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| 型號： | IMST425-G25S |
| 元件分類： | 32位微控制器 |
| 英文描述： | 32-Bit Microprocessor |
| 中文描述： | 32位微處理器 |
| 文件頁數(shù)： | 3/74頁 |
| 文件大?。?/td> | 563K |
| 代理商： | IMST425-G25S |
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1 Introduction
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3
1
Introduction
The IMS T400 transputer is a 32 bit CMOS microcomputer with graphics support. It has 2 Kbyteson-chip
RAM for highspeed processing, a configurable memory interface and two standard INMOS communica-
tion links. The instruction set achieves efficientimplementation of high level languages such as ANSI C
andprovidesdirectsupportfoRconcurrencywhenusingeitherasingletransputeroranetwork.Procedure
calls, process switching and typical interrupt latency are sub-microsecond.
For convenience of description, the IMS T400 operation is split into the basic blocks shown in figure 1.1.
32
32
32
32
32
Link
Interface
External
Memory
Interface
2 Kbytes
of
On-chip
RAM
32 bit
Processor
Timers
System
Services
VDD
GND
ClockIn
ProcSpeedSelect0–2
EventAck
EventWaiting
LinkIn0
LinkOut0
CapPlus
CapMinus
Reset
Analyse
ErrorIn
BootFromROM
Error
ProcClockOut
notMemS0–4
notMemWrB0–3
notMemRd
notMemRf
RefreshPending
MemWait
MemConfig
MemReq
MemGranted
LinkIn1
LinkOut1
EventReq
Event
DisableIntRAM
MemnotWrD0
MemnotRfD1
MemAD2–31
LinkSpecial
Link0Special
Link1Special
Link
Services
Link
Interface
32
Figure 1.1
IMS T400 block diagram
The processorspeed of thedevice is fixedat 20 MHz and achieves aninstruction throughput of 20 MIPS
peak and 10 MIPS sustained.
High performance graphics support is provided by microcoded block move instructions which operate at
the speed of memory. The two-dimensional block move instructionsprovide for contiguous block moves
as well as block copying of either non-zero bytes of dataonly orzero bytes only.Block move instructions
can be usedto provide graphics operationssuch as text manipulation, windowing, panning,scrolling and
screen updating.
Cyclic redundancy checking (CRC) instructions are available for use on arbitrary length serial data
streams, to provide error detectionwhere data integrity is critical.Another featureof theIMS T400,useful
for pattern recognition, is the facility to count bits set in a word.
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