Serial transmission controller and serial transmission decoder as well as serial transmission method thereof
A serial transmission and controller technology, applied in the fields of instruments, electrical digital data processing, etc., can solve the problems of low transmission efficiency and inability to meet the bandwidth requirements of high-speed systems, so as to shorten the time, reduce the transmission time, and improve the transmission efficiency. Effect
Inactive Publication Date: 2009-12-23
SUNPLUS TECH CO LTD
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Problems solved by technology
Once the data reading address is discontinuous, the command and address bits must be sent repeatedly, resulting in low transmission efficiency and unable to meet the bandwidth requirements of current high-speed systems
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[0033] In order to make the above and other objects, features and advantages of the present invention more comprehensible, preferred embodiments will be described in detail below together with the accompanying drawings.
[0034] Figure 3A For a block diagram of a serial peripheral interface transmitting end according to an embodiment of the present invention, please refer to Figure 3A , the transmitting end 310 in this embodiment includes a serial transmission controller 320 and a microcontroller unit 330 . Wherein, the serial transmission controller 320 includes a current address register 322 , an address encoder 324 , a serial interface encoder 326 , a data register 327 , and an instruction register 328 .
[0035] When the micro control unit 330 wants to access data to the receiving end (not shown in the figure), it must first send the access address 332 and data 334 . The data register 327 receives and registers the data 334 transmitted from the microcontroller unit 330...
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The invention provides a serial transmission controller and a serial transmission decoder as well as a method of serial transmission thereof. Firstly, a current address is compared with an access address, an access address mode is selected from a plurality of transfer address modes and address information is produced, wherein, each transfer address mode is used for transferring the address information by using different bit long; then access order is selected from a serial order set according to the access address mode; finally, the access order and the address information are transferred on a serial interface by a serial transmission mode. The invention can conduct command coding with different bit long for the access order and transfers the coded access order on the serial interface, thus reducing the required bits when in transmission and further improving the transmission efficiency.
Description
technical field [0001] The present invention relates to a data transmission controller, a decoder and a data transmission method thereof, and in particular to a serial transmission controller, a decoder and a serial transmission method thereof. Background technique [0002] Traditionally, the access interface of memory devices such as flash memory uses a parallel transmission interface of the address and data bus, but such an interface needs to use a large number of pins, resulting in high chip packaging costs. Therefore, in order to reduce the number of chip pins, a serial transmission interface is widely used, such as a serial peripheral interface (Serial Peripheral Interface, SPI). [0003] figure 1 A diagram illustrating the data transmission path of a general serial peripheral interface. Please refer to figure 1 , the master control terminal 150 and the SPI flash memory 100 (i.e. the controlled terminal) transmit data to each other through the serial peripheral inter...
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IPC IPC(8): G06F13/38
Inventor 李育柱陈文宽
Owner SUNPLUS TECH CO LTD