The Z86C83/C84 Consumer Controller Processors (CCPTM) are full-featured members of the CMOS Z8 microcontroller family offering a unique register-to-register architecture that avoids accumulator bottlenecks for higher code efficiency than RISC processors. The Z86C83/C84 are designed to be used in a wide variety of embedded control applications, such as appliances, process controls, keyboards, security systems, battery chargers, and automotive modules. For applications requiring powerful I/O capabilities, the Z86C83/C84 devices can have up to 21/17 (C83/C84 respectively) pins dedicated to input and output. These lines are grouped into three ports, and are configured by software to provide digital/analog I/O timing and status signals.