GENERAL DESCRIPTION

Zilogs Z86L78 is a low-voltage microcontroller, a member of the IR (Infrared) Family, with 16 KB of ROM and 493 bytes of general-purpose RAM. Manufactured in CMOS technology and offered in 20-pin DIP or SOIC styles packages, this cost-effective, low power consumption ROMbased device offers fast execution, efficient use of memory, sophisticated interrupts, input/output bit manipulation capabilities, automated pulse generation/reception, and easy hardware/software system expansion.

FEATURES

■ Low Power Consumption: 40 mW (Typical)

■ Three Standby Modes (Typical)

– STOP - 2 μA

– HALT - 0.8 mA

– Low Voltage (

■ Programmable Watch-Dog/Power-On Reset Circuits

■ All Digital Inputs are CMOS Levels

■ Five Priority Interrupts

– Three External

– Two Assigned to Counter/Timers

■ Two Independent Comparators with Programmable

Interrupt Polarity

■ On-Chip Oscillator that Accepts a Crystal, Ceramic

Resonator, LC, RC (Mask Selectable), or External Clock

Drive

■ Mask Selectable Option to Enable 32 kHz Crystal

Operation

■ Special Architecture to Automate Both Generation and

Reception of Complex Pulses or Signals:

– One Programmable 8-Bit Counter/Timer with Two

Capture Registers

– One Programmable 16-Bit Counter/Timer with

One Capture Register

– Programmable Input Glitch Filter for Pulse

Reception

■ Mask-Selectable 200 KOhm Pull-Ups on Ports 0, 2, 3:

– All Eight Port 2 Bits Individually Selected

– Pull-Ups Automatically Disabled Upon Selecting

an Output.