Psion Teklogix OMNii HDK XT10, Руководство пользователя

Страница: 140 / 192

Chapter 9: Breakout Board
Power Configuration
130 Psion Teklogix Omnii HDK User Manual
Figure 9.5 VSYS Power Configuration
With the jumpers installed, power is supplied to the GPIO, UART and USB interfaces, the
HDK_3V3 (J34) and HDK_5V0 (J36) headers, and the scratch pad grid.
For further information on working with GPIO, UART or USB devices, see the appropriate
section (Section 9.6: “GPIO Devices”, Section 9.7: “RS-232 / UART Devices”, Section 9.8:
“USB Devices”).
The J34 and J36 headers have similar pin configurations. To access power from these headers,
construct wire harnesses with the following pinouts:
Figure 9.6 Power Headers J34 and J36 Pin Order
VSYS 3.3 V and 5.0 V power can be accessed directly from the scratch pad area at the side of the
breakout board. The scratch pad provides 20 solder points for HDK_3V3 power, 20 solder points
for HDK_5V0 power, and 40 solder points for connecting to ground. These solder points are
clearly marked on the board:
Table 9.2 Power Headers J34 and J36 Pinout
Pin Name Description
1,3,5 GND Ground
2,4,6 HDK_3V3
HDK_5V0 VSYS 3.3 V power (J34)
VSYS 5 V power (J36)
1 3 5
1 3 5
2 4 6
2 4 6