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PACE1754 PDF预览

PACE1754

更新时间: 2024-11-13 04:11:11
品牌 Logo 应用领域
PYRAMID /
页数 文件大小 规格书
20页 171K
描述
SINGLE CHIP, 40MHz CMOS PROCESSOR INTERFACE CIRCUIT (PIC)

PACE1754 数据手册

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PACE1754  
SINGLE CHIP, 40MHz CMOS  
PROCESSOR INTERFACE CIRCUIT (PIC)  
FEATURES  
The PACE1754 (PIC) is a support chip for the  
PACE1750A/AE Processor. It eliminates the SSI/  
MSI Logic and external system functions  
required in typical 1750A implementations.  
Provides a significant savings in part-count and  
power dissipation enhancing reliability and  
overall system speed performance.  
Provides an optimal interface when used with  
the PACE1753 MMU/COMBO in a full 1750A  
implementation.  
Provides the following additional important  
system functions:  
— Programmable READY for memory and I/O  
— Automatic READY during self-test and  
internal I/O instructions  
— 100KHz timer clock output provided  
— Programmable system watchdog—ranges  
from 1 µs to 1 minute  
— Programmable Bus time-out function  
— Memory Parity generation/detection  
— Error detection of unimplemented memory  
and/or I/O space addressing  
— First failing memory address register for  
diagnostics  
— High drive three-state address latches  
— Built-in system test program—automatically  
tests the PACE1750A/AE CPU, PACE1753  
MMU/COMBO, PACE1754 PIC and system  
PACE1754 PROCESSOR INTERFACE  
CIRCUIT DESCRIPTION  
address lines as well as memory and I/O  
strobes  
— System configuration decoding and buffering  
— Interrupt acknowledge decoder and strobe  
— Start up ROM support per MIL-STD-1750A  
— Memory or I/O READ/WRITE three-state  
strobes with external three-state control for  
DMA applications  
The PACE1754 Processor Interface Circuit (PIC) is a  
single chip implementation of many special system  
functions that are often required when using the  
PACE1750A/AE, single chip, 40MHz CMOS  
Microprocessor. The PIC allows a system designer to  
design a higher performance, more effecient  
microprocessor system which uses less power and takes  
up less board space than was previously possible.  
20, 30 and 40 MHz operation over full Military  
Temperature Range  
In addition to providing significant savings in part count  
andpowerdissipationthePICusesonlya5V±10%,single  
supply and operates at 20, 30 and 40 MHz over the fully  
Military Temperature Range. The PIC provides many  
importantsystemfunctions.Thesefunctionsaregoverned  
by respective bit positions in a programmable Control  
Register which is incorporated in the PIC. The individual  
bits of the control register are set to select the various  
features and are set to a specified default value upon  
Reset.  
Single 5V ± 10% Power Supply  
Power Dissipation over Military Temperature  
Range  
< 0.25 watts at 20 MHz  
< 0.30 watts at 30 MHz  
< 0.35 watts at 40 MHz  
Available in:  
— 64-Pin DIP or Gull Wing (50 Mil Pin centers)  
— 68-Pin Pin Grid Array (PGA) (100 Mil centers)  
— 68-Lead Quad Pack  
Do c um e nt # MICRO-5 REV C  
Re vise d No ve m b e r 2005  

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