The enCoRe II LV family brings the features and benefits of the enCoRe II to non-USB applications. The enCoRe II family has an integrated oscillator that eliminates the external crystal or resonator, reducing overall cost. Other external components, such as wake-up circuitry, are also integrated into this chip. The enCoRe II LV is a low-voltage, low-cost 8-bit Flashprogrammable microcontroller The enCoRe II LV features up to 36 general-purpose I/O (GPIO) pins. The I/O pins are grouped into five ports (Port 0 to 4). The pins on Port 0 and Port 1 may each be configured individually while the pins on Ports 2, 3, and 4 may only be configured as a group. Each GPIO port supports highimpedance inputs, configurable pull up, open drain output, CMOS/TTL inputs, and CMOS output with up to five pins that support programmable drive strength of up to 50 mA sink current. Additionally, each I/O pin can be used to generate a GPIO interrupt to the microcontroller. Each GPIO port has its own GPIO interrupt vector with the exception of GPIO Port 0. GPIO Port 0 has in addition to the port interrupt vector, three dedicated pins that have independent interrupt vectors (P0.2P0.4).