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參數(shù)資料
| 型號： | SMJ320C26FJ |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 數(shù)字信號處理 |
| 英文描述： | 16-BIT, 40 MHz, OTHER DSP, CQCC68 |
| 封裝： | CERAMIC, LCC-68 |
| 文件頁數(shù)： | 37/40頁 |
| 文件大?。?/td> | 577K |
| 代理商： | SMJ320C26FJ |
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SMJ320C26
DIGITAL SIGNAL PROCESSOR
SGUS 016A – AUGUST 1990 – REVISED AUGUST 2001
6
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251–1443
16
× 16 bit parallel multiplier (continued)
Incorporated into the SMJ320C26 instruction set are single-cycle multiply/accumulate instructions that allow
both operands to be fetched simultaneously. The data for these operations may reside anywhere in internal or
external memory, and can be transferred to the multiplier each cycle via the program and data buses.
Four product shift modes are available at the Product Register (PR) output that are useful when performing
multiply/accumulate operations, fractional arithmetic, or justifying fractional products.
timer
The SMJ320C26 provides a memory mapped 16-bit timer for control operations. The on-chip timer (TIM)
register is a down counter that is continuously clocked by CLKOUT1. A timer interrupt (TINT) is generated every
time the timer decrements to zero, provided the timer interrupt is enabled. The timer is reloaded with the value
contained in the period (PRD) register within the next cycle after it reaches zero so that interrupts may be
programmed to occur at regular intervals of PRD + 1 cycles of CLKOUT1.
memory control
The SMJ320C26 provides a total of 1568 words of 16 bit on-chip RAM, divided into four separate blocks (B0,
B1, B2, and B3). Of the 1568 words, 32 words (block B2) are always data memory, and all other blocks are
programmable as either data or program memory. A data memory size of 1568 words allows the SMJ320C26
to handle a data array of 1536 words, while still leaving 32 locations for intermediate storage. When using B0,
B1, or B3 as program memory, instructions can be downloaded from external memory into on-chip RAM, and
then executed.
When using on-chip program RAM, ROM, or high speed external program memory, the SMJ320C26 runs at
full speed without wait states. However, the READY line can be used to interface the SMJ320C26 to slower,
less expensive external memory. Downloading programs from slow off-chip memory to on-chip program RAM
speeds processing and cuts overall system costs.
The SMJ320C26 provides three separate address spaces for program memory, data memory, and I/O. The
on-chip memory is mapped into either the data memory or program memory space, depending upon the choice
of memory configuration.
The instruction configuration (parameter) is used as follows to configure the blocks B0, B1, and B3 as program
or as data memory.
CONFIGURATION
B0
B1
B3
0
1
2
3
Data
Program
Data
Program
Data
Program
Regardless of the configuration, the user may still execute from external program memory.
The SMJ320C26 provides a ROM of 256 words. The ROM is sufficient to allow the programming of a bootstrap
program and interrupt handler, or to implement self test routines.
The SMJ320C26 has six registers that are mapped into the data memory space at the locations 0–5; a serial
port data receive register, serial port data transmit register, timer register, period register, interrupt mask register,
and global memory allocation register.
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| SMJ320C30 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:DIGITAL SIGNAL PROCESSOR |
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| SMJ320C30GBM40 | 功能描述:數(shù)字信號處理器和控制器 - DSP, DSC Digital Signal Proc RoHS:否 制造商:Microchip Technology 核心:dsPIC 數(shù)據(jù)總線寬度:16 bit 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:2 KB 最大時(shí)鐘頻率:40 MHz 可編程輸入/輸出端數(shù)量:35 定時(shí)器數(shù)量:3 設(shè)備每秒兆指令數(shù):50 MIPs 工作電源電壓:3.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TQFP-44 安裝風(fēng)格:SMD/SMT |
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