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Programmable Hardware Manual (PHM)
© Tibbo Technology Inc.
The pin 9 of the RS232 port can also be used to provide "12V" power to an attached
serial device. Many small serial devices, such as barcode scanners, accept power on
pin 9 of their DB9 connectors.
"12V" actually means "input power on the power jack", which is not necessarily
stabilized. The power line of the jack passes through a software-controlled switch
and is then connected to pin 9 of the RS232 port through a Schottky diode (shown
on the diagram below). Therefore, the voltage on pin 9 is close to the input voltage
on the power jack. Also, the maximum current an attached serial device can source
depends on the maximum output power of the power adaptor (power supply)
plugged into the power jack (minus the power consumed by the DS1206 itself).
Tibbo serial-over-IP application supplied with the DS1206 has a dedicated
"PS" ("Power on pin 9") setting to control the power switch. To turn the power
switch on from within your Tibbo BASIC/C application, enable (configure as output)
line PL_IO_NUM8_PWROUT and then set this line to HIGH. Additional programming
information can be found in TIDE, TiOS, Tibbo BASIC, and Tibbo C Manual (see i.o
object and DS1206 platform documentation).
If you want to use pin 9 of the DB9M connector to power an attached serial device,
then you must power the DS1206 itself through the power jack. We know you
understand this, but we still had to mention it.
8.2.1.2
Ethernet Port
Ethernet port of the DS1206 is of 10/100BaseT type.