Microchip PIC

Cautions

Config

• NEVER disable the PIC's /MCLR (Reset) pin function
• NEVER program a PIC "in circuit" with ANY other connections to the target board

Circuit Design

• ALWAYS set MCLRE_ON in the config options and have MCLR pin with a 10K pull-up resistor to Vdd.

Initialization

• ALWAYS set the input pins and clear the output pins, excepting UART TX/RX.

i.e. SDO should have TRISX bit cleared, SDI should have TRISX bit set.