‘i960 Hx processor’ refer to the products described in Table 1 .
Throughout this document, information that is specific to each is clearly indicated.
2.0 Intel 80960Hx Processor
The Intel 80960Hx processor provides new performance levels while maintaining backward
compatibility (pin
1
and software) with the i960 CA/CF processor. This newest member of the
family of i960 32-bit, RISC-style, embedded processors allows customers to create scalable
designs that meet multiple price and performance points. This is accomplished by providing
processors that may run at the bus speed or faster using Intel’s clock multiplying technology
(see
Table 1 ). The 80960Hx core is capable of issuing 150 million instructions per second, using a
sophisticated instruction scheduler that allows the processor to sustain a throughput of two
instructions every core clock, with a peak performance of three instructions per clock. The
80960Hx-series comprises three processors, which differ in the ratio of core clock speed to external
bus speed.
Figure 1. 80960Hx Block Diagram
Execution Unit
Programmable
Bus Controller
Bus Request Queues
Six-Port Register File
32-bit Base Bus
Instruction Cache
128-Bit Cache Bus
Instruction Prefetch Queue
Interrupt Controller
Control
Address
Data
Memory-Side
Machine Bus
Register-Side
Machine Bus
Memory Region Configuration
Multiply/Divide Unit
Interrupt
Port
Address Generation Unit
Data Cache
16 Kbyte, Four-Way Set-Associative
8 Kbyte, Four-Way Set-Associative
Guarded Memory Unit
Timers
JTAG Port
Parallel Instruction Scheduler
Data RAM - 2 Kbyte
Register Cache - 5 to 15 sets
64-bit SRC1 Bus
64-bit SRC2 Bus
64-bit DST Bus
128-bit Load Bus
128-bit Store Bus
1. The 80960Hx is not “drop-in” compatible in an 80960Cx-based system. Customers may design systems that accept either 80960Hx or Cx
processors.
Table 1. 80960Hx Product Description
Product Core Voltage Operating Frequency (bus/core)
80960HA 1x 3.3 V † 25/25, 33/33, 40/40
80960HD 2x 3.3 V † 25/50, 33/66, 40/80
80960HT 3x 3.3 V † 25/75
† Processor inputs are 5 V tolerant.