Information

The PICDEM™ Lab II Development Board Layout
and Schematic Information Sheet
DS40001798A
If both jumpers connect the center and the top contacts (toward the 9V input), the 3.3V
and 5.0V are supplied by a pair of 1A switching regulators driven by the 9V input. If both
jumpers connect the center and the right contacts (toward the Click™ board
connectors), the 3.3V and 5.0V are supplied by the external power supply test points
(TP1/2 5.0V, TP3/4 3.3V; red test points are positive connections and black are
negative). If both jumpers connect the center and the bottom contacts, the 3.3V and
5.0V are supplied from the USB-Serial/I
2
C.
The blue potentiometer R7 adjusts the variable power supply voltage and is capable of
supplying maximum 100 mA.
J4 is a PICkit™ serial style connection for Serial/I
2
C. This device will enumerate as both
an I
2
C peripheral and a COM port on a PC.
An additional USB Mini-B socket J17 is available through connector J22 for
microcontrollers capable of supporting a USB interface. Connectors J5 and J8 provide
GND, variable voltage, 3.3V, and 5.0V supplies.
Two Click™ boards may be loaded into the sockets and wired individually to any of the
microcontrollers. Power and ground for the Click™ boards are supplied through
existing connections to the sockets.
Connectors J9/10 and J11/16 are provided for connecting external boards, LCD
modules or wires.
Additional Recommended Equipment and Software:
• PG164130 PICkit™ 3 Programmer/Debugger
• DV244005 REAL ICE™ Programmer/Debugger
• MPLAB
®
X IDE
•MCC MPLAB
®
Code Configurator
• MPLAB
®
XC Compilers
Note: A driver is required for the I
2
C™ operation, which can be downloaded,
along with a terminal program, from the Microchip web site:
www.microchip.com.
Note: Only V
SS is connected to the microcontroller DIP sockets, VDD must be
supplied from the appropriate power supply voltage, see connectors J5
and J8 above.
FIGURE 1: PICDEM™ LAB II DEVELOPMENT BOARD AND SCHEMATIC
ICSP™ Connectors
USB to I
2
C™/
Serial
Power Switch
and 9VDC
5.0V & 3.0V
Power supplies
Power select
jumpers
USB Header
Variable
voltage control
mikroBUS™
Host connectors
LCD Module Connector
Expansion
board
connector
Microcontroller
sockets: 40, 28,
20, 18, 14, 8, 6
Power connections