Architectural Overview

Zilog’s Z86E33/733/E34, E43/743/E44 8-Bit One-Time Programmable (OTP) Microcontrollers are members of Zilog’s single-chip Z8® MCU family featuring enhanced wake-up circuitry, programmable Watchdog Timers, Low Noise EMI options, and easy hardware/software system expansion capability.

Features

• Standard Temperature (VCC = 3.5 V to 5.5 V)

• Extended Temperature (VCC = 3.5 V to 5.5 V)

• Available Packages:

– 28-Pin DIP/SOIC/PLCC OTP (E33/733/E34)

– 40-Pin DIP OTP (E43/743/E44)

– 44-Pin PLCC/LQFP OTP (E43/743/E44)

• Software Enabled Watchdog Timer (WDT)

• Push-Pull/Open-Drain Programmable

on Port 0, Port 1, and Port 2

• 24/32 Input/Output Lines

• Clock-Free WDT Reset

• Auto Power-On Reset (POR)

• Programmable OTP Options:

– RC Oscillator

– EPROM Protect

– Auto Latch Disable

– Permanently Enabled WDT

– Crystal Oscillator Feedback Resistor Disable

– RAM Protect

• Low-Power Consumption: 60 mW

• Fast Instruction Pointer: 0.75 µs

• Two Standby Modes: STOP and HALT

• Digital Inputs CMOS Levels, Schmitt-Triggered

• Software Programmable Low EMI Mode

• Two Programmable 8-Bit Counter/Timers

Each with a 6-Bit Programmable Prescaler

• Six Vectored, Priority Interrupts

from Six Different Sources

• Two Comparators

• On-Chip Oscillator that Accepts a Crystal,

Ceramic Resonator, LC, RC, or External Clock Drive