Bus type bar code decoding chip

The utility model provides a bus type bar code decoding chip. The bus type bar code decoding chip comprises a data memory used for storing the bar code image, a register set, a bar code decoding line used for processing the bar code image, a main control logic module and a bus interface, wherein the register set comprises a command register and a data register, the command register is used for storing the data temporarily, the main control logic module obtain the processing command from the command register and transmits the bar code image stored in the data memory to the bar code decoding line for decoding, and the bus interface receives the command from an external bus to the command register. With the arrangement, the bar code decoding chip can be connected with the bus of the ordinary microprocessor, thereby reducing the burden of the research staff; the bus type bar code decoding chip has convenient operation, faster decoding speed and lower cost, and has the function of processing different coding types