The KS86C6104/P6104 single-chip 8-bit microcontroller is fabricated using an advanced CMOS process. It is built around the powerful SAM87RI CPU core. Stop and Idle power-down modes were implemented to reduce power consumption. To increase on-chip register space, the size of the internal register file was logically expanded. The KS86C6104/P6104 has 4 Kbytes of program memory on-chip and 208 bytes of RAM including 16 bytes of working register. Using the SAM87Ri design approach, the following peripherals were integrated with the SAM87Ri core: -- Two configurable I/O ports (11 pins) -- 7 bit-programmable pins for external interrupts -- 8-bit timer/counter with two operating modes