Microchip Technology MA180021 Manuale Utente

© 2007 Microchip Technology Inc.

DS51678A-page 11

This chapter discusses:
• Hardware Features
• Crystal
• Linear Regulator/Power Management
• LEDs
• Push Buttons
• Jumpers
• Hardware Considerations for Compliance Testing

The PIC18F87J50 FS USB PIM has a number of hardware features intended to 
make it useful as an initial development platform and demonstration board. Refer to 
Appendix A. “PIC18F87J50 FS USB Plug-In Module Schematics” for schematics of 
the PIM. The board offers the following hardware features:
1. 12 MHz miniature surface-mounted crystal.
2. 3.3V low IQ LDO linear regulator.
3. 2 bright red miniature LEDs (attached to I/O pins, RE0 and RE1).
4. MCLR push button for convenient device Reset.
5. General purpose push button (attached to I/O pin, RB4).
6. ICSP™ programming and debug 6-pin header.
7. USB mini-B connector.
8. Jumpers for added configurability (JP1, JP4, JP5).
9. Test points for convenient V

DD

, V

DDCORE

 and GND measurements.

Figure 3-1 shows where these key components are located on the PIM with item 
numbers corresponding to the above list.