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參數(shù)資料
| 型號(hào)： | TMS320C241FNS |
| 元件分類(lèi)： | 數(shù)字信號(hào)處理 |
| 英文描述： | 16-Bit Digital Signal Processor |
| 中文描述： | 16位數(shù)字信號(hào)處理器 |
| 文件頁(yè)數(shù)： | 52/116頁(yè) |
| 文件大?。?/td> | 1485K |
| 代理商： | TMS320C241FNS |
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TMS320F243, TMS320F241
DSP CONTROLLERS
SPRS064B – DECEMBER 1997 – REVISED FEBRUARY 1999
52
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251–1443
shadowed bits
Many of the control register bits are described as “shadowed”. This means that changing the value of one of
these bits does not take effect until the current conversion is complete.
serial peripheral interface (SPI) module
The ’F243/’F241 devices include the four-pin serial peripheral interface (SPI) module. The SPI is a high-speed
synchronous serial I/O port that allows a serial bit stream of programmed length (one to sixteen bits) to be shifted
into and out of the device at a programmable bit-transfer rate. Normally, the SPI is used for communications
between the DSP controller and external peripherals or another processor. Typical applications include external
I/O or peripheral expansion through devices such as shift registers, display drivers, and ADCs. Multidevice
communications are supported by the master/slave operation of the SPI.
The SPI module features include the following:
Four external pins:
–
SPISOMI: SPI slave-output/master-input pin
–
SPISIMO: SPI slave-input/master-output pin
–
SPISTE: SPI slave transmit-enable pin
–
SPICLK: SPI serial-clock pin
NOTE: All these four pins can be used as GPIO, if the SPI module is not used.
Two operational modes: master and slave
Baud rate: 125 different programmable rates/5 Mbps at 20-MHz CPUCLK
Data word length: one to sixteen data bits
Four clocking schemes controlled by clock polarity and clock phase bits include:
–
Falling edge without phase delay: SPICLK active high. SPI transmits data on the falling edge of the
SPICLK signal and receives data on the rising edge of the SPICLK signal.
–
Falling edge with phase delay: SPICLK active high. SPI transmits data one half-cycle ahead of the
falling edge of the SPICLK signal and receives data on the falling edge of the SPICLK signal.
–
Rising edge without phase delay: SPICLK inactive low. SPI transmits data on the rising edge of the
SPICLK signal and receives data on the falling edge of the SPICLK signal.
–
Rising edge with phase delay: SPICLK inactive low. SPI transmits data one half-cycle ahead of the
falling edge of the SPICLK signal and receives data on the rising edge of the SPICLK signal.
Simultaneous receive and transmit operation (transmit function can be disabled in software)
Transmitter and receiver operations are accomplished through either interrupt-driven or polled algorithms.
Eleven SPI module control registers: Located in control register frame beginning at address 7040h.
NOTE: All registers in this module are 16-bit registers that are connected to the 16-bit peripheral bus. When a register is accessed, the register
data is in the lower byte (7–0), and the upper byte (15–8) is read as zeros. Writing to the upper byte has no effect.
Figure 12 is a block diagram of the SPI in slave mode.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TMS320C241PGS | 16-Bit Digital Signal Processor |
| TMS320F241FNQ | 16-Bit Digital Signal Processor |
| TMS320F241PGQ | 16-Bit Digital Signal Processor |
| TMS320F243PGEQ | 16-Bit Digital Signal Processor |
| TMS320F243PGES | 16-Bit Digital Signal Processor |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TMS320C241PGS | 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:16-Bit Digital Signal Processor |
| TMS320C242 | 制造商:TI 制造商全稱(chēng):Texas Instruments 功能描述:DSP CONTROLLER |
| TMS320C242FN | 制造商:TI 制造商全稱(chēng):Texas Instruments 功能描述:DSP CONTROLLER |
| TMS320C242FNA | 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:16-Bit Digital Signal Processor |
| TMS320C242FNS | 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:16-Bit Digital Signal Processor |
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