- What does each of the 9 pins do?
- Which pins do I actually need?
- What will my cable look like?
- What does the signal coming from the data pin look like?
So I fired up Google, did a search on “serial port” and lots of information about the connectors showed up, I'll summarize it here (for the 9-pin variant):

Pin # | Abbreviation | Name | Function |
1 | CD | Carrier Detect | Used by modem to signal that it is connected to a working phone line. |
2 | RD | Receive Data | Local device receives data sent from the other device. |
3 | TD | Transmit Data | Local device transmits data to the device at the other end. |
4 | DTR | Data Terminal Ready | Local device sends a signal that it is ready to transmit. |
5 | SG | Signal Ground | Ground. |
6 | DSR | Data Set Ready | Remote device signals if it's ready to transmit. |
7 | RTS | Request To Send | Local device requests if remote device is ready to receive data. |
8 | CTS | Clear To Send | Remote device acknowledges that it's ready to receive data. |
9 | RI | Ring Indicator | Used by modem to indicate that it has detected a ringing signal on the phone line. |
Well, since my IC is not a modem, I am not going to use pins 1 and 9. My IC does not send feedback, so that excludes pin 2. So far, that leaves pins 3 – 8. Let's examine pins 4 and 6 a little closer: pin 4 sends a signal out that to tell that it's ready to transmit, and pin 6 is waiting for an incoming signal which means the other device is also ready to transmit. The IC is ready to receive data at any given time, so I will connect pin 4 to pin 6, which in fact tells the port that it's ready to transmit as soon the computer itself is ready. I also will connect pin 7 to pin 8 (check out the table to see why that is). Pin 5, I will leave this pin unconnected, since my IC is already grounded at another point. And last but not least, the Transmit Data pin (#3) will be used to send data to the IC.
So the connector which goes into my computer will look like this:
Side note: there are 9 pin connectors which are easy to disassemble, specially designed to be altered to your own needs. I used one that looks like this:
Side note #2: on Ubuntu, I used the program “statserial” to inspect the idle state of my serial port, when my connector was connected.
The question remaining here, is how does the signal (or wave) coming from the TD pin look like? I will be going into more detail about this in my next post. Stay tuned!
jordan 6 black infrared
ReplyDeletenorth face coats
hermes belt
fitflop outlet store usa
under armour outlet
burberry scarf
gucci shoes
coach handbags
burberry sale
kevin durant shoes
north face jackets
converse shoes sale
coach factory outlet
air jordan 14
coach factory outlet online
louboutin outlet
fitflop sale
nike nfl jerseys 2015
north face outlet store
ugg boots
reebok outlet
michael kors handbags
christian louboutin sale
north face jackets clearance
new kevin durant shoes
nike clearance
toms outlet
dior handbags
michael kors outlet store
fitflops clearance
kate spade sale
jordan 12
ugg boots
coach purses sale
gucci outlet
wholesale jordans
canada goose clearance
1030wjl
Great Article Artificial Intelligence Projects
DeleteProject Center in Chennai
JavaScript Training in Chennai
JavaScript Training in Chennai Project Centers in Chennai
jordan 6 black infrared
ReplyDeletenorth face coats
hermes belt
fitflop outlet store usa
under armour outlet
burberry scarf
gucci shoes
coach handbags
burberry sale
kevin durant shoes
north face jackets
converse shoes sale
coach factory outlet
air jordan 14
coach factory outlet online
louboutin outlet
fitflop sale
nike nfl jerseys 2015
north face outlet store
ugg boots
reebok outlet
michael kors handbags
christian louboutin sale
north face jackets clearance
new kevin durant shoes
nike clearance
toms outlet
dior handbags
michael kors outlet store
fitflops clearance
kate spade sale
jordan 12
ugg boots
coach purses sale
gucci outlet
wholesale jordans
canada goose clearance
1030wjl
2016-05-27keyun
ReplyDeletejordan retro 4
nike sb dunks
air jordan shoes
nike roshe run
air jordan shoes
louis vuitton outlet
michael kors purses
nike store
basketball shoes
asics shoes for women
tory burch flats
nike air max uk
kate spade handbags
longchamp outlet
louis vuitton outlet
kd 7 shoes
retro 11
jordan retro 11
christian louboutin shoes
air jordan 8
ray ban outlet
michael kors outlet
ray ban outlet
coach outlet online
designer handbags
nike running shoes
michael kors outlet
nike running shoes for men
louis vuitton purses
ray ban sunglasses outlet
adidas originals store
coach factory outlet
coach outlet
adidas wings
kobe 10
ray ban sunglasses uk
adidas yeezy
michael kors outlet
coach factory outlet online
20160627meiqing
ReplyDeletemichael kors outlet
mont blanc pens
michael kors outlet
nike free flyknit
cheap ferragamo shoes
cheap jordans
air jordan uk
fake oakleys outlet
jimmy choo outlet
nike tn
yeezy boost 350
louis vuitton outlet online
nike air max
hermes belt
mizuno running shoes
louis vuitton handbags
coach factory outlet
cheap jordans
ray ban sunglasses
christian louboutin shoes
air force 1
gucci outlet
nike roshe run women
jordan pas cher
prada sunglasses
stephen curry shoes
fitflops sale clearance
holliste sale
ralph lauren outlet
true religion jeans
dior sunglasses
rolex replica watches
christian louboutin
adidas stan smith
valentino shoes on sale
ray bans
Cheap Jordans Nike Air Max lebron james shoes 2016 jordans for sale Cheap Jordans for sale Nike free Run Nike Store cheap nike basketball shoes cheap jordan shoes nike free 5.0 jordans 2016 Nike Outlet nike basketball shoes 2016 jordan shoes new jordans kobe basketball shoes Cheap Nike Air Max cheap kd shoes kobe basketball shoes authentic christian louboutin outlet red bottoms shoes on sale red sole shoes christian louboutin christian louboutin outlet
ReplyDeletecoach outlet clearance
ReplyDeleteair jordans
adidas yeezy 350
longchamp bags
gucci belts
jordan 3
christian louboutin shoes
lebron 13 shoes
oakley outlet
adidas superstars
louis vuitton outlet
coach outlet
mont blanc pens
louis vuitton handbags uk
polp ralph lauren
coach outlet store online clearances
oakley sunglasses
toms shoes
coach outlet
toms outlet
kevin durant shoes 7
christian louboutin shoes
fitflops shoes
ralph lauren outlet
abercrombie outlet
jordans for sale
burberry outlet
juicy couture
instyler max
chenyingying20160809
ugg sale
ReplyDeletemichael kors handbags
pandora
ugg outlet
timberland boots
christian louboutin outlet
fitflops sale clearance
ralph lauren outlet
coach outlet
coach outlet store online clearances
20161224caiyan
Polo Outlet
ReplyDeleteCoach Factory Outlet
Coach Outlet Store Online
Oakley Sunglasses Outlet
Louboutin Shoes
Polo Outlet
Ray Ban Outlet
Coach Outlet Online
Coach Factory Outlet
Coach Outlet
Coach Outlet Store Online Kate Spade Outlet Cheap Jordans Coach Purses Coach Outlet Kate Spade Outlet Nike Air Max Shoes Red Bottom Shoes Adidas Yeezy Boost 350 Adidas Original
ReplyDeleteclb1204
ReplyDeleteugg outlet
michael kors outlet
fitflops
pandora jewelry outlet
michael kors outlet
canada goose
coach outlet store
michael kors outlet
pandora charms uk
ugg outlet
Coach Outlet Store Online Kate Spade Outlet Cheap Jordans Coach Purses Coach Outlet Kate Spade Outlet Nike Air Max Shoes Red Bottom Shoes Adidas Yeezy Boost 350 Adidas Original
ReplyDelete2018410 leilei3915
ReplyDeletegucci outlet
oakley sunglasses wholesale
giuseppe zanotti sneakers
christian louboutin shoes
mcm bags
pandora
mulberry sale
mlb jerseys wholesale
pandora
pandora outlet
Very nice the article
ReplyDeletePENGOBATAN PENYAKIT AMANDEL
Pengobatan Alami Darah Tinggi
Mengobati Stroke Secara Alami
Obat Sakit Diare
Cara Menghilangkan Jerawat
Mengobati Penyakit Herpes
Cara Mengatasi Gusi Bengkak
3、
ReplyDeletechristian louboutin
birkenstock outlet
ferragamo outlet
fitflops sale clearance
reebok shoes
adidas outlet online
cheap jordans
coach outlet
ferragamo shoes
mowang05-27
yeezy boost
ReplyDeletekyrie 3 basketball shoes
mbt
valentino shoes
vans
michael kors outlet
adidas outlet
rihanna puma
kd shoes
louboutin
2018-0612y
Very nice the article
ReplyDeletePengobatan Alami Darah Tinggi
Mengobati Stroke Secara Alami
Obat Sakit Diare
Cara Menghilangkan Jerawat
Cara Mengatasi Penyakit Asma
Pengobatan Penyakit Herpes
Cara Mengatasi Gusi Bengkak
ugg boots
ReplyDeletebirkenstock outlet
christian louboutin outlet
nike blazer
burberry canada
soldier 10
ugg outlet
ugg for men
soccer jerseys
coach outlet
chenlina20180913
michael kors canada
ReplyDeletedak prescott jersey
kate spade outlet
guess
oakley sunglasses
christian louboutin
nike air max
air max
dolce & gabbana
kobe 12
2018.10.23chenlixiang
now present in your city cara menggugurkan kandungan
ReplyDelete1. manfaat kurma untuk persalinan
2. manfaat buah nanas
3. aktivitas penyebab keguguran
4. apakah usg berbahaya
5. penyebab telat haid
6. cara melancarkan haid
7. cara mengatasi keputihan
8. tanda tanda menopause
golden goose sneakers
ReplyDeleteyeezy
vans shoes
off white nike
nike basketball shoes
fitflop
nike cortez
moncler jackets
louboutin shoes
lebron 17
yeezy shoes
ReplyDeletemoncler outlet
jordan shoes
supreme clothing
yeezy boost 350
pandora jewelry
kobe basketball shoes
air jordan
yeezy boost 380
lebron shoes
http://passexamdumpspdf.wikidot.com/
ReplyDeletehttp://passexamdumpspdf.wikidot.com/about
http://passexamdumpspdf.wikidot.com/contact
http://passexamdumpspdf.wikidot.com/favourites
replica bags joy he has a good point e4h04s0j18 replica bags 168 mall click this site o7b09f5r36 best replica bags online replica bags wholesale india zeal replica bags anonymous h8y59t7v69 replica bags review
ReplyDeletea4k23r1y14 i1z02l7q98 p5v88a6n82 w5d59c5k74 y6i90c5q47 e7k74z3x09
ReplyDelete