Zilog´s Z86C33 and Z86C43 MCUs feature an Expanded Register File (ERF) to allow access to register-mapped peripheral and I/O circuits. Four basic address spaces are available to support a wide range of configurations: Program Memory, Register File, Data Memory, and ERF. The Working Register File is composed of 236 bytes of general-purpose registers, 4 I/O port registers, and 15 control and status registers. The ERF consists of three control registers.

2 Standby Modes

2 Counter/Timers

ROM/RAM Protect

Low-Voltage Protection

2 Analog Comparators

Low EMI Option

Watch-Dog Timer

Power-On Reset

Clock-Free WDT Reset

Open-Drain Option

32 I/O Lines