Z87233

ZiLOG's large Z8® family of 8-bit microcontrollers now includes the Z87233 product line, featuring an enhanced wake-up circuitry, programmable Watch-Dog Timers (WDT), and low-noise/EMI options. These enhancements to the Z8 offers a more efficient, cost-effective design and provides the user with increased design flexibility over the standard Z8 microcontroller core. The low-power-consumption CMOS microcontroller offers fast execution, efficient use of memory, sophisticated interrupts, input/output bit manipulation capabilities, and easy hardware/software system expansion.

The Z87233 subfamily features an Expanded Register File (ERF) to allow access to register-mapped peripheral and I/O circuits. Four basic address spaces are available to support this wide range of configurations: Program Memory, Register File, and ERF. The Register File is composed of 237 bytes of general-purpose registers, three I/O port registers, 15 control and status registers. The ERF consists of four control registers.

For applications demanding powerful I/O capabilities, the Z87233 offers 24 pins dedicated to input and output. These lines are configurable under software control.

The Z87233 family operates at 4MHz with a voltage range of 3.0 to 5.5VDC. To unburden the system from coping with real-time tasks such as counting/timing, the Z8 offers two on-chip counter/timers with a large number of user-selectable modes.

All signals with an overline are active Low. For example, B/W, for which WORD is active Low, and B/W, for which BYTE is active Low.