User manual
page 2
What's on Card
PIC18F8520 microcontroller. Featuring nanoWatt technology, it has up to
10 MIPS operation, 128K bytes of linear program memory, 3840 bytes of linear
data memory, and lot of internal modules.
10MHz crystal oscillator. We carefully chose the most convenient crystal
value that provides clock frequency which can be used directly, or with the PLL
multipliers and dividers to create higher MCU clock value.
VCAP jumper. Some PIC18FK and all PIC18FJ microcontrollers have cores that
work on 1.8V-2.5V voltage range, and peripherals that work with 3.3V and
5V voltages. Internally, those microcontrollers have power regulators which
adjust the core voltage levels. In order for those devices to have a stable
operation of the core, manufacturer recommends that decoupling capacitive
lters should be provided, and connected between specic microcontroller
pins designated with VCAP and GND. This MCU card provides a VCAP jumper
which is used for this purpose. Jumper is placed by default.
USB communication lines. These two jumpers, when in USB position, connect
D+ and D- lines of the on-board USB connector with RF3 and RF4 microcontroller
pins. Since PIC18F8520 doesn't support USB, jumpers are in I/O position.
VUSB line jumper. For PIC18F8xJ5x devices, this jumper should be connected
to VCC for enabling internal USB controller. Since PIC18F8520 doesn't support
USB, this jumper is in I/O position.
ENVREG selection jumper. PIC18FJ and PIC18FK microcontrollers are using
internal voltage regulator which is enabled by placing this jumper in VCC position.
For PIC18F8520 this jumper is in I/O position.
EasyPIC PRO
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Figure 1: MCU card with PIC18F8520