Quark Up R1270 - R1270CEVB - Technical Information Manual
19
USB connection
In the fol l owi ng i ma ge the connecti on between R1270 modul e a nd USB i nterfa ce i s s hown.
Si nce the maximum s upply current for the reader exceeds the USB li mi ta ti on (500mA), the s uppl y vol ta ge s ha l l be
provi ded vi a a n externa l power s ource or vi a a dua l USB ca bl e .
The 5V_USB s ignal a t pin 9 of reader connector i s not i ntended to s uppl y the modul e but i s us ed by the rea der to
detect the pres ence of a n USB hos t.
Fig. 2.6: Quark Up R1270 USB connection
A Vi rtual COM Port i s i mplemented, i n order to establish a l ink with the device, the host COM port s hall be confi gured
a s fol l ows :
Ba ud ra te:
115200
Pa ri ty:
None
Da ta bits:
8
Stop bi ts:
1
Fl ow Control:
none
The VID/PID combination that i dentifies the USB device is:
VID: 21E1
PID: 0080
Antenna port specifications
In the fol l owi ng ta bl e the pi nout of R1270 a ntenna i s s hown.
Pin #
Function
Direction
Description
INNER
RF OUT
OUT
RF output
OUTER
GND
-
Ground
Tab. 2.4: RF port pinout
Parameter
Min
Typ.
Max
Unit
RF output power
10
500
mW
10
27
dBm
Output power vs . power setting a ccuracy
± 1
dB
RF port i mpedance
50
Ω
Recommended antenna VSWR
2:1
-
Tab. 2.5: RF port electrical characteristics
