PL2303HXD
===>Device Descriptor<===
bLength: 0x12
bDescriptorType: 0x01
bcdUSB: 0x0110
bDeviceClass: 0x00 -> This is an Interface Class
Defined Device
bDeviceSubClass: 0x00
bDeviceProtocol: 0x00
bMaxPacketSize0: 0x40 = (64) Bytes
idVendor: 0x067B = Prolific Technology, Inc.
idProduct: 0x2303
bcdDevice: 0x0400
PL2303TA
===>Device Descriptor<===
bLength: 0x12
bDescriptorType: 0x01
bcdUSB: 0x0200
bDeviceClass: 0x00 -> This is an Interface Class
Defined Device
bDeviceSubClass: 0x00
bDeviceProtocol: 0x00
bMaxPacketSize0: 0x40 = (64) Bytes
idVendor: 0x067B = Prolific Technology, Inc.
idProduct: 0x2303
bcdDevice: 0x0300
PL2303HX(A)/XA ( EOL : PHASED OUT SINCE 2012 )
===>Device Descriptor<===
bLength: 0x12
bDescriptorType: 0x01
bcdUSB: 0x0110
bDeviceClass: 0x00 -> This is an Interface Class
Defined Device
bDeviceSubClass: 0x00
bDeviceProtocol: 0x00
bMaxPacketSize0: 0x40 = (64) Bytes
idVendor: 0x067B = Prolific Technology, Inc.
idProduct: 0x2303
bcdDevice: 0x0300
You can use the two fields bcdUSB & bcdDevice to distinguish PL2303HXD
/ PL2303TA / PL2303HX(A)/XA
Johan Hovold <johan@xxxxxxxxxx> 於 2021年2月24日 週三 上午12:51寫道：
>
> On Tue, Feb 23, 2021 at 11:30:41AM -0500, Michael G. Katzmann wrote:
> > On 2/23/21 11:14 AM, Johan Hovold wrote:
> > > I only have an HXD (and a GC) here.
> > >
> > > The HXD has bcdUSB as 1.10 unlike your TA with 2.00, but not sure that
> > > helps.
> >
> > Sound promising .. why do you think this is this not reliable?
>
> Perhaps it is. Perhaps even bcdDevice of 3.00 is enough (includes some
> older variants that the TA replaced supposedly). Not sure anyone ever
> tried the current scheme on those older models.
>
> Charles, could you post the output of "lsusb -v" for your PL2303TA? And
> did you verify that you actually got 110 Bd with the current Linux
> driver?
>
> Johan
