Take a look at our
ThinkPads.com HOME PAGE
For those who might want to contribute to the blog, start here: Editors Alley Topic
Then contact Bill with a Private Message
ThinkPads.com HOME PAGE
For those who might want to contribute to the blog, start here: Editors Alley Topic
Then contact Bill with a Private Message
X220 with Native Serial
X220 with Native Serial
Hello,
Looking for Native Serial RS-232 for my W7x64 X220. Tired of the RS-232 to USB connector.
How this sounds?
http://intrl.startech.com/Cards-Adapter ... RT~EC1S952
Looking for Native Serial RS-232 for my W7x64 X220. Tired of the RS-232 to USB connector.
How this sounds?
http://intrl.startech.com/Cards-Adapter ... RT~EC1S952
Re: X220 with Native Serial
How is one converter (ExpressCard-to-RS232) more "native" than another converter (USB-to-RS232)?
$77 for this?
$77 for this?
Thinkpad 25 (20K7), T490 (20N3), Yoga 14 (20FY), T430s (IPS FHD + Classic Keyboard), X220 4291-4BG
X61 7673-V2V, T60 2007-QPG, T42 2373-F7G, X32 (IPS Screen), A31p w/ Ultrabay Numpad
X61 7673-V2V, T60 2007-QPG, T42 2373-F7G, X32 (IPS Screen), A31p w/ Ultrabay Numpad
Re: X220 with Native Serial
because express card has more than 4 pins as USB does...
Re: X220 with Native Serial
That is true, but why is it important specifically for RS232 usage? I am seriously asking, as I am not familiar with RS232 intended usage so much.
Thinkpad 25 (20K7), T490 (20N3), Yoga 14 (20FY), T430s (IPS FHD + Classic Keyboard), X220 4291-4BG
X61 7673-V2V, T60 2007-QPG, T42 2373-F7G, X32 (IPS Screen), A31p w/ Ultrabay Numpad
X61 7673-V2V, T60 2007-QPG, T42 2373-F7G, X32 (IPS Screen), A31p w/ Ultrabay Numpad
-
- Admin Emeritus
- Posts: 3848
- Joined: Thu Sep 01, 2005 10:09 am
- Location: Sydney, Australia - Best Address on Earth!
Re: X220 with Native Serial
It has a hardware USART in it, and that is as good as it gets nowadays in terms of provisioning a real serial portcrised wrote:How this sounds?
Cheers,
Bill B.
-
- Senior Member
- Posts: 546
- Joined: Sun Jan 24, 2010 5:32 pm
- Location: USA : Illinois : Chicago
Re: X220 with Native Serial
A USB device shares the bus. Going through USB adds latency. Same story with MIDI and audio. Ask the experts who wrote MIDI on Wikipedia: "USB is over 15,000 times faster than MIDI, however, there is more latency introduced". Even USB 1 afforded the throughput for a 7-channel sound card. But even after the introduction of USB 2.0, professional external sound cards most often use IEEE 1394. Another thing to consider is drivers: a driver for serial USB device plus driver for USB host controller, adds potential for one more software failure.
Re: X220 with Native Serial
Why as real as it gets?
It has an UART... device that I have has UART too. so this is real serial, right?
It has an UART... device that I have has UART too. so this is real serial, right?
-
- Senior Member
- Posts: 546
- Joined: Sun Jan 24, 2010 5:32 pm
- Location: USA : Illinois : Chicago
Re: X220 with Native Serial
I found a person who reports a reason against USB serial adapters: their baud rate is not low enough.
http://www.aa8ia.org/2010/10/07/usb-to-serial-adapters/
http://www.aa8ia.org/2010/10/07/usb-to-serial-adapters/
-
- Admin Emeritus
- Posts: 3848
- Joined: Thu Sep 01, 2005 10:09 am
- Location: Sydney, Australia - Best Address on Earth!
Re: X220 with Native Serial
That's only an issue for RTTY purposes nowadays.automobus wrote:their baud rate is not low enough.
Most laptop users who are looking for full RS-232-C capability, need their laptop to look like a hardwired serial terminal to some other device, and will operate at much higher baud rates than RTTY applications.
Cheers,
Bill B.
-
- Similar Topics
- Replies
- Views
- Last post
-
-
Farewell to my X220...
by axur-delmeria » Tue Nov 28, 2023 12:15 am » in ThinkPad X200/X201/X220 and X300/X301 Series - 5 Replies
- 18115 Views
-
Last post by mikemex
Wed Jan 10, 2024 5:32 pm
-
-
-
Thinkpad X220 the webcam doesn't work but the thinklight does!!
by ned91 » Sat Dec 23, 2023 12:28 pm » in ThinkPad X200/X201/X220 and X300/X301 Series - 1 Replies
- 3979 Views
-
Last post by nomad1977
Sat Dec 23, 2023 6:33 pm
-
-
-
Thinkpad X220 Tablet Step-By-Step Windows 11 with all Fn key
by nomad1977 » Sat Dec 23, 2023 5:32 pm » in ThinkPad X200/X201/X220 and X300/X301 Series - 3 Replies
- 5534 Views
-
Last post by dr_st
Sun Dec 24, 2023 5:01 pm
-
-
-
Lazy jumping cursors on X220 with Debian 11 distro
by N4b00 » Mon Dec 25, 2023 8:01 am » in Linux Questions - 0 Replies
- 7417 Views
-
Last post by N4b00
Mon Dec 25, 2023 8:01 am
-
Who is online
Users browsing this forum: No registered users and 33 guests