- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄378162 > RM5231A-250-H (PMC-SIERRA INC) RM5231A⑩ Microprocessor with 32-Bit System Bus Data Sheet Preliminary PDF資料下載
參數(shù)資料
| 型號： | RM5231A-250-H |
| 廠商： | PMC-SIERRA INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | RM5231A⑩ Microprocessor with 32-Bit System Bus Data Sheet Preliminary |
| 中文描述： | 64-BIT, 250 MHz, MICROPROCESSOR, PQFP128 |
| 封裝： | MQFP-128 |
| 文件頁數(shù)： | 13/40頁 |
| 文件大?。?/td> | 595K |
| 代理商： | RM5231A-250-H |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁當前第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁
Proprietary and Confidential to PMC-Sierra, Inc and for its Customer’s Internal Use
Document ID: PMC-2002174, Issue 2
13
RM5231A Microprocessor with 32-Bit System Bus Data Sheet
Preliminary
Table 1 Integer Multiply/Divide Operations
The baseline MIPS IV ISA specifies that the results of a multiply or divide operation be placed in
the
Hi
and
Lo
registers. These values can then be transferred to the general purpose register file
using the Move-from-Hi and Move-from-Lo (
MFHI
/
MFLO
) instructions.
In addition to the baseline MIPS IV integer multiply instructions, the RM5231A also implements
the 3 operand multiply instruction,
MUL
. This instruction specifies that the multiply result go
directly to the integer register file rather than the Lo register. The portion of the multiply that
would have normally gone into the Hi register is discarded. For applications where it is known that
the upper half of the multiply result is not required, using the
MUL
instruction eliminates the
necessity of executing an explicit
MFLO
instruction.
Also included in the RM5231A are the multiply-add instructions,
MADU
/
MAD
. This instruction
multiplies two operands and adds the resulting product to the current contents of the Hi and Lo
registers. The multiply-accumulate operation is the core primitive of almost all signal processing
algorithms allowing the RM5231A to eliminate the need for a separate DSP engine in many
embedded applications.
Floating-Point Co-Processor
3.8
The RM5231A incorporates a high-performance fully pipelined floating-point co-processor which
includes a floating-point register file and autonomous execution units for multiply/add/convert and
divide/square root. The floating-point coprocessor is a tightly coupled execution unit, decoding
and executing instructions in parallel with, and in the case of floating-point loads and stores, in
cooperation with the integer unit. The superscalar capabilities of the RM5231A allow floating-
point computation instructions to issue concurrently with integer instructions.
Floating-Point Unit
3.9
The RM5231A floating-point execution unit supports single and double precision arithmetic, as
specified in the IEEE Standard 754. The execution unit is broken into a separate divide/square root
unit and a pipelined multiply/add unit. Overlap of the divide/square root and multiply/add
operations is supported.
The RM5231A maintains fully precise floating-point exceptions while allowing both overlapped
and pipelined operations. Precise exceptions are extremely important in object-oriented
programming environments and highly desirable for debugging in any environment.
Opcode
MULT/U,
MAD/U
Operand
Size
16 bit
32 bit
16 bit
32 bit
any
Latency
3
4
3
4
7
Repeat
Rate
2
3
2
3
6
Stall
Cycles
0
0
1
2
0
MUL
DMULT,
DMULTU
DIV, DIVD
DDIV,
DDIVU
any
any
36
68
36
68
0
0
相關PDF資料 |
PDF描述 |
|---|---|
| RM5231A-300-H | RM5231A⑩ Microprocessor with 32-Bit System Bus Data Sheet Preliminary |
| RM5231A-300-HI | RM5231A⑩ Microprocessor with 32-Bit System Bus Data Sheet Preliminary |
| RM5231A-350-H | RM5231A⑩ Microprocessor with 32-Bit System Bus Data Sheet Preliminary |
| RM5261A | RM5261A⑩ Microprocessor with 64-Bit System Bus Data Sheet Preliminary |
| RM5261A-250-H | RM5261A⑩ Microprocessor with 64-Bit System Bus Data Sheet Preliminary |
相關代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| RM525A-R2 | 制造商:Black Box Corporation 功能描述:2U Wallmount Cabinet, Beige |
| RM5260-133Q | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:64-Bit Microprocessor |
| RM5260-150Q | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:64-Bit Microprocessor |
| RM5260-175Q | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:64-Bit Microprocessor |
| RM5260-200Q | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:64-Bit Microprocessor |
發(fā)布緊急采購，3分鐘左右您將得到回復。