9
17.
Power over Ethernet – SIP1 (optional)
The UEZGUI-EXP-DK Board includes a mounting point for an AG9120-S PoE module. If this module is installed and
soldered down, the uEZGUI-EXP-DK and attached uEZGUI can be powered over Ethernet. (IEEE 802.3af-2003 compliant)
P8 must be unplugged when PoE is used!
SIP1 Pin Number
Description
1
VA1 +
2
VA2 –
3
VB1 +
4
VB2 –
5
CP1 (class detect)
6
CP2 (class detect)
7
Ground
8
12V Power output to EXP-DK
9
Output voltage
10
No Connect
R21 controls the PoE class that is seen by the power source. By default this is set to class 0, the most flexible option in
the original PoE spec. R18 and R20 can be loaded to adjust the 12V output. See the AG9120-S datasheet for details.
Note that most uEZGUIs average around 1W-3W power draw, so class 1 or class 2 would be suitable for most uEZGUI
final hardware implementations (such as an access control box) without additional power loads.
R21 Value
PoE Class
Power available
No load (default)
Class 0
0.44W – 12.29W
698 ± 1 %
Class 1
0.44W – 3.84W
383 ± 1 %
Class 2
3.84W – 6.49W
249 ± 1 %
Class 3
6.49W – 12.94W
18.
PMOD – J9
The UEZGUI-EXP-DK Board includes one SPI PMOD type 2A connector. Make sure that the following jumpers on JP17 are
removed: 7 – 8, 9 – 10, 11 – 12, 13 – 14, and 15 – 16.
J9 Pin Number
Description
J9 Pin Number
Description
1
SPI Select
7
Interrupt output
2
SPI MOSI
8
Reset Input
3
SPI MISO
9
No Connect
4
SPI Clock
10
No Connect
5
Ground
11
Ground
6
3.3V
12
3.3V
