GENERAL DESCRIPTION
The Z86E33/733/E34/E43/743/E44 8-bit CMOS One-Time Programmable (OTP) microcontrollers are members of Zilogs Z8® single-chip microcontroller family featuring enhanced wake-up circuitry, programmable Watch-Dog Timers, Low Noise EMI options, and easy hardware/software system expansion capability.
Four basic address spaces support a wide range of memory configurations. The designer has easy access to register mapped peripheral and I/O circuits.
For applications demanding powerful I/O capabilities, the Z86E33/733/E34 have 24 pins and the Z86E43/743/E44 have 32 pins of dedicated input and output. These lines are grouped into four ports, eight lines per port, and are configurable under software control to provide timing, status signals, and parallel I/O with or without handshake, and address/data bus for interfacing external memory.

FEATURES
■ Standard Temperature (VCC = 3.5V to 5.5V)
■ Extended Temperature (VCC = 4.5V to 5.5V)
■ 28-Pin DIP/SOIC/PLCC Packages (E33/733/E34)
   40-Pin DIP Package (E43/743/E44)
   44-Pin PLCC/QFP Packages (E43/743/E44)
■ Software Enabled Watch-Dog Timer (WDT)
■ Push-Pull/Open-Drain Programmable on
   Port 0, Port 1, and Port 2
■ Low-Power Consumption: 60 mW
■ Programmable Crystal Oscillator, EPROM Protect,
   RAM Protect, Auto Latch Disable, Permanent WDT,
   32 KHz Oscillator, and EPROM /Test Mode Disable
■ Fast Instruction Pointer: 0.6µs
■ Two Standby Modes: STOP and HALT
■ 24/32 Input and Output Lines
■ 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
■ Auto Latches
■ Auto Power-On Reset (POR)
■ Two Comparators
■ On-Chip Oscillator that Accepts a Crystal, Ceramic
   Resonator, LC, RC, or External Clock Drive