USB/UART converter and its control method

Claim 1

A USB/UART converter connected between a DTE and a DCE, said USB/UART converter comprising: a USB controller connected to a USB of said DTE, comprising a first register into which control signals and parameters are written: a second register into which status signals are written; a third register into which data supplied from said DCE to said DTE are written; a fourth register into which data supplied from said DTE to said DCE are written; a signal direction controller connected with said registers for regulating said control signals, parameters, status signals and data; and a UART controller connected between said DCE and said USB controller; wherein said control signals for said DCE and said parameters for said UART controller are transferred from said DTE through said USB controller in a control transfer mode; the UART controller transfers status signals through said USB controller to said DTE in an interrupt transfer mode after detecting said status signals from said DCE; and data can be transferred between said DTE and said DCE in an isochronous data transfer mode in response to said parameters.

Claim 6

A method of controlling a USB/UART converter, connected between a DTE and a DCE and including a USB controller having a first register, a second register, a third register, and a fourth register; and a UART controller, said control method comprising the steps of: (a) supplying control signals for said DCE and parameters for said UART controller from said DTE through said USB controller in a control transfer mode; (b) supplying status signals through said USB controller to said DTE in an interrupt transfer mode after said UART controller detects said status signals from said DCE; (c) transferring data between said DTE and said DCE in an isochronous data transfer mode responsive to said parameters; and (e) writing said control signals and said parameters into said first register, writing said status signals into said second register, writing said data supplied from said DCE to said DTE into said third register, and writing said data supplied from said DTE to said DCE into said fourth register.

Claim 7

A method of controlling a USB/UART converter, connected between a DTE and a DCE and including a USB controller having a first register, a second register, a third register, and a fourth register; and a UART controller, said control method comprising the steps of: (a) supplying control signals for said DCE and parameters for said UART controller from said DTE through said USB controller in a control transfer mode; (b) supplying status signals through said USB controller to said DTE in an interrupt transfer mode after said UART controller detects said status signals from said DCE; (c) transferring data between said DTE and said DCE in an isochronous data transfer mode responsive to said parameters; and (e) writing said control signals and said parameters into said first register, writing said status signals into said second register, writing said data supplied from said DCE to said DTE into said third register, and writing said data supplied from said DTE to said DCE into said fourth register.