Z86L825

The Z86L825/826/827 are ROM-based members of the Z8 MCU single-chip family of IR (infrared) with 237 bytes of general-purpose RAM and 4 KB of ROM.  ZiLOG's CMOS microcontrollers offer fast executing, efficient use of memory, sophisticated interrupts, input/output bit manipulation capabilities, automated pulse generation/reception, and internal key-scan pull-up transistors.

The Z86L825 architecture is based on ZiLOG's 8-bit microcontroller core with an Expanded Register File to allow access to register mapped peripherals, I/O circuits, and powerful counter/timer circuitry. The Z8 offers a flexible I/O scheme, an efficient register and address space structure, and a number of ancillary features that are useful in many consumer, automotive, computer peripheral, and battery operated hand-held applications.

The register file consists of 256 bytes of RAM. It includes three I/O port registers, 16 control and status registers and the rest are General Purpose registers. Register FEh (SPH) can be used as general purpose register. The Expanded Register File consists of two additional register groups (F and D).

The Z86L825 offers a new intelligent counter/timer architecture with 8-bit and 16- bit counter/timers (Figure 1). Also included are a large number of user-selectable modes, and two on-board comparators to process analog signals with separate  reference voltages.