ZEN8105 Datasheet, ETC

8051 compatible Pipe-lined instruction based on the single-chip 8-bit micro-controller Flash ROM: 16K Bytes RAM: internal 256 Bytes and external 512 Bytes Operation volta.

The ZEN8105 is a fast 8051 compatible micro-controller with a redesigned CPU of no wasted clock and memory cycles. Typically, it will be faster than and exhibit better performance than the traditional 8051 at the same oscillator frequency. The ZEN810.